related | A high performance distributed graph database. | Database library

by niho Ruby Version: Current License: MIT

Download this library from

kandi X-RAY | related Summary

related is a Ruby library typically used in Database applications. related has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Related is meant to be a simple graph database that is fun, free and easy to use. The intention is not to compete with "real" graph databases like Neo4j, but rather to be a replacement for a relational database when your data is better described as a graph. For example when building social software. Related is very similar in scope and functionality to Twitters FlockDB, but is among other things designed to be easier to setup and use. Related also has better documentation and is easier to hack on. The intention is to be web scale, but we ultimately rely on the ability of Redis to scale (using Redis Cluster for example). Read more about the philosophy behind Related in the [Wiki](http://github.com/sutajio/related/wiki).

Support

Quality

Security

License

Reuse

kandi-support Support

related has a low active ecosystem.
It has 130 star(s) with 14 fork(s). There are 10 watchers for this library.
It had no major release in the last 12 months.
There are 10 open issues and 2 have been closed. On average issues are closed in 1066 days. There are 1 open pull requests and 0 closed requests.
It has a neutral sentiment in the developer community.
The latest version of related is current.

related Support

Best in #Database

Average in #Database

related Support

Best in #Database

Average in #Database

quality kandi Quality

related has 0 bugs and 0 code smells.

related Quality

Best in #Database

Average in #Database

related Quality

Best in #Database

Average in #Database

security Security

related has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
related code analysis shows 0 unresolved vulnerabilities.
There are 0 security hotspots that need review.

related Security

Best in #Database

Average in #Database

related Security

Best in #Database

Average in #Database

license License

related is licensed under the MIT License. This license is Permissive.
Permissive licenses have the least restrictions, and you can use them in most projects.

related License

Best in #Database

Average in #Database

related License

Best in #Database

Average in #Database

build Reuse

related releases are not available. You will need to build from source code and install.
Installation instructions, examples and code snippets are available.
related saves you 661 person hours of effort in developing the same functionality from scratch.
It has 1534 lines of code, 192 functions and 21 files.
It has medium code complexity. Code complexity directly impacts maintainability of the code.

related Reuse

Best in #Database

Average in #Database

related Reuse

Best in #Database

Average in #Database

Top functions reviewed by kandi - BETA

kandi has reviewed related and discovered the below as its top functions. This is intended to give you an instant insight into related implemented functionality, and help decide if they suit your requirements.

Allows accessor to the serializer .
Delete all related documents
Creates a new relation
Queues data for given data
The object s attributes of the resource .
Updates this object .
Validates an entity with the given id .
Derives the key pair of key pair
Return the node key for this node
Enqueue a given data flow

related Key Features

A high performance distributed graph database.

related Examples and Code Snippets

See all related Code Snippets

Setup

Copy

Download

$ gem install related

Example usage

Copy

Download

node = Related::Node.create(:name =&gt; 'Example', :popularity =&gt; 2.3)
node.new?
node.popularity = 100
node.attributes
node.has_attribute?(:popularity)
node.read_attribute(:popularity)
node.write_attribute(:popularity, 50)
node.increment!(:popularity, 10)
node.decrement!(:popularity, 10)
Related::Node.increment!(node, :popularity, 10)
Related::Node.decrement!(node, :popularity, 10)
node.save
node.persisted?
node = Related::Node.find(node.id)
node.destroy
node.destroyed?

node1 = Related::Node.create
node2 = Related::Node.create
rel = Related::Relationship.create(:friends, node1, node2, :have_met =&gt; true)

n = Related::Node.find(node1.id)
nn = Related::Node.find(node1.id, node2.id)

n = Related::Node.find(node1.id, :fields =&gt; [:name])
nn = Related::Node.find(node1.id, node2.id, :fields =&gt; [:name])

The root node

Copy

Download

Related::Relationship.create(:example, Related.root, node)
Related.root.outgoing(:example)

Properties

Copy

Download

class Event &lt; Related::Node
  property :title, String
  property :attending_count, Integer
  property :popularity, Float
  property :start_date, DateTime
  property :location do |value|
    "http://maps.google.com/maps?q=#{value}"
  end
end

Weight

Copy

Download

class Comment &lt; Related::Relationship
  property :created_at, Time
  property :points, Integer
  weight do |direction|
    if direction == :in
      self.created_at
    elsif direction == :out
      self.points
    end
  end
end

ActiveModel

Copy

Download

class Like &lt; Related::Relationship
  validates_presence_of :how_much
  validates_numericality_of :how_much

  after_save :invalidate_cache

  def invalidate_cache
    ...
  end
end

Follower

Copy

Download

require 'related/follower'

class User &lt; Related::Node
  include Related::Follower
end

user1 = User.create
user2 = User.create

user1.follow!(user2)
user1.unfollow!(user2)
user2.followers
user1.following
user1.friends
user2.followed_by?(user1)
user1.following?(user2)
user2.followers_count
user1.following_count

Real-time Stream Processing

Copy

Download

Related.data_flow :comment, Tokenize =&gt; { CountWords =&gt; { TotalSum =&gt; nil, MovingAverage =&gt; nil } }

Distributed cluster setup

Copy

Download

Related.redis = Redis::Distributed.new %w[
  redis://redis-1.example.com
  redis://redis-2.example.com
  redis://redis-3.example.com
  redis://redis-4.example.com],
  :tag =&gt; /^related:([^:]+)/

Using Related with another database

Copy

Download

class CustomNode
  include Ripple::Document
  include Related::Node::QueryMethods

  def query
    Related::Node::Query.new(self)
  end
end

Development

Copy

Download

git clone git://github.com/sutajio/related.git
cd related
rake test

How to fade edges of background image of element to blend in with the main background image?

Copy

Download

.body {
  display: grid;
  width: 200px;
  height: 200px;
  /* replace with the image you like here */
  background-image: repeating-linear-gradient(-45deg,
      yellow,
      yellow 20px,
      black 20px,
      black 40px);
}

.content {
  margin: 25px;
  /* replace with the image you like here */
  background-image: linear-gradient(to top, blue 0%, blue 100%);
  
  /* for webkit-based browsers */
  -webkit-mask-image:
    linear-gradient(to top, black 0%, black 100%),
    linear-gradient(to top, transparent 0%, black 100%),
    linear-gradient(to right, transparent 0%, black 100%),
    linear-gradient(to bottom, transparent 0%, black 100%),
    linear-gradient(to left, transparent 0%, black 100%);
  -webkit-mask-position:
    center,
    top,
    right,
    bottom,
    left;
  -webkit-mask-size:
    100% 100%,
    100% 10px,
    10px 100%,
    100% 10px,
    10px 100%;
  -webkit-mask-repeat:
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat;
   -webkit-mask-composite:
    source-out,
    source-over,
    source-over,
    source-over;
    
   /* for browsers which have implemented the official spec */
  mask-image:
    linear-gradient(to top, black 0%, black 100%),
    linear-gradient(to top, transparent 0%, black 100%),
    linear-gradient(to right, transparent 0%, black 100%),
    linear-gradient(to bottom, transparent 0%, black 100%),
    linear-gradient(to left, transparent 0%, black 100%);
  mask-position:
    center,
    top,
    right,
    bottom,
    left;
  mask-size:
    100% 100%,
    100% 10px,
    10px 100%,
    100% 10px,
    10px 100%;
  mask-repeat:
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat;
  mask-composite:
    subtract,
    add,
    add,
    add;
}

<div class="body">
  <div class="content"></div>
</div>

-----------------------

.body {
  display: grid;
  width: 200px;
  height: 200px;
  /* replace with the image you like here */
  background-image: repeating-linear-gradient(-45deg,
      yellow,
      yellow 20px,
      black 20px,
      black 40px);
}

.content {
  margin: 25px;
  /* replace with the image you like here */
  background-image: linear-gradient(to top, blue 0%, blue 100%);
  
  /* for webkit-based browsers */
  -webkit-mask-image:
    linear-gradient(to top, black 0%, black 100%),
    linear-gradient(to top, transparent 0%, black 100%),
    linear-gradient(to right, transparent 0%, black 100%),
    linear-gradient(to bottom, transparent 0%, black 100%),
    linear-gradient(to left, transparent 0%, black 100%);
  -webkit-mask-position:
    center,
    top,
    right,
    bottom,
    left;
  -webkit-mask-size:
    100% 100%,
    100% 10px,
    10px 100%,
    100% 10px,
    10px 100%;
  -webkit-mask-repeat:
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat;
   -webkit-mask-composite:
    source-out,
    source-over,
    source-over,
    source-over;
    
   /* for browsers which have implemented the official spec */
  mask-image:
    linear-gradient(to top, black 0%, black 100%),
    linear-gradient(to top, transparent 0%, black 100%),
    linear-gradient(to right, transparent 0%, black 100%),
    linear-gradient(to bottom, transparent 0%, black 100%),
    linear-gradient(to left, transparent 0%, black 100%);
  mask-position:
    center,
    top,
    right,
    bottom,
    left;
  mask-size:
    100% 100%,
    100% 10px,
    10px 100%,
    100% 10px,
    10px 100%;
  mask-repeat:
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat;
  mask-composite:
    subtract,
    add,
    add,
    add;
}

<div class="body">
  <div class="content"></div>
</div>

Identify distinct mappings of two overlapping columns in Pandas

Copy

Download

import networkx as nx
G = nx.from_pandas_edgelist(df, 'id_1', 'id_2')
l = list(nx.connected_components(G))
l
Out[66]: [{'A', 'B', 'C'}, {'D', 'E'}, {'F', 'G'}, {'H', 'I', 'J'}, {'K', 'L', 'M'}]

from functools import reduce
d = reduce(lambda a, b: {**a, **b}, [dict.fromkeys(y,x) for x, y in enumerate(l)])
df['g'] = df.id_1.map(d)
df
Out[76]: 
  id_1 id_2  g
0    A    B  0
1    A    C  0
2    D    E  1
3    F    G  2
4    H    I  3
5    H    J  3
6    K    L  4
7    M    L  4

-----------------------

import networkx as nx
G = nx.from_pandas_edgelist(df, 'id_1', 'id_2')
l = list(nx.connected_components(G))
l
Out[66]: [{'A', 'B', 'C'}, {'D', 'E'}, {'F', 'G'}, {'H', 'I', 'J'}, {'K', 'L', 'M'}]

from functools import reduce
d = reduce(lambda a, b: {**a, **b}, [dict.fromkeys(y,x) for x, y in enumerate(l)])
df['g'] = df.id_1.map(d)
df
Out[76]: 
  id_1 id_2  g
0    A    B  0
1    A    C  0
2    D    E  1
3    F    G  2
4    H    I  3
5    H    J  3
6    K    L  4
7    M    L  4

Managing nested Firebase realtime DB queries with await/async

Copy

Download

  Object.keys(event.participants).forEach(async (value: any) => {

-----------------------

async function afterEventHostMail() {
 // Initialize variables
  events = [];

  await admin.database().ref('/events_geo').once('value').then(snapshots => {
    snapshots.forEach(snapshot => {
      var event = snapshot.val();
      var eventKey = snapshot.key;
      
      // Do some filtering
      const mergedObj = { ...event, ...{ key: eventKey } };
      events.push(mergedObj)
    });
  });

  for (const event of events) {
    // Do a ton of await calls here
  }

  // The rest of the function
}

Flutter show iconButton based on Map

Copy

Download

static const Map<String, Map<String, String>> social = {
    'personA': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personB': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personC': {
      'facebook': 'https://www.facebook.com/...',
    },
  };

List<Map<String,String>> listUsers = List().from(social.values);

[...]
ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
[...]

Row(
              children: <Widget>[
                ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
                      return Column(children:[
                            if (listUsers[index].containsKey('twitch'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.twitch), onPressed: (){//Access listUsers[index]['twitch'] here
                                }),
                            if (listUsers[index].containsKey('instagram'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.instagram), onPressed: (){//Access listUsers[index]['instagram'] here
                                })
                       ])
                    }
                )
              ],
            ),

-----------------------

static const Map<String, Map<String, String>> social = {
    'personA': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personB': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personC': {
      'facebook': 'https://www.facebook.com/...',
    },
  };

List<Map<String,String>> listUsers = List().from(social.values);

[...]
ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
[...]

Row(
              children: <Widget>[
                ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
                      return Column(children:[
                            if (listUsers[index].containsKey('twitch'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.twitch), onPressed: (){//Access listUsers[index]['twitch'] here
                                }),
                            if (listUsers[index].containsKey('instagram'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.instagram), onPressed: (){//Access listUsers[index]['instagram'] here
                                })
                       ])
                    }
                )
              ],
            ),

-----------------------

static const Map<String, Map<String, String>> social = {
    'personA': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personB': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personC': {
      'facebook': 'https://www.facebook.com/...',
    },
  };

List<Map<String,String>> listUsers = List().from(social.values);

[...]
ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
[...]

Row(
              children: <Widget>[
                ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
                      return Column(children:[
                            if (listUsers[index].containsKey('twitch'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.twitch), onPressed: (){//Access listUsers[index]['twitch'] here
                                }),
                            if (listUsers[index].containsKey('instagram'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.instagram), onPressed: (){//Access listUsers[index]['instagram'] here
                                })
                       ])
                    }
                )
              ],
            ),

VBA - NULL values in Listview

Copy

Download

Function getFieldValue(fVal As Variant, Optional defaultValue = "") As String
    If IsNull(fVal) Then
        getFieldValue = defaultValue
    Else
        getFieldValue = CStr(fVal)
    End If
End Function

    Do Until rs.EOF
        Set ListItm = QueryResults.ListItems.Add(getFieldValue(rs(1).Value))
        For Count = 2 To rs.Fields.Count
            ListItm.ListSubItems.Add Text:=getFieldValue(rs(Count).Value)
        Nex
        rs.MoveNext
    Loop

-----------------------

Function getFieldValue(fVal As Variant, Optional defaultValue = "") As String
    If IsNull(fVal) Then
        getFieldValue = defaultValue
    Else
        getFieldValue = CStr(fVal)
    End If
End Function

    Do Until rs.EOF
        Set ListItm = QueryResults.ListItems.Add(getFieldValue(rs(1).Value))
        For Count = 2 To rs.Fields.Count
            ListItm.ListSubItems.Add Text:=getFieldValue(rs(Count).Value)
        Nex
        rs.MoveNext
    Loop

Refer to variables dynamically

Copy

Download

webhooks = {
    "Boston": "boston url",
    "Budapest": "budapest url"
}

# this will give you Boston webhook
myTeamsMessage = pymsteams.connectorcard(location + webhooks["Boston"])

-----------------------

webhooks = {
    "Boston": "boston url",
    "Budapest": "budapest url"
}

# this will give you Boston webhook
myTeamsMessage = pymsteams.connectorcard(location + webhooks["Boston"])

-----------------------

webhooks = {'Boston':'www.url.com',
            'Budapest':'www.url1.com',
           }

Setting data in state not working in Vue 3 with Vuex 4

Copy

Download

import { computed , onMounted} from "vue";
import { useStore } from 'vuex';

export default{
  setup() {
    const store = useStore();
    const user = computed(() => store.state.user);
    const productsTest = computed(() => store.state.products);
   
  onMounted(()=>{
    store.dispatch('GET_USER');
    store.dispatch('GET_PRODUCTS');
  })
    return {
      user,
      productsTest
    };
  }
}

-----------------------

const app = createApp({
    mounted(){
        store.dispatch('YOUR_ACTION') // GET_USER or GET_PRODUCTS in OP's case
    }
});

import { computed } from "vue";
import { useStore } from "vuex";

setup() {
        const store = useStore();
       
        return {
            products: computed(() => store.state.YOUR_STATE), 
            //replace YOUR_STATE with your own. In OP's case, it's user or products
        };
    }

-----------------------

const app = createApp({
    mounted(){
        store.dispatch('YOUR_ACTION') // GET_USER or GET_PRODUCTS in OP's case
    }
});

import { computed } from "vue";
import { useStore } from "vuex";

setup() {
        const store = useStore();
       
        return {
            products: computed(() => store.state.YOUR_STATE), 
            //replace YOUR_STATE with your own. In OP's case, it's user or products
        };
    }

Vaadin TextArea set starting row number to 1

Copy

Download

var textArea = new TextArea();
textArea.getElement().executeJs("this.shadowRoot.querySelector('textarea').rows = $0;", rows);

Mobile is displaying "miniature" of desktop content layout instead to adjust accordingly to its width

Copy

Download

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./style.css">
    <title>Document</title>
</head>
<body>
    <div id="oepanel" class="OEContainer" >
        <div id="oecell11" class="OECell">
            cell 1
        </div>
        <div id="oecell12" class="OECell">
            cell 2
        </div>
        <div id="oecell13" class="OECell">
            cell 3
        </div>
</div>
</body>
</html>

.OEContainer {
    background-color: lightblue;
    border: 3px solid #000000;
    min-height: 10em;
    vertical-align: middle;
    padding: 10px;
    max-width:1130px;
    margin:auto;
    text-align:center;
    display: flex;
    justify-content:space-between;
}
  
.OECell {
    background-color: lightblue;
    border: 3px solid #73AD21;
    min-height: 10em;
    vertical-align: middle;
    padding: 0px;
    width:250px;
    text-align:center;
    float: left;
    margin: 5px;
}

@media (max-width: 500px) {
    .OEContainer {
        flex-direction: column;
        align-items: center;
    }
}

-----------------------

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./style.css">
    <title>Document</title>
</head>
<body>
    <div id="oepanel" class="OEContainer" >
        <div id="oecell11" class="OECell">
            cell 1
        </div>
        <div id="oecell12" class="OECell">
            cell 2
        </div>
        <div id="oecell13" class="OECell">
            cell 3
        </div>
</div>
</body>
</html>

.OEContainer {
    background-color: lightblue;
    border: 3px solid #000000;
    min-height: 10em;
    vertical-align: middle;
    padding: 10px;
    max-width:1130px;
    margin:auto;
    text-align:center;
    display: flex;
    justify-content:space-between;
}
  
.OECell {
    background-color: lightblue;
    border: 3px solid #73AD21;
    min-height: 10em;
    vertical-align: middle;
    padding: 0px;
    width:250px;
    text-align:center;
    float: left;
    margin: 5px;
}

@media (max-width: 500px) {
    .OEContainer {
        flex-direction: column;
        align-items: center;
    }
}

Pandas: add number of unique values to other dataset (as shown in picture):

Copy

Download

def c_value(a_value, right_table):
    c_ids = []
    for index, row in right_table.iterrows():
        if row['A'] == a_value:
            if row['C'] not in c_ids:
                c_ids.append(row['C'])
    return len(c_ids)

new_column = []
for index, row in left_table.iterrows():
    new_column.append(c_value(row['A'],right_table))
left_table["C-count"] = new_column

-----------------------

def c_value(a_value, right_table):
    c_ids = []
    for index, row in right_table.iterrows():
        if row['A'] == a_value:
            if row['C'] not in c_ids:
                c_ids.append(row['C'])
    return len(c_ids)

new_column = []
for index, row in left_table.iterrows():
    new_column.append(c_value(row['A'],right_table))
left_table["C-count"] = new_column

-----------------------

>>> count_df = df2.groupby('A', as_index=False).C.nunique()
>>> output = pd.merge(df1, count_df, on='A')
>>> output.rename(columns={'C':'C-count'}, inplace=True)
>>> output
   A   B  C-count
0  2  22        3
1  3  23        2
2  5  21        1
3  1  24        1
4  6  21        1

-----------------------

df1['C-count'] = df1['A'].map(df2.groupby('A')['C'].nunique())

See all related Code Snippets

Community Discussions

Trending Discussions on related

How to fade edges of background image of element to blend in with the main background image?
Identify distinct mappings of two overlapping columns in Pandas
General approach to parsing text with special characters from PDF using Tesseract?
Managing nested Firebase realtime DB queries with await/async
Flutter show iconButton based on Map
VBA - NULL values in Listview
Refer to variables dynamically
Technical Framework for IoT Emergency Systems
Setting data in state not working in Vue 3 with Vuex 4
How to create a working VHDX in Azure CI Build Pipeline?

Trending Discussions on related

QUESTION

How to fade edges of background image of element to blend in with the main background image?

Asked 2021-Jun-16 at 03:34

I've come across an issue of trying to fade the edges of the background image of a div so that it looks like it's blending with the background image of the full site (so the background image applied to the body).

<head>
  <style>
  body{
    background-image: url('some url here') !important;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: 100%;
    background-size: 1150px;
  }
  #blendElement{
    background: url('some other url here');
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: 100%;
  }
  </style>
</head>

<body>
 <div>
   <div id="blendElement"> This should have edges blending to the main (body's) background image behind it.
   </div>
 </div>
</body>

If you've ever used PowerPoint and tried an image effect called soft edges, that's exactly what I'm trying to do here. The only related "answer" I was able to find was for solid body background colors by using box-shadow with inset:

box-shadow: 25px 25px 50px 0 (color matching background color) inset;

But since the body has a background image and not a solid color, there's no way to make it look like it's blending in. And obviously using a transparent color in box shadow just shows the div background image as it normally would look.

Could someone help me out with this? (And I can't edit the div image to give it transparent fading edges, so it'll have to be directly done with CSS or JS)

ANSWER

Answered 2021-Jun-16 at 02:49

You can use the background as gradient where the edges are rgba(0,0,0,0). This way it will smoothly blend with background. But this will not work for images. For images You will have to a div of background color and rgba(0,0,0,0) in gradient with color facing outward.

Source https://stackoverflow.com/questions/67995632

QUESTION

General approach to parsing text with special characters from PDF using Tesseract?

Asked 2021-Jun-15 at 20:17

I would like to extract the definitions from the book The Navajo Language: A Grammar and Colloquial Dictionary by Young and Morgan. They look like this (very blurry):

I tried running it through the Google Cloud Vision API, and got decent results, but it doesn't know what to do with these "special" letters with accent marks on them, or the curls and lines on/through them. And because of the blurryness (there are no alternative sources of the PDF), it gets a lot of them wrong. So I'm thinking of doing it from scratch in Tesseract. Note the term is bold and the definition is not bold.

How can I use Node.js and Tesseract to get basically an array of JSON objects sort of like this:

[
  ...
  { "term": "'odahizhdoojih, yo/o/", "definition": "they will carry ..." },
  ...
]

The details of what the term looks like is not super important here (I'll encode it in unicode), I'm mainly wondering how the architecture should be for Node.js to do this, and how I should properly train the system? Do I need to take screenshots of the words and somehow train it with manual annotations? How does this generally work in this situation?

Tesseract training for a new font

ANSWER

Answered 2021-Jun-15 at 20:17

Tesseract takes a lang variable that you can expand to include different languages if they're installed. I've used the UB Mannheim (https://github.com/UB-Mannheim/tesseract/wiki) installation which includes a ton of languages supported.

To get better and more accurate results, the best thing to do is to process the image before handing it to Tesseract. Set a white/black threshold so that you have black text on white background with no shading. I'm not sure how to do this in Node, but I've done it with Python's OpenCV library.

If that font doesn't get you decent results with the out of the box, then you'll want to train your own, yes. This blog post walks through the process in great detail: https://towardsdatascience.com/simple-ocr-with-tesseract-a4341e4564b6. It revolves around using the jTessBoxEditor to hand-label the objects detected in the images you're using.

Edit: In brief, the process to train your own:

Install jTessBoxEditor (https://sourceforge.net/projects/vietocr/files/jTessBoxEditor/). Requires Java Runtime installed as well.
Collect your training images. They want to be .tiffs. I found I got fairly accurate results with not a whole lot of images that had a good sample of all the characters I wanted to detect. Maybe 30/40 images. It's tedious, so you don't want to do TOO many, but need enough in order to get a good sampling.
Use jTessBoxEditor to merge all the images into a single .tiff
Create a training label file (.box)j. This is done with Tesseract itself. tesseract your_language.font.exp0.tif your_language.font.exp0 makebox
Now you can open the box file in jTessBoxEditor and you'll see how/where it detected the characters. Bounding boxes and what character it saw. The tedious part: Hand fix all the bounding boxes and characters to accurately represent what is in the images. Not joking, it's tedious. Slap some tv episodes up and just churn through it.
Train the tesseract model itself

save a file: font_properties who's content is font 0 0 0 0 0
run the following commands:

tesseract num.font.exp0.tif font_name.font.exp0 nobatch box.train

unicharset_extractor font_name.font.exp0.box

shapeclustering -F font_properties -U unicharset -O font_name.unicharset font_name.font.exp0.tr

mftraining -F font_properties -U unicharset -O font_name.unicharset font_name.font.exp0.tr

cntraining font_name.font.exp0.tr

You should, in there close to the end see some output that looks like this:

Master shape_table:Number of shapes = 10 max unichars = 1 number with multiple unichars = 0

That number of shapes should roughly be the number of characters present in all the image files you've provided.

If it went well, you should have 4 files created: inttemp normproto pffmtable shapetable. Rename them all with the prefix of your_language from before. So e.g. your_language.inttemp etc.

Then run:

combine_tessdata your_language

The file: your_language.traineddata is the model. Copy that into your Tesseract's data folder. On Windows, it'll be like: C:\Program Files x86\tesseract\4.0\tessdata and on Linux it's probably something like /usr/shared/tesseract/4.0/tessdata.

Then when you run Tesseract, you'll pass the lang=your_language. I found best results when I still passed an existing language as well, so like for my stuff it was still English I was grabbing, just funny fonts. So I still wanted the English as well, so I'd pass: lang=your_language+eng.

Source https://stackoverflow.com/questions/67991718

QUESTION

Managing nested Firebase realtime DB queries with await/async

Asked 2021-Jun-15 at 19:34

I'm writing a Firebase function (Gist) which

Queries a realtime database ref (events) in the following fashion:

await admin.database().ref('/events_geo').once('value').then(snapshots => {
Iterates through all the events

snapshots.forEach(snapshot => {
Events are filtered by a criteria for further processing
Several queries are fired off towards realtime DB to get details related to the event

await database().ref("/ratings").orderByChild('fk_event').equalTo(snapshot.key).once('value').then(snapshots => {
Data is prepared for SendGrid and the processing is finished

All of the data processing works perfectly fine but I can't get the outer await (point 1 in my list) to wait for the inner awaits (queries towards realtime DB) and thus when SendGrid should be called the data is empty. The data arrives a little while later. Example output from Firebase function logs can be seen below:

10:54:12.642 AM Function execution started

10:54:13.945 AM There are no emails to be sent in afterEventHostMailGoodRating

10:54:14.048 AM There are no emails to be sent in afterEventHostMailBadRating

10:54:14.052 AM Function execution took 1412 ms, finished with status: 'ok'

10:54:14.148 AM <p style="margin: 1em 0px;">Super hyggelig aften :)</p><p style="margin: 1em 0px;">super oplevelse, ... long string generated

Gist showing the function in question

I'm probably mixing up my async/awaits because of the awaits inside the await. But I don't see how else the code could be written without splitting it out into many atomic pieces but that would still require stitching a bunch of awaits together and make it harder to read.

So, two questions in total. Can this code work and what would be the ideal way to handle this pattern of making further processing on top of data fetched from Realtime DB?

Best regards, Simon

ANSWER

Answered 2021-Jun-15 at 11:20

Your problem is that you use async in a foreEach loop here:

  Object.keys(event.participants).forEach(async (value: any) => {

The forEach loops don't support async calls. You need to map the data to an normal array and use a for loop. There you can use await normaly.

Source https://stackoverflow.com/questions/67984092

QUESTION

Flutter show iconButton based on Map

Asked 2021-Jun-15 at 19:06

i have a map like this:

static const Map<String, Map<String, String>> social = {
    'personA': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personB': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personC': {
      'facebook': 'https://www.facebook.com/...',
    },
  };

It's possible to show iconButton, with the font_awesome icon, for each social related to each person, and on click redirect to the link?, how ?

i tried like this:

Row(
              children: <Widget>[
                ListView.builder(
                    itemBuilder: (_) {
                      return Constants.social[person].keys.map((e) =>
                          IconButton(icon: FaIcon(FontAwesomeIcons.e), onPressed: {
                            print("example");
                          });
                      );
                    }
                )
              ],
            ),

but i receive the error:

The argument type 'Widget Function(BuildContext)' can't be assigned to the parameter type 'Widget Function(BuildContext, int)'

the variable person can contain personA, personB or personC.

For example for personA i want to to show 2 iconButton one for twitch and one for instagram but for personC i want to show only facebook icon.

ANSWER

Answered 2021-Jun-15 at 19:06

ListView is a widget that represents a list of widgets arranged linearly.

You have multiple constructors for this widget. The one you used, ListView.builder() is the one suggested when there is a large number of children to be displayed. (In your example, if the Map contains many players.)

The default constructor only requires a List<Widget> and is considerably more simple. If you don't have a large map, I strongly suggest you to use this one instead. But since you tried using the builder one, you should do as follow:

First, have your data arranged in a List. This way you can access the elements through an integer index easily: List[0]. Ideally you should have the data already in a list form, but if you need you can convert it like this:

static const Map<String, Map<String, String>> social = {
    'personA': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personB': {
      'twitch': 'https://www.twitch.tv/...',
      'instagram': 'https://www.instagram.com/.../'
    },
    'personC': {
      'facebook': 'https://www.facebook.com/...',
    },
  };

List<Map<String,String>> listUsers = List().from(social.values);

For more information on these methods, check this and this.

Supply the number of itens your listview will have through the itemCount parameter:

[...]
ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
[...]

Your error says the builder function needs to receive another integer parameter:

'Widget Function(BuildContext)' can't be assigned to the parameter type

'Widget Function(BuildContext, int)```.

This integer parameter represents what widget in the list it will be. Your builder function needs to return only one widget, and it receives the index parameter so you can know which one it is:

Row(
              children: <Widget>[
                ListView.builder(
                    itemCount: listUsers.length,
                    itemBuilder: (context, index) {
                      return Column(children:[
                            if (listUsers[index].containsKey('twitch'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.twitch), onPressed: (){//Access listUsers[index]['twitch'] here
                                }),
                            if (listUsers[index].containsKey('instagram'))
                                IconButton(icon: FaIcon(FontAwesomeIcons.instagram), onPressed: (){//Access listUsers[index]['instagram'] here
                                })
                       ])
                    }
                )
              ],
            ),

This should be enough to have your desired result. As a suggestion, you can read the official documentation which has many good examples and explanations. The Dart Language tour is also a great place for examples about the language. They are both well written and in this case would get you in the right track.

Source https://stackoverflow.com/questions/67989064

QUESTION

VBA - NULL values in Listview

Asked 2021-Jun-15 at 17:10

I've created a simple VBA interface to connect Excel to a MySQL DB. The VBA part acts as a preview of data for the user to choose what item he wants to import to the Excel sheet.

Until now I've work with a very complete set of data, but I got to a Table which (because of the nature of the items) some fields are NULL.

Now every time I try to check the values in the VBA I get the Run-time error 13 Type mismatch in the listview component. At first I though it was a field with DECIMAL typing, but after changing it to a DOUBLE (for testing) the problem persisted, and it was until I notice that if only checks columns with no NULL value, the problem disappears. Off course I can't omit this values.

I tried some .Tostring functions but with no success. And I failed to implement a IF to check for NULL in the obj.

This is my code:

Private Sub Exec_search_Click()

'Define variables related to Form
Dim Prod_input As MSForms.TextBox
Dim QueryResults As ListView

' Connection variables
Dim rs As ADODB.Recordset
Dim conn As New ADODB.Connection
Dim ConnCmd As ADODB.Command
Dim ColNames As ADODB.Fields
Dim sqlstr As String ' SQL to perform various actions

Dim server_name As String
Dim database_name As String
Dim user_id As String
Dim password As String
Dim ProductName As String

Dim Count As Integer


'Grab the product
Set Prod_inputText = Me.Controls.Item("Prod_input")
ProductName = Prod_inputText.Value
    
Set QueryResults = Me.Controls.Item("QueryResults")

server_name = "localhost"
database_name = "#####"
user_id = "########"
password = "#########"

Set conn = New ADODB.Connection
conn.Open "DRIVER={MySQL ODBC 8.0 ANSI Driver}" _
& ";SERVER=" & server_name _
& ";DATABASE=" & database_name _
& ";UID=" & user_id _
& ";PWD=" & password & ""



' Extract MySQL table data to first worksheet in the workbook
Set rs = New ADODB.Recordset
Set ConnCmd = New ADODB.Command

sqlstr = "SELECT referencia, descricao, pvp FROM produtos WHERE referencia LIKE '" & ProductName & "%'" ' extracts all data
rs.Open sqlstr, conn


'This will allow the command object to use the active connection
ConnCmd.ActiveConnection = conn

'Define the query string (Comes from our textbox) & the command type
ConnCmd.CommandText = sqlstr
ConnCmd.CommandType = adCmdText

'Exectue the query & get the column names (Fields)
Set rs = ConnCmd.Execute
Set ColNames = rs.Fields

'Write the results to query section
With QueryResults
    
    'Lets clear the old results
    .ColumnHeaders.Clear
    .ListItems.Clear

    'For each field name, add it to the list view as a column header
    For Each ColName In ColNames
        
        'Go to the column headers collection, and use the add method to add a new header
        .ColumnHeaders.Add Text:=ColName.Name
        
    Next
    
   ' If the recordset is empty, display a message
   If rs.EOF Then
        
        'Display the message
        MsgBox Prompt:="The query returned no results. No Data to display.", Buttons:=vbInformation, Title:="Query Status"
        
        'Close the connection
        conn.Close
        
        'Exit the sub
        Exit Sub
        
   Else 'Otherwise begin populating the list view
        
        'Grab the recordset
        With rs
        
            'Keep going until you've reach the end of the recordset
            Do Until .EOF
            
            'Initialize a count, this will help to determine whether to add a new row vice a new column
            Count = 1
            
                'Loop through all the fields in the recordset
                For Each fld In .Fields
                
                    'If it's the first field of the recordset, that means we have the first column of a new row
                    If Count = 1 Then
                    
                        'If it's a new row, then we will add a new ListItems (ROW) object
                        Set ListItm = QueryResults.ListItems.Add(Text:=fld.Value)
                    
                    Else
                    
                        'If it's not a new row, then add a ListSubItem (ELEMENT) instead
                        ListItm.ListSubItems.Add Text:=fld.Value
                    
                    End If
                    
                    'Make sure to increment the count, or else EVERYONE will be a "New Row"
                    Count = Count + 1
                
                Next
            
            'Move to the next recordset
            .MoveNext
            
            Loop
        End With
        
        'When you're done with all the recordsets close the connection
        conn.Close

    End If
    
End With

End Sub

I get the error in the line : ListItm.ListSubItems.Add Text:=fld.Value

I only started working on VBA very recently, so I might be missing something simple, and I didn't find anything related to this problem in here, but also, I'm very new to SO.

ANSWER

Answered 2021-Apr-13 at 10:28

If you don't want to add a IsNull-function in you SQL (as Nathan_Sav suggested as a comment): There is a IsNull-function in VBA. With that, you can create a simple function that returns for example an empty string (or a 0 or whatever you prefer):

Function getFieldValue(fVal As Variant, Optional defaultValue = "") As String
    If IsNull(fVal) Then
        getFieldValue = defaultValue
    Else
        getFieldValue = CStr(fVal)
    End If
End Function

Your code, btw, could be simpler if you loop over the fields of the recordset using a counter rather than a for each-loop. Using the getFieldValue-function:

    Do Until rs.EOF
        Set ListItm = QueryResults.ListItems.Add(getFieldValue(rs(1).Value))
        For Count = 2 To rs.Fields.Count
            ListItm.ListSubItems.Add Text:=getFieldValue(rs(Count).Value)
        Nex
        rs.MoveNext
    Loop

Source https://stackoverflow.com/questions/67072643

QUESTION

Setting data in state not working in Vue 3 with Vuex 4

Asked 2021-Jun-15 at 14:29

I'm learning Vue 3 with Vuex 4 and I'm stucked with something that I'm pretty sure it's simple but I can't see.

In few words, i'm trying to set some data in state to have it available to use it in my components but it isn't working.

Let me show you the code:

/// store.js

import { createStore } from 'vuex';
import axios from 'axios';

const store = createStore({
  state: {
    user: {},
    products: []
  },
  mutations: {
    SET_USER: (state, user) => {
      state.user = user;
    },
    SET_PRODUCTS: (state, products) => {
      state.products = products;
    },
  },
  actions: {
    GET_USER: async function ({ commit }) {
      const user = await axios.get('https://coding-challenge-api.aerolab.co/user/me')
      commit('SET_USER', user)
    },
    GET_PRODUCTS: async function ({ commit }) {
      const products = await axios.get('https://coding-challenge-api.aerolab.co/products')
      commit('SET_PRODUCTS', products)
    },
  }
})

export default store;

/// MyComponent.vue

<template>
  <div class='bg-aerolab-main'>
    {{ user }} {{ productsTest }}
  </div>
</template>

import { computed } from "vue";
import { useStore } from 'vuex';

export default {
  setup() {
    const store = useStore();
    const user = computed(() => store.state.user);
    const productsTest = computed(() => store.state.products);
    console.log(user);
    console.log(productsTest);

    return {
      user,
      productsTest
    };
  }
}

/// main.js

import { createApp } from 'vue'
import App from './App.vue'
import './index.css'
import axios from 'axios'
import VueAxios from 'vue-axios';
import store from './store';

const app = createApp(App)
  app.use(VueAxios, axios)
  app.use(store)
  app.mount('#app')

Of course the {{ users }} and {{ productsTest }} bindings are not displaying any data aswell as both console.logs.

PD: I've tried to fetch the data directly in my component and it's working so it's not something related to the data fetched from the API.

Any advices will be truly aprecciated.

Thank you in advance!

ANSWER

Answered 2021-Mar-28 at 20:16

You've to dispatch that actions inside mounted hook :

import { computed , onMounted} from "vue";
import { useStore } from 'vuex';

export default{
  setup() {
    const store = useStore();
    const user = computed(() => store.state.user);
    const productsTest = computed(() => store.state.products);
   
  onMounted(()=>{
    store.dispatch('GET_USER');
    store.dispatch('GET_PRODUCTS');
  })
    return {
      user,
      productsTest
    };
  }
}

Source https://stackoverflow.com/questions/66845766

QUESTION

How to create a working VHDX in Azure CI Build Pipeline?

Asked 2021-Jun-15 at 14:26

This question is related to Azure MSIX Build and Package task only has Release and Debug configurations

We have a WinForms project that has an MSIX installer. Manually, we can successfully create

An MSIXBUNDLE and deploy it to Kudu
An MSIX and deploy it to an Azure VM through a VHDX. We have manually convert the MSIX to a VHDX first

We are now trying to automate the build and release process to create the VHDX. However, we are getting a blank screen when the VHDX is mounted using a process that we have already validated. The only thing different is the build method (i.e., MSBuild versus VS Publish).

How do we create a working VHDX in Azure CI Build Pipeline?

Below is the YAML.

pool: 
  vmImage: windows-2019
  
variables:
- name: solution
  value: 'ProjectName.sln'
- name: buildPlatform
  value: 'x64'
- name: buildConfiguration
  value: 'development'
- name: major
  value: 1
- name: minor
  value: 0
- name: build
  value: 0
- name: revision
  value: $[counter('rev', 0)]  
- name: vhdxSize
  value: '200'
- group: 'legacy-pipeline'
- name: signingCertPwd
  value: $[variables.SigningCertPassword]
  
steps:
- powershell: |
     # Update appxmanifest. This must be done before the build.
     [xml]$manifest= get-content ".\ProjectName.MsixInstaller\Package.appxmanifest"
     $manifest.Package.Identity.Version = "$(major).$(minor).$(build).$(revision)"    
     $manifest.save("ProjectName.MsixInstaller/Package.appxmanifest")
  displayName: 'Version Package Manifest'
  
- task: NuGetToolInstaller@1
  inputs:
    versionSpec: '5.9.1'
    checkLatest: true
  
- task: NuGetCommand@2
  inputs:
    command: 'restore'
    restoreSolution: $(solution)
    feedsToUse: 'select'
  
- task: MSBuild@1
  inputs:
    solution: ProjectName.MsixInstaller/ProjectName.MsixInstaller.wapproj
    platform: $(buildPlatform)
    configuration: $(buildConfiguration)
    msbuildArguments: '/p:OutputPath=NonPackagedApp
     /p:UapAppxPackageBuildMode=SideLoadOnly  /p:AppxBundle=Never /p:AppxPackageOutput=$(Build.ArtifactStagingDirectory)\ProjectName.msix /p:AppxPackageSigningEnabled=false'
  displayName: 'Package the App'
  
- task: MsixSigning@1
  inputs:
    package: '$(Build.ArtifactStagingDirectory)\**\*.msix*'
    certificate: 'Accumatch.DeveloperCodeSigningCert_TemporaryKey.pfx'
    passwordVariable: signingCertPwd
  
- task: AppInstallerFile@1
  inputs:
    package: '$(Build.ArtifactStagingDirectory)\ProjectName.msix'
    outputPath: '$(Build.ArtifactStagingDirectory)\ProjectName.appinstaller'
    method: 'create'
    fileVersion: '1.0.0.0'
    uri: 'https://ProjectNamedemo.azurewebsites.net/ProjectName.appinstaller'
    mainItemUri: 'https://ProjectNamedemo.azurewebsites.net/ProjectName.msix'
    showPromptWhenUpdating: true
    updateBlocksActivation: true
  
- task: MsixAppAttach@1
  inputs:
    package: '$(Build.ArtifactStagingDirectory)\ProjectName.msix'
    vhdxOutputPath: '$(Build.ArtifactStagingDirectory)\ProjectName.vhdx'
    vhdxSize: $(vhdxSize)
  
- task: PublishBuildArtifacts@1
  inputs:
    PathtoPublish: '$(Build.ArtifactStagingDirectory)'
    ArtifactName: 'drop'
    publishLocation: 'Container'

ANSWER

Answered 2021-Jun-15 at 14:26

Actually, there is nothing wrong with the YAML. The problem was a delay in the virtual machine loading the VHDX. In other words, wait about 5 minutes once the VHDX is mounted before trying to run the application. I am leaving this here in case anyone else runs into this issue.

Source https://stackoverflow.com/questions/67943648

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install related

Assuming you already have Redis installed:. Or add the gem to your Gemfile. If you are using Rails, add the above to an initializer. If Redis is running on localhost and on the default port the second line is not needed.
It is easy to use Related in a distributed cluster setup. As of writing this (November 2011) Redis Cluster is not yet ready for production use, but is expected for Redis 3.0 sometime in 2012. Redis Cluster will then be the preferred solution as it will allow you to setup up a dynamic cluster that can re-configure on the fly. If you don’t need to add or remove machines for the cluster you can still use Related in a distributed setup right now using the consistent hashing client Redis::Distributed which is included in the "redis" gem. The regular expression supplied in the :tag option tells Redis::Distributed how to distribute keys between the different machines. The regexp in the example is the recommended way of setting it up as it will partition the key space based on the Related ID part of the key, in effect localizing all data directly related to a specific node on a single machine. This is generally good both for reliability (if a machine goes down, it only takes down a part of the graph) and speed (set operations on relationships originating from the same node can be done on the server side, which is a lot faster, for example). You could also specify a regexp like /:(n|r):/ that will locate all relationships on the same machine, making set operations on relationships a lot faster overall. But with the obvious drawback that the total size of your graph will be limited by that single machine.