relate | experimenting React + GraphQL + Next.js web app | GraphQL library
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[ARCHIVED] experimenting React + GraphQL + Next.js web app on the theme of mindfulness
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QUESTION
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).
...ANSWER
Answered 2021-Jun-16 at 02:49You 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.
QUESTION
Suppose I have a Pandas dataframe with two identifier columns like this:
...ANSWER
Answered 2021-Jun-15 at 20:56Sounds like a network issue, try with networkx
QUESTION
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:
...ANSWER
Answered 2021-Jun-15 at 20:17Tesseract 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 isfont 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
.
QUESTION
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
Super hyggelig aften :)
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 11:20Your problem is that you use async
in a foreEach
loop here:
QUESTION
i have a map like this:
...ANSWER
Answered 2021-Jun-15 at 19:06ListView 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
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:
QUESTION
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:
...ANSWER
Answered 2021-Apr-13 at 10:28If 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):
QUESTION
Context: I am creating a Django management command which will accept a positional argument. This argument is a location. My goal is to use the location value to refer to a corresponding variable.
I have a global variable named Boston_webhook
. This is a simple string which contains a long URL which is just a MSteams webhook...
I have an additional global variable named Budapest_webhook
which contains the same data type, but instead refers to a webhook related to the Budapest location.
In my script, a connector variable has to be defined in order to send the message to the correct place.
...ANSWER
Answered 2021-Jun-15 at 17:01Use dictionary to map names of webhooks to webhooks itself - like this
QUESTION
Hi I am looking for help to study pre-existing models that are IoT based but has applications such as radio frequency identification, emergency related, and some form of access control, a paper in that area is ideal. Thanks in advance!
...ANSWER
Answered 2021-Jun-15 at 15:56Please try to have more details in your questions, an example of what the framework is, I have published previously a framework in IoT Emergency System that was based on a disaster. The Doc will help you research your topic better as it is based on a framework design, a prototype is developed using an RFID access control and a drone system. We also incorporate design specifications that minimize the risk of data and privacy breaches. DOI
QUESTION
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
...ANSWER
Answered 2021-Mar-28 at 20:16You've to dispatch that actions inside mounted hook :
QUESTION
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.
...ANSWER
Answered 2021-Jun-15 at 14:26Actually, 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
.
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