levelup | A wrapper abstract-leveldown compliant stores | Runtime Evironment library

by Level JavaScript Version: 4.4.0 License: MIT

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | levelup Summary

levelup is a JavaScript library typically used in Server, Runtime Evironment, Nodejs applications. levelup has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can install using 'npm i levelup' or download it from GitHub, npm.

LevelDB is a simple key-value store built by Google. It's used in Google Chrome and many other products. LevelDB supports arbitrary byte arrays as both keys and values, singular get, put and delete operations, batched put and delete, bi-directional iterators and simple compression using the very fast Snappy algorithm. LevelDB stores entries sorted lexicographically by keys. This makes the streaming interface of levelup - which exposes LevelDB iterators as Readable Streams - a very powerful query mechanism. The most common store is leveldown which provides a pure C++ binding to LevelDB. Many alternative stores are available such as level.js in the browser or memdown for an in-memory store. They typically support strings and Buffers for both keys and values. For a richer set of data types you can wrap the store with encoding-down. The level package is the recommended way to get started. It conveniently bundles levelup, leveldown and encoding-down. Its main export is levelup - i.e. you can do var db = require('level').

Support

Quality

Security

License

Reuse

Support

levelup has a medium active ecosystem.

It has 4053 star(s) with 294 fork(s). There are 93 watchers for this library.

There were 1 major release(s) in the last 12 months.

There are 0 open issues and 382 have been closed. On average issues are closed in 263 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of levelup is 4.4.0

Quality

levelup has 0 bugs and 0 code smells.

Security

levelup has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

levelup code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

levelup is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

levelup releases are available to install and integrate.

Deployable package is available in npm.

Installation instructions are not available. Examples and code snippets are available.

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levelup Key Features

No Key Features are available at this moment for levelup.

levelup Examples and Code Snippets

encoding-down,Usage

JavaScript

Lines of Code : 52

License : Permissive (MIT)

Copy

const levelup = require('levelup')
const leveldown = require('leveldown')
const encode = require('encoding-down')

const db = levelup(encode(leveldown('./db1')))

db.put('example', Buffer.from('encoding-down'), function (err) {
  db.get('example', fu

level-couch-sync,Usage

JavaScript

Lines of Code : 31

License : No License

Copy

var levelCouchSync = require('level-couch-sync')
var levelup = require('levelup')
var sublevel = require('level-sublevel')

var db = sublevel(levelup('/tmp/level-npm'))
levelCouchSync('http://isaacs.iriscouch.com/registry', db, 'registry-sync')

var

SublevelUP,Encoding

JavaScript

Lines of Code : 31

License : Permissive (MIT)

Copy

var level = require('level')
var sublevel = require('sublevelup')

//Key-prefix: passing LevelUP to Sublevel
var subdb = sublevel(level('./db'))

var hello = sublevel(subdb, 'hello')
var foo = db.sublevel('foo')
var fooBar = sublevel(foo, 'bar')
var

Community Discussions

Trending Discussions on levelup

Why Do I Keep Receiving an Access Violation Exception?

AWS Cloudfront serving javascript modules as wrong MIME type( "Text/Plain")

Azure Function App using python: How to access user groups for authorization

How to change style of embdeded HTML in a PHP file?

Calling all scripts with the Interface, not just a single one

Query a column with jsonb data meeting certain criteria

Should I upcast before calling an inherited method

How to kern text in PIL

Not able to write data into a leveldb file using batch

Conditional nested array element in TypeScript

QUESTION

Why Do I Keep Receiving an Access Violation Exception?

Asked 2021-Jun-13 at 00:59

I am currently on the path of learning C++ and this is an example program I wrote for the course I'm taking. I know that there are things in here that probably makes your skin crawl if you're experienced in C/C++, heck the program isn't even finished, but I mainly need to know why I keep receiving this error after I enter my name: Exception thrown at 0x79FE395E (vcruntime140d.dll) in Learn.exe: 0xC0000005: Access violation reading location 0xCCCCCCCC. I know there is something wrong with the constructors and initializations of the member variables of the classes but I cannot pinpoint the problem, even with the debugger. I am running this in Visual Studio and it does initially run, but I realized it does not compile with GCC. Feel free to leave some code suggestions, but my main goal is to figure out the program-breaking issue.

...

ANSWER

Answered 2021-Jun-13 at 00:59

The problem is here:

Source https://stackoverflow.com/questions/67953979

QUESTION

AWS Cloudfront serving javascript modules as wrong MIME type( "Text/Plain")

Asked 2021-Jun-11 at 15:13

I have a Vue app hosted on an Amazon S3 bucket. It is loading great when accessed via the S3 link w/http. When I visit the site via a custom SSL domain link to cloudfront the javascript isn't served correctly. the JS files are fully accessible via https in the browser, but don't execute in the browser, leaving me with a blank page. I'm getting the following error for both javascript links in the index.html:

Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/plain". Strict MIME type checking is enforced for module scripts per HTML spec.

also: I was following the instructions here: https://levelup.gitconnected.com/deploying-vue-js-to-aws-with-https-and-a-custom-domain-name-3ae1f79fe188

...

ANSWER

Answered 2021-Jun-11 at 15:13

Figured it out, I just had to manually change the system-defined content type in the S3 console for the individual js objects from text/plain to application/javascript, then make sure the cache was invalidated and refreshed on my browser.

Source https://stackoverflow.com/questions/67925203

QUESTION

Azure Function App using python: How to access user groups for authorization

Asked 2021-Jun-10 at 03:48

I am very new to Azure Function Apps and OAuth so please bear with me.

My Setup

I have an Azure Function App with a simple python-function doing nothing else but printing out the request headers:

...

ANSWER

Answered 2021-Jun-10 at 03:48

The header X-MS-CLIENT-PRINCIPAL contains the same claims as the id_token. So if we want to get the group claim, we can base64 decode the header.

For example

My code

Source https://stackoverflow.com/questions/67900664

QUESTION

How to change style of embdeded HTML in a PHP file?

Asked 2021-May-14 at 16:00

So i am currently on 14 day internship and my job is to redesign a webpages, however these webapges are made so they display links to a files in a folder and once you click on these files you download them.

My question is -> there a way of how I can change the style of this page with an external CSS file ? My problem is I don't know PHP at all and don't have time to learn it, so I don't know what these files exactly do, but I know that at the botom there is HTML code being passed on the site, I tried changing the CSS file in the HTML , but it didn't change anything and this is how the page was displayed.

This is the link to the image: https://imgur.com/skjQEk6

And this is the code that was located in the same folder as the .xls files

I am sorry for long code, I don't know how to shorten it.

...

ANSWER

Answered 2021-May-14 at 16:00

You use double quote(") inside double quote

You must have to use single quote(') inside double quote(")

So your code should be...

Source https://stackoverflow.com/questions/67506120

QUESTION

Calling all scripts with the Interface, not just a single one

Asked 2021-May-10 at 15:01

I have a few scripts which all inherit from an Interface I have called IPlayer. The goal of this interface is to register Damage, Experience, and LevelUp.

...

ANSWER

Answered 2021-May-10 at 15:01

use foreachmethod.

Source https://stackoverflow.com/questions/67472021

QUESTION

Query a column with jsonb data meeting certain criteria

Asked 2021-May-03 at 21:01

Problem

I have a table like this:

product tags (jsonb) P001 [{"name": "LX","active": true}, {"name": "TX","active": true}] P002 [{"name": "LX","active": true}]

I am trying to query against this table to get a list of products with tags that are the same.

I found the following to be insufficient for my query since it will match all products with at least the tag I query for:

...

ANSWER

Answered 2021-May-03 at 21:01

Base on the example you give, you can use simultaneous containment in both directions.

Source https://stackoverflow.com/questions/67374903

QUESTION

Should I upcast before calling an inherited method

Asked 2021-Apr-28 at 23:48

I am probably doing something way wrong here, but I have a Base class with multiple derived classes.

...

ANSWER

Answered 2021-Apr-28 at 23:48

In C# you can use virtual keyword (also there is abstract modifier in case you don't want to have any default implemenation) for polymorphism:

Source https://stackoverflow.com/questions/67309133

QUESTION

How to kern text in PIL

Asked 2021-Apr-20 at 15:00

I'm working on a problem that requires good precision pixel by pixel, so I need to have the ability to manipulate text in more ways than what PIL provides. Especially with regard to kerning. There is a feature that allows you to disable kerning, but not control the amount.

This problem was made more challenging because of bugs in PIL that relate to accurately measuring the size of text. There are many posts about this problem but the most useful information is a SO post here, How to get the font pixel height using PIL's ImageFont class? and a blog article, How to properly calculate text size in PIL images

...

ANSWER

Answered 2021-Apr-20 at 15:00

My code is for my own use but if someone is having similar issues, I'm sure that it can easily be adapted for your own needs.

My key functions are:

Source https://stackoverflow.com/questions/67181454

QUESTION

Not able to write data into a leveldb file using batch

Asked 2021-Apr-17 at 15:11

I just started to learn level.db using the level module in node.js

...

ANSWER

Answered 2021-Apr-17 at 15:11

From the GitHub page of leveldb here, we can see an example :

Source https://stackoverflow.com/questions/67137981

QUESTION

Conditional nested array element in TypeScript

Asked 2021-Apr-09 at 04:35

Here is the function that simplifies the formatting of console outputs:

...

ANSWER

Answered 2021-Apr-09 at 04:35

Problem

In the expression ...mockCondition ? [ [ " Teal ", { color: "teal" } ] ] : [], the type inferred for the result of the ternary condition will be (string | { color: string; })[] (a generic, infinite array) instead of [string, { [CSS_Key: string]: string; }] (the tuple type). This is because the expression is not calculated at compile time, so it's resultant type can/doest not be "matched" with function's parameters' types.

Solution

Use type assertion.

Source https://stackoverflow.com/questions/67014853

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

Vulnerabilities

No vulnerabilities reported

Install levelup

You can install using 'npm i levelup' or download it from GitHub, npm.

Support

We aim to support Active LTS and Current Node.js releases as well as browsers. For support of the underlying store, please see the respective documentation.

Find more information at: