Deno Based JSON Format DB

Deno JSON DB

A simple DB based on Deno.

Notes

This module is a work in progress.
We are working on a pilot implementation of a module like NeDB.

If the feature you need is not present in the “Upcoming features”, please let us know what you want in Issue.

Feature

  • Deno Modules
  • Save in JSON format
  • The storage formats are in-memory and file

Upcoming features

  • [x] Write data
  • [x] Delete the specified data
  • [x] Return data that matches the condition
  • [x] Save the data as a file
  • [x] Asynchronous support
  • [ ] Partial search with regular expressions

API

When creating a file, you must add --allow-read and --allow-write at execution to read and write the file.

Create DB

The first argument is the DB type. If it is “file”, it is a file; if it is “memory”, it is managed in-memory.
The second argument is the DB path. If it is “file”, it will be an error if it is not written.

import { SimpleDB } from 'https://github.com/windchime-yk/deno-simple-db/raw/master/mod.ts'

interface DB {
  _id: string,
  name?: string
}

const db = new SimpleDB<DB>({
  type: 'file',
  folder: './db/',
})

Add an Object to the DB

The first argument is the Object to add to the DB.
The second argument is the key used in the duplication prevention process.

import { v4 } from 'https://deno.land/std@0.77.0/uuid/mod.ts';

const test = {
  _id: v4.generate(),
  name: 'Asomaka Toika'
}

await db.add(test, 'name')

Remove matching objects from DB

The first argument is the key, and the second argument is the value of the key.

await db.delete('name', 'Asomaka Toika')

Searching the DB

Returns an Object that matches the conditions, with the name of the key as the first argument and the value of the key as the second argument.
No arguments return all DB data.

const data = await db.find('name', 'Asomaka Toika')
const dataAll = await db.find()

Test

Execute the following command.

$ git clone git@github.com:windchime-yk/deno-simple-db.git
$ cd path/to/deno-simple-db

# If there is no Denon
$ deno run --allow-write --allow-read test.ts
# If you have a Denon
$ denon test

On translation

I am using “DeepL Translation” to translate this README.

Download Details:

Author: windchime-yk

Source Code: https://github.com/windchime-yk/deno-json-db

#deno #nodejs #node #javascript #json

What is GEEK

Buddha Community

Deno Based JSON Format DB
Brandon  Adams

Brandon Adams

1625637060

What is JSON? | JSON Objects and JSON Arrays | Working with JSONs Tutorial

In this video, we work with JSONs, which are a common data format for most web services (i.e. APIs). Thank you for watching and happy coding!

Need some new tech gadgets or a new charger? Buy from my Amazon Storefront https://www.amazon.com/shop/blondiebytes

What is an API?
https://youtu.be/T74OdSCBJfw

JSON Google Extension
https://chrome.google.com/webstore/detail/json-formatter/bcjindcccaagfpapjjmafapmmgkkhgoa?hl=en

Endpoint Example
http://maps.googleapis.com/maps/api/geocode/json?address=13+East+60th+Street+New+York,+NY

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#jsons #json arrays #json objects #what is json #jsons tutorial #blondiebytes

Deno Based JSON Format DB

Deno JSON DB

A simple DB based on Deno.

Notes

This module is a work in progress.
We are working on a pilot implementation of a module like NeDB.

If the feature you need is not present in the “Upcoming features”, please let us know what you want in Issue.

Feature

  • Deno Modules
  • Save in JSON format
  • The storage formats are in-memory and file

Upcoming features

  • [x] Write data
  • [x] Delete the specified data
  • [x] Return data that matches the condition
  • [x] Save the data as a file
  • [x] Asynchronous support
  • [ ] Partial search with regular expressions

API

When creating a file, you must add --allow-read and --allow-write at execution to read and write the file.

Create DB

The first argument is the DB type. If it is “file”, it is a file; if it is “memory”, it is managed in-memory.
The second argument is the DB path. If it is “file”, it will be an error if it is not written.

import { SimpleDB } from 'https://github.com/windchime-yk/deno-simple-db/raw/master/mod.ts'

interface DB {
  _id: string,
  name?: string
}

const db = new SimpleDB<DB>({
  type: 'file',
  folder: './db/',
})

Add an Object to the DB

The first argument is the Object to add to the DB.
The second argument is the key used in the duplication prevention process.

import { v4 } from 'https://deno.land/std@0.77.0/uuid/mod.ts';

const test = {
  _id: v4.generate(),
  name: 'Asomaka Toika'
}

await db.add(test, 'name')

Remove matching objects from DB

The first argument is the key, and the second argument is the value of the key.

await db.delete('name', 'Asomaka Toika')

Searching the DB

Returns an Object that matches the conditions, with the name of the key as the first argument and the value of the key as the second argument.
No arguments return all DB data.

const data = await db.find('name', 'Asomaka Toika')
const dataAll = await db.find()

Test

Execute the following command.

$ git clone git@github.com:windchime-yk/deno-simple-db.git
$ cd path/to/deno-simple-db

# If there is no Denon
$ deno run --allow-write --allow-read test.ts
# If you have a Denon
$ denon test

On translation

I am using “DeepL Translation” to translate this README.

Download Details:

Author: windchime-yk

Source Code: https://github.com/windchime-yk/deno-json-db

#deno #nodejs #node #javascript #json

Autumn  Blick

Autumn Blick

1593251880

JSON Parsing in Android - Step by Step Implementation

JSON Structures in Android

JSON uses two types of brackets that are as follows:

  • [] – To declare the elements of Array in JSON, they’re written in square brackets.
  • {} – To create JSON objects, the elements are written in curly brackets.

JSON has the following types of structures that are:

1. JSON Objects

The elements inside the curly brackets are known as Objects.

2. JSON Array

A list of values, known as Arrays.

3. JSON Key-Value

This data is stored as a pair of keys and values. Here the keys can be a name, a number for which the values can be Seema, 98767586 etc.

Why JSON Parsing in Android over XML?

Let us see some reasons for why to choose JSON over XML:

  • It is much easier and quicker with high performance
  • It can use arrays
  • Its libraries do not depend on other libraries
  • The codes written in JSON are short, clean and easy to understand
  • It is free to open use and open-source tool
  • In JSON value retrieval is easy
  • It has a fully automated way of serializing/deserializing JavaScript.
  • It is supported by many Ajax toolkits and most of the backend technologies.

Examples of XML and JSON

Let us see the code difference of JSON and XML files:

XML Example:

<?xml version= “1.0” encoding= “” ?>
<student>
        <student>
  <name> Sia Sharma</name>
  <city> Chandigarh</city>
         </student>
        <student>
  <name>Dimple D’souza</name>
  <city> Nagpur</city>
         </student>
      <student>
  <name>Anna Jones</name>
  <city> Mumbai</city>
         </student>
  </student>

JSON Example:

{ “students”: [
{ “name”: “Sia Sharma”, “city”: “Chandigarh”},
{ “name”: “Prachi D’Souza”, “city”: “Nagpur”},
{ “name”: “Annas Jones”, “city”: “Mumbai”}
]}

I hope the difference is all clear in front of you. This is how simple JSON is and how easily it could be understood.

#android tutorials #json parsing in android #json parsing in android example #json parsing in android step by step #json parsing with android #read json file android

August  Larson

August Larson

1624357980

String Format() Function in Python

To control and handle complex string formatting more efficiently

What is formatting, why is it used?

In python, there are several ways to present output. String formatting using python is one such method where it allows the user to control and handle complex string formatting more efficiently than simply printing space-separated values.There are many types of string formatting, such as padding and alignment, using dictionaries, etc. The usage of formatting techniques is not only subjected to strings. It also formats dates, numbers, signed digits, etc.

Structure of format() method

Let us look at the basic structure of how to write in string format method.

Syntax: ‘String {} value’.format(value)

Let us look at an example:
‘Welcome to the {} world.’.format(“python”)

Here, we have defined a string( ‘’) with a placeholder( {} ) and assigned the argument of the parameter as “python.” On executing the program, the value will be assigned to the placeholder, showing the output as:

#python #programming #string format() function in python #string format() function #format() #format() function

lalit tomar

1598687041

JSON with Python - copyassignment.com

Hello friends, do you want to learn how to use JSON with Python? If Yes, then I recommend you must go to this website as I found this tutorial best to learn everything you need to learn hot to work on JSON with Python.
Link==> https://copyassignment.com/python/json-with-python/

#python #json with python #json #json