jsshorts's Introduction

jsshorts

About

This is a Node.js module available through the npm registry.

This module provides a couple of shortcuts for commonly used javascript constructs

Installation

$ npm install jsshorts

Features

Run the examples below with runkit: https://npm.runkit.com/jsshorts

`forEach`

Iterates over properties of an object.

const forEach = require('jsshorts').forEach;

const obj = { a: '23', b: 'bla' };
forEach(obj, (k,v) => {
   console.log(`${k} : ${v}`);
});

`containsProperty`

Checks if an object contains a property

const containsProperty = require('jsshorts').containsProperty;

const obj = { a: '23', b: 'bla' };
console.log(`${containsProperty(obj, 'a')}`);
console.log(`${containsProperty(obj, 'c')}`);

`deepCopy`

Deeps copy an object. It uses JSON serialization under the hood: JSON.parse(JSON.stringify(a));

usage 1: to = deepCopy(from) creates new deep copied object

const deepCopy = require('jsshorts').deepCopy;
const from = { a: 'v1', b: 'v2', c: { x: '123', y: '345' } };

const to = deepCopy(from);
from.a = 'x'; // modify object, that does not influence 'to' 
console.log(`${JSON.stringify(from)}`);
console.log(`${JSON.stringify(to)}`);

usage 2: deepCopy(from, to) deeply copies properties of 'from' object into 'to' object

const deepCopy = require('jsshorts').deepCopy;

const from = { a: 'aaa' };
const to = { b: 'bbb' };
deepCopy(from, to);
console.log(`${JSON.stringify(to)}`); // to contains a and b

`removePropertiesNotInFilter`

Removes properties from 'from' object when property not in 'filter' object

const obj = {
  a: 'v1', b: 'v2', c: 'v3', d: 'v4',
};
const filter = { b: 'cc', c: 'dd' };
removePropertiesNotInFilter(obj, filter);
console.log(`${JSON.stringify(obj)}`); // a and d are removed

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