[javascript] Copying an array of objects into another array in javascript

There are two important notes.

  1. Using array.concat() does not work using Angular 1.4.4 and jQuery 3.2.1 (this is my environment).
  2. The array.slice(0) is an object. So if you do something like newArray1 = oldArray.slice(0); newArray2 = oldArray.slice(0), the two new arrays will reference to just 1 array and changing one will affect the other.

Alternatively, using newArray1 = JSON.parse(JSON.stringify(old array)) will only copy the value, thus it creates a new array each time.

Examples related to javascript

need to add a class to an element How to make a variable accessible outside a function? Hide Signs that Meteor.js was Used How to create a showdown.js markdown extension Please help me convert this script to a simple image slider Highlight Anchor Links when user manually scrolls? Summing radio input values How to execute an action before close metro app WinJS javascript, for loop defines a dynamic variable name Getting all files in directory with ajax

Examples related to arrays

PHP array value passes to next row Use NSInteger as array index How do I show a message in the foreach loop? Objects are not valid as a React child. If you meant to render a collection of children, use an array instead Iterating over arrays in Python 3 Best way to "push" into C# array Sort Array of object by object field in Angular 6 Checking for duplicate strings in JavaScript array what does numpy ndarray shape do? How to round a numpy array?

Examples related to deep-copy

Why and when to use angular.copy? (Deep Copy) How to deep copy a list? Copying an array of objects into another array in javascript How create a new deep copy (clone) of a List<T>? How to make a deep copy of Java ArrayList How do I copy a hash in Ruby? How do I clone a range of array elements to a new array? How to clone ArrayList and also clone its contents? What is the difference between a deep copy and a shallow copy?