JavaScript push to array

Question

How do I push new values to the following array   json     cool   34 33   alsocool   45454     I tried json push  coolness   34 33     but it didn t work

User · Answer

That is an object  not an array  So you would do   var json     cool  34 33  alsocool  45454    json supercool   3 14159  console dir json

User · Answer

Use the push   function to append to an array      initialize array var arr          Hi        Hello        Bonjour         append new value to the array arr push  Hola      Now array is  var arr          Hi        Hello        Bonjour       Hola            append multiple values to the array arr push  Salut    Hey      Now array is  var arr          Hi        Hello        Bonjour       Hola       Salut       Hey            display all values for  var i   0  i  lt  arr length  i          console log arr i        Will print   Hi Hello Bonjour Hola  Salut Hey   Update  If you want to add the items of one array to another array  you can use Array concat   var arr          apple        banana        cherry      arr   arr concat        dragonfruit        elderberry        fig          console log arr     Will print    apple    banana    cherry    dragonfruit    elderberry    fig

User · Answer

object  property     value    or  object property   value    Object and Array in JavaScript are different in terms of usage   Its best if you understand them     Object vs Array  JavaScript

User · Answer

var array   new Array       or the shortcut       array push     cool   34 33   also cool   45454      array push      cool   34 39   also cool   45459        Your variable is a javascript object    not an array      You could do   var o          or the longer form    new Object   o SomeNewProperty    something   o  SomeNewProperty      something     and  var o     SomeNewProperty   something     var o2      SomeNewProperty    something       Later  you add those objects to your array  array push  o  o2    Also JSON is simply a string representation of a javascript object  thus   var json      cool   34 33   alsocool   45454        is JSON var o   JSON parse json      is a javascript object json   JSON stringify o      is JSON again

User · Answer

It s not an array   var json     cool   34 33   alsocool   45454    json coolness   34 33    or  var json     cool   34 33   alsocool   45454    json  coolness     34 33    you could do it as an array  but it would be a different syntax  and this is almost certainly not what you want   var json      cool   34 33     alsocool   45454     json push   coolness   34 33       Note that this variable name is highly misleading  as there is no JSON here  I would name it something else

[javascript] JavaScript push to array

Examples related to javascript

Examples related to arrays

Examples related to json

Examples related to multidimensional-array