Change the string of the 'key' in array javascript

Question

This is my array

[
  {    
    "id": 2,
    "language": {
      "name": "English",
      "abbreviation": "EN"
  }
]

To access language.name

function get(arrName)
{
    for(var k = 0 ; k< arr.length; k++)
    {
        console.log(arr[k].language.name); //English
    }
}

In arr[k].language.name, i want to put 'language' string as dynamic, which i am getting it from the params of the function arrName. So that it should be

function get(arrName)
{
    for(var k = 0 ; k< arr.length; k++)
    {
        var dynamicArr = '.'+arrName+'.name';
        console.log(arr[k]+dynamicArr);
    }
}

Here it is displaying

[object Object].language.name;

How to get actual array value?

Jonathan's answer is what you would like, but to explain your problem, you are attempting to log the value of `arr[k]` plus `dynamicArr` instead of the actual array position. — Thomas Juranek, Jan 10 '17 at 05:53
Use associative array inside the loop `console.log(arr[k][dynamicArr].name);` — SASIKUMAR SENTHILNATHAN, Jan 10 '17 at 05:53

score 5 · Accepted Answer · answered Jan 10 '17 at 05:52

5

You need to access the object property the same way you would with an array, only using the string as the key. Like so:

function get(arrName)
{
    for(var k = 0 ; k< arr.length; k++)
    {
        console.log(arr[k][arrName].name);
    }
}

answered Jan 10 '17 at 05:52

Jonathan Gray

2,509
15
20

score 2 · Answer 2 · edited May 23 '17 at 12:07

2

console.log(arr[k][arrName].name);

It should be, if I recall properly.

Feel free to take a look at this dynamic access to an array in Javascript for an extensive, iterating code.

Kudos on what you made so far, though.

edited May 23 '17 at 12:07

Community

1
1

answered Jan 10 '17 at 05:51

netpeers

56
4

Change the string of the 'key' in array javascript

2 Answers2