Converting Array of Objects into Array of Arrays

Question

There is a condition where i need to convert Array of objects into Array of Arrays.

Example :-

arrayTest = arrayTest[10 objects inside this array]

single object has multiple properties which I add dynamically so I don't know the property name.

Now I want to convert this Array of objects into Array of Arrays.

P.S. If I know the property name of object then I am able to convert it. But i want to do dynamically.

Example (If I know the property name(firstName and lastName are property name))

var outputData = [];
for(var i = 0; i < inputData.length; i++) {
    var input = inputData[i];
    outputData.push([input.firstName, input.lastName]);
}

Alex · Accepted Answer · 2016-10-25 11:36:43Z

35

Converts Array of objects into Array of Arrays:

var outputData = inputData.map( Object.values );

answered Oct 25, 2016 at 11:36

Alex

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1 Comment

FreeSoftwareServers Over a year ago

Only thing, I had to collect keys from obj and then added using unshift to insert into first position! Otherwise, perfect oneliner!

sabof · Accepted Answer · 2014-03-18 11:19:58Z

24

Try this:

var output = input.map(function(obj) {
  return Object.keys(obj).sort().map(function(key) { 
    return obj[key];
  });
});

edited Mar 18, 2014 at 11:19

answered Mar 18, 2014 at 11:14

sabof

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5 Comments

KiddoDeveloper Over a year ago

Thank you Sabof. I got it what i wanted. Actually I am working on a jQuery Datatable so for your help i get the data. Now i need Property name for Datatable columns heading. Can you tell me how i can get single object's property name??

sabof Over a year ago

@user3292436 Just use this bit: Object.keys(obj).sort()

KiddoDeveloper Over a year ago

hi Sabof. I solved my problem but i couldn't understand the logic behind of MAP method. I have searched on google and found some answer (Its return an array and etc.) but couldn't understand. Can you please explain??

sabof Over a year ago

@Mohit map creates a new array, where each item is the result of function applied to an item in the original array

Alexis.Rolland Over a year ago

Hi @sabof, is the sort important here? Can I skip it if I don't want to alter the order of my values?

matewka · Accepted Answer · 2014-03-18 11:16:10Z

0

Use the for-in loop

var outputData = [];
for (var i in singleObject) {
    // i is the property name
    outputData.push(singleObject[i]);
}

answered Mar 18, 2014 at 11:16

matewka

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