Javascript make an object from array of strings

Question

I have an array like this: var arr = ["1:a", "2:b", "3:c"];

From above array I want an object: var obj = { "1": "a", "2": "b", "3": "c" }

I am doing:

  var obj = {}
    $.each(arr, function (i, value) {
        var valueSplit = value.split(':');
// I don't know how to make the object
    });

Edit: My Question is mark as duplicate, while the question I asked is totally opposite of the marked duplicate question.

David Hedlund · Accepted Answer · 2016-05-10 10:00:06Z

2

From your code, in place of the comment you could write

obj[valueSplit[0]] = valueSplit[1];

This could be written as a simple reduce:

var obj = arr.reduce(function(x,y) { return z = y.split(':'), x[z[0]]=z[1], x; }, {});

var arr = ["1:a", "2:b", "3:c"];
var obj = arr.reduce(function(x,y) { return z = y.split(':'), x[z[0]]=z[1], x; }, {});
document.write(JSON.stringify(obj));

answered May 10, 2016 at 10:00

David Hedlund

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1 Comment

evolutionxbox Over a year ago

This would be my preferred approach over using jQuery's $.each.

Nina Scholz · Accepted Answer · 2016-05-10 09:58:55Z

1

Just add the assignment.

var obj = {}
$.each(arr, function (i, value) {
    var valueSplit = value.split(':');
    obj[valueSplit[0]] = valueSplit[1]; 
});

answered May 10, 2016 at 9:58

Nina Scholz

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Comments

gurvinder372 · Accepted Answer · 2016-05-10 09:58:23Z

0

Simply try this

var arr = ["1:a", "2:b", "3:c"];
var map = {};
arr.forEach( function(val){ 
   var keyVal = val.split( ":" ); 
   map[ keyVal[ 0 ] ] = keyVal[ 1 ];
});

map is the object you are looking for.

DEMO

var arr = ["1:a", "2:b", "3:c"];
var map = {};
arr.forEach( function(val){ 
   var keyVal = val.split( ":" ); 
   map[ keyVal[ 0 ] ] = keyVal[ 1 ];
});

document.body.innerHTML += JSON.stringify( map, 0, 4 );

answered May 10, 2016 at 9:58

gurvinder372

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