javascript | Array conversion

Question

I have an array and would like to convert it to another structure.

My array:

["DZ|47", "DZ|48", "DZ|53", "DZ|57", "AR|202", "AR|206", "AR|213", "BY|484", "BY|485", "BY|487"]

And I would like to convert this into:

{"DZ":[47,48,53,57],"AR":[202,206,213],"BY":[484,485,487]}

I'm started to write the code, but...what next?

$.each(arr, function( index, value ) {
    var idx = value.split('|');
    //arr2[idx[0]] = arr3;
});

Thanks!

SGD · Accepted Answer · 2015-04-01 07:35:49Z

3

var result = {};
$.each(arr, function( index, value ) {
    var idx = value.split('|');
    if(!result[idx[0]]){
        result[idx[0]] = [];
    }
    result[idx[0]].push(idx[1]);
});

answered Apr 1, 2015 at 7:35

SGD

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dfsq · Accepted Answer · 2015-04-01 07:35:09Z

1

You can use Array.prototype.reduce method:

var data = ["DZ|47", "DZ|48", "DZ|53", "DZ|57", "AR|202", "AR|206", "AR|213", "BY|484", "BY|485", "BY|487"];

var result = data.reduce(function(prev, curr) {
    var split = curr.split('|');
    if (!prev[split[0]]) prev[split[0]] = [];
    prev[split[0]].push(split[1]);  
    return prev;
}, {});

alert(JSON.stringify(result));

answered Apr 1, 2015 at 7:35

dfsq

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