What is appropriate way to generate hash in JavaScript having values as array

Question

I wanted to generate dictionary like below

a = {'A' => [1,2,3], 'B' => [12,13], 'C' => [32,432]}

var h = {}
gen_h(['A', 1])
gen_h(['A', 2])
gen_h(['B', 13])
gen_h(['C', 32])
gen_h(['C', 432])

should give h value as -

h = {'A' => [1,2], 'B' => [13], 'C' => [32,432]}

function gen_h(['A', 1])? Shouldn't this just be gen_h(['A', 1])? — gen_Eric
– gen_Eric, Commented Mar 9, 2012 at 19:31
Did you mean generating an object instead of generating hash? I would call a hash something generated by a hash function, like MD5. Also, what has a to do with all of this? — Felix Kling
– Felix Kling, Commented Mar 9, 2012 at 20:19
@FelixKling.. Sorry but i am looking for key value pair hash not MD5 hash — Sandip Ransing
– Sandip Ransing, Commented Mar 9, 2012 at 20:30

gen_Eric · Accepted Answer · 2012-03-09 19:34:17Z

1

This is just normal JavaScript, nothing to do with jQuery.

function gen_h(data){
    var key = data[0], // key
        val = data[1]; // value
    if(!h[key]){       // does hash exist?
        h[key] = [];
    }
    h[key].push(val);  // add value
}

Then you can do:

var h = {};
gen_h(['A', 1]);
gen_h(['A', 2]);
gen_h(['B', 13]);
gen_h(['C', 32]);
gen_h(['C', 432]);

answered Mar 9, 2012 at 19:34

gen_Eric

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