Sorting an array of object depending on another array

Question

I have two arrays like these:

objects = [Obj1, Obj2, Obj3];
scores  = [10,200,15];

with objects[i] corresponding to its score in scores[i].

I need to sort the objects array in a descending order, depending on their relative scores.

Any idea how to do that efficiently in jQuery/javascript ? Thank you for your help !

It would probably be better to join them together as a single object and then sort them. — Rory McCrossan
– Rory McCrossan, Commented Jan 3, 2015 at 15:54
Wouldn't it be easier to keep the scores as a property of the object it belongs to ? — adeneo
– adeneo, Commented Jan 3, 2015 at 16:08

JLRishe · Accepted Answer · 2015-01-03 16:06:55Z

2

As @Rory McCrossan suggests, probably the best approach is to join the values together and then separate them afterward if desired:

// produces [{score: 10,  value: Obj1}, 
//           {score: 200, value: Obj2},
//           {score: 15,  value: Obj3}]
var joined = objects.map(function (el, i) {
    return { score: scores[i], value: el };
});

// rearranges joined array to:
//          [{score: 200, value: Obj2},
//           {score: 15,  value: Obj3},
//           {score: 10,  value: Obj1}]
joined.sort(function (l, r) { return r.score - l.score; });

// produces [Obj2, Obj3, Obj1]
var sorted = joined.map(function (el) { return el.value; });

answered Jan 3, 2015 at 16:06

JLRishe

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