Pairing key / values arrays

Question

Pairing key / values arrays

Consider two arrays. One with keys. The other with values.

Output is an object made of key/value pairs.

Is there better(performance) method to do this than:

var keys = ["some", "key", "foo", "bar"];
var values = ["this", "are", "values", "dude"];

var result = { };

for(var i = 0, len = keys.length; i < len; i++) {
  result[keys[i]] = values[i];
}

console.log(result);

javascript
node.js

Answer 1

You can use indexOf method of array to get corresponding value from second array eg. for key 'foo', value = values[keys.indexOf('foo')];

var keys = ["some", "key", "foo", "bar"],
values = ["this", "are", "values", "dude"],
key = 'foo',
value =  values[keys.indexOf('foo')];

Answer 2

http://underscorejs.org used for the following

_.object(keys, values)

O(N) complexity for the build, O(1) complexity for the retrieval.. I don't believe that you can beat that if retrieval is your goal.