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I want to create a JavaScript object dynamically from two arrays of strings. One array is used for the key and another for the value. e.g. it should create *element.name="xyz";*etc

 var key=["name","id","surname"];
 var value=[["xyz","01","abc"],["def","02","ghi"]]; 
 var element=new Object();

from the above value it should create an object like this:

    var element=new Object();
    element.name="xyz";
    element.id="01";
    element.surname="abc";

    var element =new Object();
    element.name="def";
    element.id="02";
    element.surname="ghi";
share|improve this question
 
need more clarification about your needs –  Anup Sep 3 '13 at 11:30
 
Would element be an object or an array of objects? because your value object holds an array of 2 "objects" –  simdrouin Sep 3 '13 at 11:36
 
It looks like you are trying to create two objects, or perhaps two objects in an array there. –  Andy Sep 3 '13 at 11:37
 
@simdrouin its an array of objects –  Neerav Shah Sep 3 '13 at 11:37
 
@Andy i want to pass this object to array later –  Neerav Shah Sep 3 '13 at 11:38
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2 Answers

up vote 2 down vote accepted

I would go like this :

var value=[["xyz","01","abc"],["def","02","ghi"]]; // notice it's an array of array instead of an array of objects

var elements = [];

for (var i = 0; i< value.length; i++) {
    var elem = new Object();
    for (var j=0; j< key.length; j++) {
        elem[key[j]] = value[i][j];
    }
    elements.push(elem);
}
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thanks for your ans it really helped –  Neerav Shah Sep 3 '13 at 12:07
 
for sanity: j<key.length && j<value[i].length –  Emissary Sep 3 '13 at 12:09
 
can you help me to solve this problem also stackoverflow.com/q/18584226/2307391 –  Neerav Shah Sep 4 '13 at 4:25
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up vote 0 down vote

Similar to the other answers but avoiding the inner loop:

var keys = ["name","id","surname"];
var values = [["xyz","01","abc"],["def","02","ghi"]]; // an array of arrays, not objects

function populateObjects(keys, values) {
  var arr = [];
  for (var i = 0, l = values.length; i < l; i++) {
    var obj = {};
    obj[keys[0]] = values[i][0];
    obj[keys[1]] = values[i][1];
    obj[keys[2]] = values[i][2];
    arr.push(obj);
  }
  return arr;   
}

var arr = populateObjects(keys, values);
console.log(arr);
share|improve this answer
 
However, if there is a new property added to the keys/values objects, you need to modify the populateObjects function –  simdrouin Sep 3 '13 at 11:54
 
Fair point. Question didn't mention that tho. It indicated the objects would be static. –  Andy Sep 3 '13 at 11:59
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