JS - Array to Object #Javascript

JS-array-to-obj.js

//From https://stackoverflow.com/questions/4215737/convert-array-to-object

//Given the following array:

var testArray = ["a","b","c","d"]


//Simplest data transformation method:
function toObject(arr) {
  var rv = {};
  for (var i = 0; i < arr.length; ++i)
    rv[i] = arr[i];
  return rv;
}


//Method which has built-in "hole" removal (tests for invalid values in the array)
function toObject(arr) {
  var rv = {};
  for (var i = 0; i < arr.length; ++i)
    if (arr[i] !== undefined) rv[i] = arr[i];
  return rv;
}



//Alternativly using Array.reduce method on instanciation, invalid values may be trimmed like this:
var obj = arr.reduce(function(acc, cur, i) {
  acc[i] = cur;
  return acc;
}, {});