Javascript Array getIndexBy(name, value)

Array.prototype.getIndexBy = function (name, value) {
    for (var i = 0; i < this.length; i++) {
        if (this[i][name] == value) {
            return i;
        }/*from www . j a  v a  2  s.co  m*/
    }
    return -1;
}

'use strict';/*from w ww  .  ja  va  2 s  .c  o  m*/

Array.prototype.getIndexBy = function (name, value) {
  for (var i = 0; i < this.length; i++) {
    if (this[i][name] === value) {
      return i;
    }
  }
};