underscore lodash native (with polyfill) (v4)

Revision 4 of this benchmark created on September 2, 2014

Description

Preparation HTML

<script>
/**
 * @license
 * Lo-Dash 2.4.1 (Custom Build) lodash.com/license | Underscore.js 1.5.2 underscorejs.org/LICENSE
 * Build: `lodash modern -o ./dist/lodash.js`
 */
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//# sourceMappingURL=underscore-min.map</script>
<script>
  var underscore = _.noConflict();
</script>

Setup

var arr = [1, 2, 3, 'test', 'anotherString', 1, 3, 98, 1, '', undefined, 'bla', 3];

Test runner

underscore.find(arr, function(item) {
  return item === 'bla';
});

lodash.find(arr, function(item) {
  return item === 'bla'
});

if (!Array.prototype.find) {
  Object.defineProperty(Array.prototype, 'find', {
    enumerable: false,
    configurable: true,
    writable: true,
    value: function(predicate) {
      if (this == null) {
        throw new TypeError('Array.prototype.find called on null or undefined');
      }
      if (typeof predicate !== 'function') {
        throw new TypeError('predicate must be a function');
      }
      var list = Object(this);
      var length = list.length >>> 0;
      var thisArg = arguments[1];
      var value;

      for (var i = 0; i < length; i++) {
        value = list[i];
        if (predicate.call(thisArg, value, i, list)) {
          return value;
        }
      }
      return undefined;
    }
  });
}

function findBla(element, index, array) {
  return element === 'bla';
}

arr.find(findBla);

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published on April 6, 2013
• Revision 4: published on September 2, 2014
• Revision 5: published on September 4, 2014
• Revision 6: published by carlesba on February 20, 2015