Function find

MathBox/mathbox-bundle.js:38341–38364

* Iterates over elements of a collection, returning the first element that * the callback returns truey for. The callback is bound to `thisArg` and * invoked with three arguments; (value, index|key, collection). * * If a property name is provided for `callback` the created "_.plu

(collection, callback, thisArg)

     * // => { 'name': 'fred', 'age': 40, 'blocked': true }
     */
    function find(collection, callback, thisArg) {
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          var value = collection[index];
          if (callback(value, index, collection)) {
            return value;
          }
        }
      } else {
        var result;
        forOwn(collection, function(value, index, collection) {
          if (callback(value, index, collection)) {
            result = value;
            return false;
          }
        });
        return result;
      }
    }

    /**
     * This method is like `_.find` except that it iterates over elements