Function inArray

docs/tests/v2/es6/js/sanddance.js:51631–51647

* find if a array contains the object using indexOf or a simple polyFill * @param {Array} src * @param {String} find * @param {String} [findByKey] * @return {Boolean|Number} false when not found, or the index

(src, find, findByKey)

  function inArray(src, find, findByKey) {
    if (src.indexOf && !findByKey) {
      return src.indexOf(find);
    } else {
      var i = 0;

      while (i < src.length) {
        if (findByKey && src[i][findByKey] == find || !findByKey && src[i] === find) {
          return i;
        }

        i++;
      }

      return -1;
    }
  }
  /**
   * convert array-like objects to real arrays
   * @param {Object} obj