lodash/utility/attempt.js

define(['../lang/isError'], function(isError) {

  /**
   * Attempts to invoke `func`, returning either the result or the caught
   * error object.
   *
   * @static
   * @memberOf _
   * @category Utility
   * @param {*} func The function to attempt.
   * @returns {*} Returns the `func` result or error object.
   * @example
   *
   * // avoid throwing errors for invalid selectors
   * var elements = _.attempt(function() {
   *   return document.querySelectorAll(selector);
   * });
   *
   * if (_.isError(elements)) {
   *   elements = [];
   * }
   */
  function attempt(func) {
    try {
      return func();
    } catch(e) {
      return isError(e) ? e : Error(e);
    }
  }

  return attempt;
});