1  var realNames = require('./_realNames');
 2  
 3  /** Used for built-in method references. */
 4  var objectProto = Object.prototype;
 5  
 6  /** Used to check objects for own properties. */
 7  var hasOwnProperty = objectProto.hasOwnProperty;
 8  
 9  /**
10   * Gets the name of `func`.
11   *
12   * @private
13   * @param {Function} func The function to query.
14   * @returns {string} Returns the function name.
15   */
16  function getFuncName(func) {
17    var result = (func.name + ''),
18        array = realNames[result],
19        length = hasOwnProperty.call(realNames, result) ? array.length : 0;
20  
21    while (length--) {
22      var data = array[length],
23          otherFunc = data.func;
24      if (otherFunc == null || otherFunc == func) {
25        return data.name;
26      }
27    }
28    return result;
29  }
30  
31  module.exports = getFuncName;