lodash/internal/getFuncName.js

define(['./baseProperty', '../utility/constant', './realNames', '../support'], function(baseProperty, constant, realNames, support) {

  /**
   * Gets the name of `func`.
   *
   * @private
   * @param {Function} func The function to query.
   * @returns {string} Returns the function name.
   */
  var getFuncName = (function() {
    if (!support.funcNames) {
      return constant('');
    }
    if (constant.name == 'constant') {
      return baseProperty('name');
    }
    return function(func) {
      var result = func.name,
          array = realNames[result],
          length = array ? array.length : 0;

      while (length--) {
        var data = array[length],
            otherFunc = data.func;

        if (otherFunc == null || otherFunc == func) {
          return data.name;
        }
      }
      return result;
    };
  }());

  return getFuncName;
});