code: function isEmpty(value) {
        if (value == null) {
          return true;
        }
        if (isArrayLike(value) &&
            (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
              isBuffer(value) || isTypedArray(value) || isArguments(value))) {
          return !value.length;
        }
        var tag = getTag(value);
        if (tag == mapTag || tag == setTag) {
          return !value.size;
        }
        if (isPrototype(value)) {
          return !baseKeys(value).length;
        }
        for (var key in value) {
          if (hasOwnProperty.call(value, key)) {
            return false;
          }
        }
        return true;
      }
docs: Checks if `value` is an empty object, collection, map, or set.
  
  Objects are considered empty if they have no own enumerable string keyed
  properties.
  
  Array-like values such as `arguments` objects, arrays, buffers, strings, or
  jQuery-like collections are considered empty if they have a `length` of `0`.
  Similarly, maps and sets are considered empty if they have a `size` of `0`.
  
  @static
  @memberOf _
  @since 0.1.0
  @category Lang
  @param {*} value The value to check.
  @returns {boolean} Returns `true` if `value` is empty, else `false`.
  @example
  
  _.isEmpty(null);
  // => true
  
  _.isEmpty(true);
  // => true
  
  _.isEmpty(1);
  // => true
  
  _.isEmpty([1, 2, 3]);
  // => false
  
  _.isEmpty({ 'a': 1 });
  // => false