_baseConformsTo.js

define([], function() {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /**
   * The base implementation of `_.conformsTo` which accepts `props` to check.
   *
   * @private
   * @param {Object} object The object to inspect.
   * @param {Object} source The object of property predicates to conform to.
   * @returns {boolean} Returns `true` if `object` conforms, else `false`.
   */
  function baseConformsTo(object, source, props) {
    var length = props.length;
    if (object == null) {
      return !length;
    }
    object = Object(object);
    while (length--) {
      var key = props[length],
          predicate = source[key],
          value = object[key];

      if ((value === undefined && !(key in object)) || !predicate(value)) {
        return false;
      }
    }
    return true;
  }

  return baseConformsTo;
});