HORIZON PROJECT

var constant = require('./constant'),

    createInverter = require('./_createInverter'),

    identity = require('./identity');

/** Used for built-in method references. */

var objectProto = Object.prototype;

/**

 * Used to resolve the

 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)

 * of values.

 */

var nativeObjectToString = objectProto.toString;

/**

 * Creates an object composed of the inverted keys and values of `object`.

 * If `object` contains duplicate values, subsequent values overwrite

 * property assignments of previous values.

 *

 * @static

 * @memberOf _

 * @since 0.7.0

 * @category Object

 * @param {Object} object The object to invert.

 * @returns {Object} Returns the new inverted object.

 * @example

 *

 * var object = { 'a': 1, 'b': 2, 'c': 1 };

 *

 * _.invert(object);

 * // => { '1': 'c', '2': 'b' }

 */

var invert = createInverter(function(result, value, key) {

  if (value != null &&

      typeof value.toString != 'function') {

    value = nativeObjectToString.call(value);

  }

  result[value] = key;

}, constant(identity));

module.exports = invert;