/**
 * lodash 3.1.0 (Custom Build) <https://lodash.com/>
 * Build: `lodash modern modularize exports="npm" -o ./`
 * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.8.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <https://lodash.com/license>
 */
var arrayMap = require('lodash._arraymap'),
    baseDifference = require('lodash._basedifference'),
    baseFlatten = require('lodash._baseflatten'),
    bindCallback = require('lodash._bindcallback'),
    pickByArray = require('lodash._pickbyarray'),
    pickByCallback = require('lodash._pickbycallback'),
    keysIn = require('lodash.keysin'),
    restParam = require('lodash.restparam');

/**
 * The opposite of `_.pick`; this method creates an object composed of the
 * own and inherited enumerable properties of `object` that are not omitted.
 * Property names may be specified as individual arguments or as arrays of
 * property names. If `predicate` is provided it is invoked for each property
 * of `object` omitting the properties `predicate` returns truthy for. The
 * predicate is bound to `thisArg` and invoked with three arguments:
 * (value, key, object).
 *
 * @static
 * @memberOf _
 * @category Object
 * @param {Object} object The source object.
 * @param {Function|...(string|string[])} [predicate] The function invoked per
 *  iteration or property names to omit, specified as individual property
 *  names or arrays of property names.
 * @param {*} [thisArg] The `this` binding of `predicate`.
 * @returns {Object} Returns the new object.
 * @example
 *
 * var object = { 'user': 'fred', 'age': 40 };
 *
 * _.omit(object, 'age');
 * // => { 'user': 'fred' }
 *
 * _.omit(object, _.isNumber);
 * // => { 'user': 'fred' }
 */
var omit = restParam(function(object, props) {
  if (object == null) {
    return {};
  }
  if (typeof props[0] != 'function') {
    var props = arrayMap(baseFlatten(props), String);
    return pickByArray(object, baseDifference(keysIn(object), props));
  }
  var predicate = bindCallback(props[0], props[1], 3);
  return pickByCallback(object, function(value, key, object) {
    return !predicate(value, key, object);
  });
});

module.exports = omit;