HORIZON PROJECT

var arrayMap = require('./_arrayMap'),

    baseIteratee = require('./_baseIteratee'),

    basePickBy = require('./_basePickBy'),

    getAllKeysIn = require('./_getAllKeysIn');

/**

 * Creates an object composed of the `object` properties `predicate` returns

 * truthy for. The predicate is invoked with two arguments: (value, key).

 *

 * @static

 * @memberOf _

 * @since 4.0.0

 * @category Object

 * @param {Object} object The source object.

 * @param {Function} [predicate=_.identity] The function invoked per property.

 * @returns {Object} Returns the new object.

 * @example

 *

 * var object = { 'a': 1, 'b': '2', 'c': 3 };

 *

 * _.pickBy(object, _.isNumber);

 * // => { 'a': 1, 'c': 3 }

 */

function pickBy(object, predicate) {

  if (object == null) {

    return {};

  }

  var props = arrayMap(getAllKeysIn(object), function(prop) {

    return [prop];

  });

  predicate = baseIteratee(predicate);

  return basePickBy(object, props, function(value, path) {

    return predicate(value, path[0]);

  });

}

module.exports = pickBy;