forIn.js (1065B)
1 var baseFor = require('./_baseFor'), 2 castFunction = require('./_castFunction'), 3 keysIn = require('./keysIn'); 4 5 /** 6 * Iterates over own and inherited enumerable string keyed properties of an 7 * object and invokes `iteratee` for each property. The iteratee is invoked 8 * with three arguments: (value, key, object). Iteratee functions may exit 9 * iteration early by explicitly returning `false`. 10 * 11 * @static 12 * @memberOf _ 13 * @since 0.3.0 14 * @category Object 15 * @param {Object} object The object to iterate over. 16 * @param {Function} [iteratee=_.identity] The function invoked per iteration. 17 * @returns {Object} Returns `object`. 18 * @see _.forInRight 19 * @example 20 * 21 * function Foo() { 22 * this.a = 1; 23 * this.b = 2; 24 * } 25 * 26 * Foo.prototype.c = 3; 27 * 28 * _.forIn(new Foo, function(value, key) { 29 * console.log(key); 30 * }); 31 * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed). 32 */ 33 function forIn(object, iteratee) { 34 return object == null 35 ? object 36 : baseFor(object, castFunction(iteratee), keysIn); 37 } 38 39 module.exports = forIn;