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forIn.js
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define(['../internal/baseFor', '../internal/bindCallback', './keysIn'], function(baseFor, bindCallback, keysIn) {
/**
* Iterates over own and inherited enumerable properties of an object invoking
* `iteratee` for each property. The `iteratee` is bound to `thisArg` and invoked
* with three arguments; (value, key, object). Iterator functions may exit
* iteration early by explicitly returning `false`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [thisArg] The `this` binding of `iteratee`.
* @returns {Object} Returns `object`.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forIn(new Foo, function(value, key) {
* console.log(key);
* });
* // => logs 'a', 'b', and 'c' (iteration order is not guaranteed)
*/
function forIn(object, iteratee, thisArg) {
if (typeof iteratee != 'function' || typeof thisArg != 'undefined') {
iteratee = bindCallback(iteratee, thisArg, 3);
}
return baseFor(object, iteratee, keysIn);
}
return forIn;
});