Reuse identity

1 files changed, 2 insertions, 6 deletions

diff --git a/lib/async.js b/lib/async.js
index 32a2d82..f3cfb80 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -380,9 +380,7 @@
 
     async.foldr =
     async.reduceRight = function (arr, memo, iterator, callback) {
-        var reversed = _map(arr, function (x) {
-            return x;
-        }).reverse();
+        var reversed = _map(arr, identity).reverse();
         async.reduce(reversed, memo, iterator, callback);
     };
 
@@ -1039,9 +1037,7 @@
     async.memoize = function (fn, hasher) {
         var memo = {};
         var queues = {};
-        hasher = hasher || function (x) {
-            return x;
-        };
+        hasher = hasher || identity;
         var memoized = _restParam(function memoized(args) {
             var callback = args.pop();
             var key = hasher.apply(null, args);