From 8f94bd1fbdf23e03326c1197c0bd029f3c1af1a2 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Tue, 30 Apr 2013 09:18:26 -0700
Subject: [PATCH] Reduce `_.unzip` and `_.zip`.

Former-commit-id: f388c50817910eee510f33b22fd4904fd648a6f0
---
 build.js  |  2 +-
 lodash.js | 21 ++++-----------------
 2 files changed, 5 insertions(+), 18 deletions(-)

diff --git a/build.js b/build.js
index 097ae0f3e..eca0164cb 100755
--- a/build.js
+++ b/build.js
@@ -176,7 +176,7 @@
     'where': ['filter'],
     'without': ['difference'],
     'wrap': [],
-    'zip': ['max', 'pluck'],
+    'zip': ['unzip'],
     'zipObject': [],
 
     // method used by the `backbone` and `underscore` builds
diff --git a/lodash.js b/lodash.js
index 65069f0f3..3a22ac98b 100644
--- a/lodash.js
+++ b/lodash.js
@@ -4106,17 +4106,11 @@
      */
     function unzip(array) {
       var index = -1,
-          length = array ? array.length : 0,
-          tupleLength = length ? max(pluck(array, 'length')) : 0,
-          result = Array(tupleLength);
+          length = array ? max(pluck(array, 'length')) : 0,
+          result = Array(length < 0 ? 0 : length);
 
       while (++index < length) {
-        var tupleIndex = -1,
-            tuple = array[index];
-
-        while (++tupleIndex < tupleLength) {
-          (result[tupleIndex] || (result[tupleIndex] = Array(length)))[index] = tuple[tupleIndex];
-        }
+        result[index] = pluck(array, index);
       }
       return result;
     }
@@ -4157,14 +4151,7 @@
      * // => [['moe', 30, true], ['larry', 40, false]]
      */
     function zip(array) {
-      var index = -1,
-          length = array ? max(pluck(arguments, 'length')) : 0,
-          result = Array(length);
-
-      while (++index < length) {
-        result[index] = pluck(arguments, index);
-      }
-      return result;
+      return array ? unzip(arguments) : [];
     }
 
     /**