From 7c5e03285372e3720e7a397177d546e42d106c54 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Fri, 8 Jan 2016 11:47:17 -0800
Subject: [PATCH] Simplify `isNumber`.

---
 lodash.js | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/lodash.js b/lodash.js
index 868562ded..8e9a78985 100644
--- a/lodash.js
+++ b/lodash.js
@@ -10233,15 +10233,12 @@
      * // => 3
      */
     function toNumber(value) {
-      if (!value) {
-        return value === 0 ? value : +value;
-      }
       if (isObject(value)) {
         var other = isFunction(value.valueOf) ? value.valueOf() : value;
         value = isObject(other) ? (other + '') : other;
       }
-      if (typeof value == 'number' || !isString(value)) {
-        return +value;
+      if (typeof value != 'string') {
+        return value === 0 ? value : +value;
       }
       value = value.replace(reTrim, '');
       var isBinary = reIsBinary.test(value);