From 5ab345eddf53f69d82019f2613daeced150c6b8a Mon Sep 17 00:00:00 2001
From: Michael Jackson <mjijackson@gmail.com>
Date: Fri, 31 Aug 2012 15:03:39 -0700
Subject: [PATCH] Use JavaScript's definition of falsy

Fixes #186
---
 mustache.js                |  7 +++----
 test/_files/falsy.js       |  8 ++++++++
 test/_files/falsy.mustache | 12 ++++++++++++
 test/_files/falsy.txt      | 12 ++++++++++++
 4 files changed, 35 insertions(+), 4 deletions(-)
 create mode 100644 test/_files/falsy.js
 create mode 100644 test/_files/falsy.mustache
 create mode 100644 test/_files/falsy.txt

diff --git a/mustache.js b/mustache.js
index deb079286..6528281ee 100644
--- a/mustache.js
+++ b/mustache.js
@@ -286,10 +286,9 @@ var Mustache;
   Renderer.prototype._inverted = function (name, context, callback) {
     var value = context.lookup(name);
 
-    // From the spec: inverted sections may render text once based on the
-    // inverse value of the key. That is, they will be rendered if the key
-    // doesn't exist, is false, or is an empty list.
-    if (value == null || value === false || (isArray(value) && value.length === 0)) {
+    // Use JavaScript's definition of falsy. Include empty arrays.
+    // See https://github.com/janl/mustache.js/issues/186
+    if (!value || (isArray(value) && value.length === 0)) {
       return callback(context, this);
     }
 
diff --git a/test/_files/falsy.js b/test/_files/falsy.js
new file mode 100644
index 000000000..ae9b9bf25
--- /dev/null
+++ b/test/_files/falsy.js
@@ -0,0 +1,8 @@
+({
+  "emptyString": "",
+  "emptyArray": [],
+  "zero": 0,
+  "null": null,
+  "undefined": undefined,
+  "NaN": 0/0
+})
\ No newline at end of file
diff --git a/test/_files/falsy.mustache b/test/_files/falsy.mustache
new file mode 100644
index 000000000..f3698da64
--- /dev/null
+++ b/test/_files/falsy.mustache
@@ -0,0 +1,12 @@
+{{#emptyString}}empty string{{/emptyString}}
+{{^emptyString}}inverted empty string{{/emptyString}}
+{{#emptyArray}}empty array{{/emptyArray}}
+{{^emptyArray}}inverted empty array{{/emptyArray}}
+{{#zero}}zero{{/zero}}
+{{^zero}}inverted zero{{/zero}}
+{{#null}}null{{/null}}
+{{^null}}inverted null{{/null}}
+{{#undefined}}undefined{{/undefined}}
+{{^undefined}}inverted undefined{{/undefined}}
+{{#NaN}}NaN{{/NaN}}
+{{^NaN}}inverted NaN{{/NaN}}
diff --git a/test/_files/falsy.txt b/test/_files/falsy.txt
new file mode 100644
index 000000000..9b7cde39c
--- /dev/null
+++ b/test/_files/falsy.txt
@@ -0,0 +1,12 @@
+
+inverted empty string
+
+inverted empty array
+
+inverted zero
+
+inverted null
+
+inverted undefined
+
+inverted NaN