init

.editorconfig

@@ -0,0 +1,16 @@
+# editorconfig.org
+root = true
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[package.json]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false

.gitattributes

@@ -0,0 +1 @@
+* text=auto

.gitignore

@@ -0,0 +1 @@
+node_modules

.jshintrc

@@ -0,0 +1,13 @@
+{
+	"node": true,
+	"esnext": true,
+	"bitwise": true,
+	"camelcase": true,
+	"curly": true,
+	"immed": true,
+	"newcap": true,
+	"noarg": true,
+	"undef": true,
+	"unused": "vars",
+	"strict": true
+}

.travis.yml

@@ -0,0 +1,3 @@
+language: node_js
+node_js:
+  - '0.10'

index.js

@@ -0,0 +1,14 @@
+'use strict';
+module.exports = function (val) {
+	val = String(val).trim();
+
+	if (/^(?:y|yes|true)$/i.test(val)) {
+		return true;
+	}
+
+	if (/^(?:n|no|false)$/i.test(val)) {
+		return false;
+	}
+
+	return null;
+};

license

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

package.json

@@ -0,0 +1,37 @@
+{
+  "name": "yn",
+  "version": "0.0.0",
+  "description": "Parse yes/no like values",
+  "license": "MIT",
+  "repository": "sindresorhus/yn",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "http://sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "node test.js"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "yn",
+    "yes",
+    "no",
+    "cli",
+    "prompt",
+    "validate",
+    "input",
+    "answer",
+    "true",
+    "false",
+    "parse"
+  ],
+  "devDependencies": {
+    "ava": "0.0.3"
+  }
+}

readme.md

@@ -0,0 +1,46 @@
+# yn [![Build Status](https://travis-ci.org/sindresorhus/yn.svg?branch=master)](https://travis-ci.org/sindresorhus/yn)
+
+> Parse yes/no like values
+
+Useful for validating answers of a CLI prompt.
+
+-
+
+The following case-insensitive values are recognized:
+
+```js
+'y', 'yes', 'true', true, 'n', 'no', 'false', false
+```
+
+
+## Install
+
+```sh
+$ npm install --save yn
+```
+
+
+## Usage
+
+```js
+var yn = require('yn');
+
+yn('y');
+//=> true
+
+yn('NO');
+//=> false
+
+yn(true);
+//=> true
+
+yn('unicorn');
+//=> null
+```
+
+Unrecognized values returns `null`.
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)

test.js

@@ -0,0 +1,33 @@
+'use strict';
+var test = require('ava');
+var yn = require('./');
+
+test(function (t) {
+	[
+		'y',
+		'Y',
+		'yes',
+		'YES',
+		'Yes',
+		'true',
+		true
+	].forEach(function (el) {
+		t.assert(yn(el) === true);
+	});
+
+	[
+		'n',
+		'N',
+		'no',
+		'NO',
+		'No',
+		'false',
+		false
+	].forEach(function (el) {
+		t.assert(yn(el) === false);
+	});
+
+	t.assert(yn(NaN) === null);
+	t.assert(yn('') === null);
+	t.assert(yn('unicorn') === null);
+});