added check.oneOf

README.md

@@ -1,4 +1,4 @@
-# check-more-types v1.3.0
+# check-more-types v1.4.0
 
 > Additional type checks for [check-types.js](https://github.com/philbooth/check-types.js)
 
@@ -54,6 +54,7 @@ for advice and examples.
   * [check.commitId](#checkcommitid)
   * [check.shortCommitId](#checkshortcommitid)
   * [check.index](#checkindex)
+  * [check.oneOf](#checkoneof)
   * [check.same](#checksame)
   * [check.sameLength](#checksamelength)
   * [check.allSame](#checkallsame)
@@ -133,6 +134,15 @@ for advice and examples.
 
 ---
 
+#### check.oneOf
+
+    var colors = ['red', 'green', 'blue'];
+    var color = 'green';
+    check.oneOf(colors, color)); // true
+    check.oneOf(colors, 'brown')); // false
+
+---
+
 #### check.same
 
     var foo = {},

bower.json

@@ -1,7 +1,7 @@
 {
   "name": "check-more-types",
   "main": "check-more-types.js",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "homepage": "https://github.com/kensho/check-more-types",
   "license": "MIT",
   "ignore": [

check-more-types.js

@@ -77,6 +77,16 @@
     });
   }
 
+  /**
+    Returns true if given item is in the array
+
+    @method oneOf
+  */
+  function oneOf(arr, x) {
+    check.verify.array(arr, 'expected an array');
+    return arr.indexOf(x) !== -1;
+  }
+
   /**
     Returns true for urls of the format `git@....git`
 
@@ -471,7 +481,8 @@
     index: index,
     git: git,
     arrayOf: arrayOf,
-    badItems: badItems
+    badItems: badItems,
+    oneOf: oneOf
   };
 
   Object.keys(predicates).forEach(function (name) {

docs/use.md

@@ -40,6 +40,15 @@
 
 ---
 
+### check.oneOf
+
+    var colors = ['red', 'green', 'blue'];
+    var color = 'green';
+    check.oneOf(colors, color)); // true
+    check.oneOf(colors, 'brown')); // false
+
+---
+
 ### check.same
 
     var foo = {},

package.json

@@ -1,7 +1,7 @@
 {
   "name": "check-more-types",
   "description": "Additional type checks for https://github.com/philbooth/check-types.js",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "author": "Gleb Bahmutov <gleb.bahmutov@gmail.com>",
   "bugs": {
     "url": "https://github.com/kensho/check-more-types/issues"

test/unit-tests.js

@@ -13,6 +13,15 @@ describe('check-more-types', function () {
     la(check.fn(check.lowerCase));
   });
 
+  describe('check/oneOf', function () {
+    it('validates color', function () {
+      var colors = ['red', 'green', 'blue'];
+      var color = 'green';
+      la(check.oneOf(colors, color), color, 'is one of', colors);
+      la(!check.oneOf(colors, 'brown'));
+    });
+  });
+
   describe('check/arrayOf', function () {
     it('validates array of strings', function () {
       la(check.arrayOf(check.string, ['foo', '']));