feat(odd): added even and odd methods, closes #66

README.md

@@ -51,6 +51,7 @@ for advice and examples.
 
 * **API**
   * [check.email](#checkemail)
+  * [check.odd and check.even](#checkodd-and-checkeven)
   * [check.port](#checkport)
   * [check.systemPort](#checksystemport)
   * [check.userPort](#checkuserport)
@@ -137,6 +138,16 @@ check.email('me@foo.bar') // true
 check.email('me.foo.bar') // false
 ```
 
+#### check.odd and check.even
+
+Check if a number odd or even
+
+```js
+check.odd(2) // false
+check.odd(3) // true
+check.even(2) // true
+```
+
 #### check.port
 
 Returns true if passed argument is positive number less or equal to largest

dist/check-more-types.js

@@ -535,6 +535,24 @@ return /******/ (function(modules) { // webpackBootstrap
 	  x.indexOf(prefix) === 0
 	}
 
+	/**
+	  Checks if given number is even
+
+	  @method even
+	*/
+	function even (n) {
+	  return n % 2 === 0
+	}
+
+	/**
+	  Checks if given number is odd
+
+	  @method odd
+	*/
+	function odd (n) {
+	  return n % 2 === 1
+	}
+
 	/**
 	  Checks if the given item is the given {arrya, string}
 
@@ -656,17 +674,19 @@ return /******/ (function(modules) { // webpackBootstrap
 	}
 
 	module.exports = {
-	  found: found,
-	  startsWith: startsWith,
+	  allSame: allSame,
 	  contains: contains,
-	  type: curry2(type),
+	  even: even,
+	  found: found,
+	  hexRgb: hexRgb,
 	  index: index,
+	  odd: odd,
 	  oneOf: curry2(oneOf, true),
+	  raises: raises,
 	  sameLength: sameLength,
-	  allSame: allSame,
-	  unit: unit,
-	  hexRgb: hexRgb,
-	  raises: raises
+	  startsWith: startsWith,
+	  type: curry2(type),
+	  unit: unit
 	}
 
 

docs/use.md

@@ -18,6 +18,16 @@ check.email('me@foo.bar') // true
 check.email('me.foo.bar') // false
 ```
 
+### check.odd and check.even
+
+Check if a number odd or even
+
+```js
+check.odd(2) // false
+check.odd(3) // true
+check.even(2) // true
+```
+
 ### check.port
 
 Returns true if passed argument is positive number less or equal to largest

src/mid-level-spec.js

@@ -0,0 +1,28 @@
+'use strict'
+
+/* global describe, it */
+describe('check-more-types mid-level predicates', function () {
+  const la = require('lazy-ass')
+  const mid = require('./mid-level')
+  const check = require('..')
+
+  it('is an object', function () {
+    la(check.object(mid))
+  })
+
+  it('check/even', function () {
+    la(mid.even(2), '2 is even')
+    la(mid.even(4), '4 is even')
+    la(mid.even(0), '0 is even')
+    la(!mid.even(1), '1 is not even')
+    la(!mid.even(11), '11 is not even')
+  })
+
+  it('check/odd', function () {
+    la(!mid.odd(2), '2 is not odd')
+    la(!mid.odd(4), '4 is not odd')
+    la(!mid.odd(0), '0 is not odd')
+    la(mid.odd(1), '1 is odd')
+    la(mid.odd(11), '11 is odd')
+  })
+})