refactor `isEven` function #920

Original file line number	Diff line number	Diff line change
Expand Up		@@ -7,27 +7,22 @@
		*/

		/**
	* @param {number} number
	* @return {boolean}
	*/

	/*
	* Checking if number is even using divisibility by 2
	* @function isEven
	* @description - Checking if number is even using divisibility by 2
		*
		* If number is divisible by 2 i.e remainder = 0, then it is even
		* therefore, the function will return true
		*
		* If number is not divisible by 2 i.e remainder != 0, then it is not even i.e odd
		* therefore, the function will return false
	* @param {number} number
	* @return {boolean}
		*/
	export const isEven = (number) => number % 2 === 0

	export const isEven = (number) => {
	return number % 2 === 0
	}

	/*
	* Checking if number is even using bitwise operator
	*
	/**
	* @function isEvenBitwise
	* @description - Checking if number is even using bitwise operator
		* Bitwise AND (&) compares the bits of the 32
		* bit binary representations of the number and
		* returns a number after comparing each bit:
Expand All		@@ -46,11 +41,8 @@ export const isEven = (number) => {
		* last bit will be 0 for even numbers and 1 for
		* odd numbers, which is checked with the use
		* of the equality operator.
	*
	* References:
	* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_AND
	* @param {number} number
	* @returns {boolean}
	* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_AND
		*/

	export const isEvenBitwise = (number) => {
	return (number & 1) === 0
	}
	export const isEvenBitwise = (number) => (number & 1) === 0

32 changes: 18 additions & 14 deletions Maths/test/IsEven.test.js

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Original file line number	Diff line number	Diff line change
		@@ -1,21 +1,25 @@
		import { isEven, isEvenBitwise } from '../IsEven'

	test('should return if the number is even or not', () => {
	const isEvenNumber = isEven(4)
	expect(isEvenNumber).toBe(true)
	})
	describe('Testing isEven function', () => {
	it('should return if the number is even or not', () => {
	const isEvenNumber = isEven(4)
	expect(isEvenNumber).toBe(true)
	})

	test('should return if the number is even or not', () => {
	const isEvenNumber = isEven(7)
	expect(isEvenNumber).toBe(false)
	it('should return if the number is even or not', () => {
	const isEvenNumber = isEven(7)
	expect(isEvenNumber).toBe(false)
	})
		})

	test('should return if the number is even or not', () => {
	const isEvenNumber = isEvenBitwise(6)
	expect(isEvenNumber).toBe(true)
	})
	describe('Testing isEvenBitwise function', () => {
	it('should return if the number is even or not', () => {
	const isEvenNumber = isEvenBitwise(6)
	expect(isEvenNumber).toBe(true)
	})

	test('should return if the number is even or not', () => {
	const isEvenNumber = isEvenBitwise(3)
	expect(isEvenNumber).toBe(false)
	it('should return if the number is even or not', () => {
	const isEvenNumber = isEvenBitwise(3)
	expect(isEvenNumber).toBe(false)
	})
		})

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