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Commit 0f39167

Browse files
Added BinaryToHex Conversion
1 parent 5f601fa commit 0f39167

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4 files changed

+81
-4
lines changed

4 files changed

+81
-4
lines changed

‎Bit-Manipulation/test/IsPowerOfTwo.test.js

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
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import {IsPowerOfTwo} from '../IsPowerOfTwo'
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import {IsPowerOfTwo} from '../IsPowerOfTwo'
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test('Check if 0 is a power of 2 or not:', () => {
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const res = IsPowerOfTwo(0)

‎Conversions/BinaryToHex.js

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const pad = (num, padlen) => {
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var pad = new Array(1 + padlen).join(0)
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return (pad + num).slice(-pad.length)
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}
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const hexLookup = (bin) => {
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let binary = bin
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if (binary.length < 4) {
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binary = pad(binary, 4)
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}
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switch (binary) {
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case '0000': return '0'
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case '0001': return '1'
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case '0010': return '2'
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case '0011': return '3'
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case '0100': return '4'
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case '0101': return '5'
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case '0110': return '6'
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case '0111': return '7'
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case '1000': return '8'
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case '1001': return '9'
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case '1010': return 'A'
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case '1011': return 'B'
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case '1100': return 'C'
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case '1101': return 'D'
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case '1110': return 'E'
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case '1111': return 'F'
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}
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}
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const binaryToHex = (binaryString) => {
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/*
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Function for convertung Binary to Hex
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1. The conversion will start from Least Significant Digit (LSB) to the Most Significant Bit (MSB).
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2. We divide the bits into sections of 4-bits starting from LSB to MSB.
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3. If the MSB get less than 4 bits, then we pad 0s to the front of it.
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For Example:
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Binary String = '1001101'
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1. Divide it to 2 parts => ['100', '1101']
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2. Pad 0s the MSB so it'll be => ['0100', '1101']
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3. Use the lookup table and merge them, therefore the result is 4D.
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*/
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let result = ''
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binaryString = binaryString.split('')
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for (let i = binaryString.length - 1; i >= 0; i = i - 4) {
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if (i >= 3) {
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result += hexLookup(binaryString.slice(i - 3, i + 1).join(''))
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} else {
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result += hexLookup(binaryString.slice(0, i + 1).join(''))
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}
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}
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return result.split('').reverse().join('')
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}
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export default binaryToHex

‎Conversions/TemperatureConversion.js

Lines changed: 2 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -40,8 +40,7 @@ const fahrenheitToRankine = (fahrenheit) => {
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const kelvinToCelsius = (kelvin) => {
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// Wikipedia reference: https://en.wikipedia.org/wiki/Kelvin
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// Wikipedia reference: https://en.wikipedia.org/wiki/Celsius
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return Math.round((kelvin) - 273.15)
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return Math.round((kelvin) - 273.15)
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}
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const kelvinToFahrenheit = (kelvin) => {
@@ -53,7 +52,7 @@ const kelvinToFahrenheit = (kelvin) => {
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const kelvinToRankine = (kelvin) => {
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// Wikipedia reference: https://en.wikipedia.org/wiki/Kelvin
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// Wikipedia reference: https://en.wikipedia.org/wiki/Rankine_scale
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return Math.round(((kelvin) * 9 / 5))
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return Math.round(((kelvin) * 9 / 5))
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}
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const rankineToCelsius = (rankine) => {

‎Conversions/test/BinaryToHex.test.js

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import binaryToHex from '../BinaryToHex'
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describe('BinaryToHex', () => {
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it('expects to return correct hexadecimal value', () => {
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expect(binaryToHex('1000')).toBe('8')
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})
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it('expects to return correct hexadecimal value for more than one hex digit', () => {
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expect(binaryToHex('11101010')).toBe('EA')
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})
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it('expects to return correct hexadecimal value for padding-required binary', () => {
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expect(binaryToHex('1001101')).toBe('4D')
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})
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it('expects to return correct hexadecimal value, matching (num).toString(16)', () => {
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expect(binaryToHex('1111')).toBe(parseInt('1111', 2).toString(16).toUpperCase())
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})
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})

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