algorithm/JavaScript
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/JavaScript.git synced 2025-07-05 00:01:37 +08:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #274 from higorcastilho/patch-2

Browse Source 
Create HexToDecimal.js
This commit is contained in:
Rak Laptudirm
2021-05-23 14:47:41 +05:30
committed by GitHub
parent 712eca9824 1a3a2639ba
commit 2be097a91e
1 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
Conversions/HexToDecimal.js Normal file
View File

@ -0,0 +1,27 @@
function hexToInt (hexNum) {
const numArr = hexNum.split('') // converts number to array
numArr.map((item, index) => {
if (!(item > 0)) {
switch (item) {
case 'A': return (numArr[index] = 10)
case 'B': return (numArr[index] = 11)
case 'C': return (numArr[index] = 12)
case 'D': return (numArr[index] = 13)
case 'E': return (numArr[index] = 14)
case 'F': return (numArr[index] = 15)
}
} else numArr[index] = parseInt(item)
})
return numArr // returns an array only with integer numbers
}
function hexToDecimal (hexNum) {
const intItemsArr = hexToInt(hexNum)
return intItemsArr.reduce((accumulator, current, index) => {
return accumulator + (current * Math.pow(16, (intItemsArr.length - (1 + index))))
}, 0)
}
// test cases
console.log(hexToDecimal('5DE9A')) // 384666
console.log(hexToDecimal('3D')) // 61