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Merged
raklaptudirm merged 1 commit into from
May 23, 2021
Merged

Create HexToDecimal.js #274

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27 changes: 27 additions & 0 deletions Conversions/HexToDecimal.js
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Original file line number Diff line number Diff line change
@@ -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