SIGN IN SIGN UP

Algorithms and Data Structures implemented in JavaScript for beginners, following best practices.

34087 0 0 JavaScript
function hexToInt(hexNum) {
if (!/^[0-9A-F]+$/.test(hexNum)) {
throw new Error('Invalid hex string.')
}
const numArr = hexNum.split('') // converts number to array
2021-10-21 22:59:56 +05:30
return numArr.map((item, index) => {
switch (item) {
case 'A':
return 10
case 'B':
return 11
case 'C':
return 12
case 'D':
return 13
case 'E':
return 14
case 'F':
return 15
default:
return parseInt(item)
2021-10-21 22:59:56 +05:30
}
})
}
function hexToDecimal(hexNum) {
const intItemsArr = hexToInt(hexNum)
return intItemsArr.reduce((accumulator, current, index) => {
return (
accumulator + current * Math.pow(16, intItemsArr.length - (1 + index))
)
}, 0)
}
export { hexToDecimal }