If I have a number represented by 3 bytes in hexadecimal form as 0x303132, how can I transform this number into a string of three characters with the same value - '012' - where each character represents the ASCII value of the corresponding byte? I am aware that one way to achieve this is by using '\x', but I am looking for a solution that does not involve hard-coding the value.
Given that the input consists of a series of hexadecimal values (each represented by two characters), my approach involves utilizing a regular expression to disregard the initial header "0x." Subsequently, I extract pairs of valid characters and apply them to the transformation function within the String.replace method. This function converts the extracted hex value into decimal, followed by converting that decimal value into its corresponding ASCII character.
input = "0xABCD"
output = input.replace(/(?:0x)?([0-9a-f]{2})/ig, function (match, $1) {
return String.fromCharCode(parseInt($1, 16));
})
console.log(output)Here is my concise functional solution (without regex, JQuery, or lodash), the variable v holds the String
const s = Array.from(Array((v.length-2)/2).keys()).reduce(
(acc, i) => acc + String.fromCharCode(parseInt(v.slice(2+i*2, 2+(i+1)*2),16)),
""
)
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