How do I efficiently make changes to a string in Javascript without creating a new string every time I make a change? The attached code
illustrates this as each “result +=” operation
will generate a new string.
The idea of using a Unit8Array as a work area appears to fail because converting to a string is just as inefficient.
; Use mask to change characters in string to a
; '-' if mask dictates that.
function maskOutput(input, mask) {
let result = '';
for (let i=0; i < input.length; i++){
if (mask.charAt(i) === 'X') {
result += '-';
} else {
result += input.charAt(i);
}
}
return result;
}