Allowlist input sanitization
Implement allowlist-based input sanitization. Given a `value` string and an `allowlist` (a list of permitted characters), return a new string containing only the characters of `value` that appear in the allowlist, preserving their original order. Characters not on the allowlist are dropped entirely. This is the safe alternative to denylisting dangerous characters.
Implement
sanitize_input(value: str, allowlist: list[str]) → strExamples
in
["ab<script>12",["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9"]]out"abscript12"What a strong answer looks like
State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.
0:00 of about 10 min
solution.py
InputExpectedGot
["ab<script>12",["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9"]]"abscript12"not run yetsample