Build a version of the Unix tr -d command. Given a list of lines and a string chars, remove every character that appears in chars from each line, then return the lines joined by newline characters (\n).
Notes: chars is a non-empty ASCII string whose characters are taken literally (no ranges). Upper and lower case are different characters. A line can become empty after deleting, and then it stays as an empty line in the output.
Function signature:
def trDelete(self, lines: List[str], chars: str) -> str:
Example:
Input: lines = ["banana", "apple"], chars = "aeiou" Output: "bnn\nppl" When printed: bnn ppl
Python's
str.maketrans takes a third argument: a string of characters to delete. Pair it with line.translate(table) to get a delete-only translation.
The full solution:
class Solution:
def trDelete(self, lines, chars):
table = str.maketrans('', '', chars)
result = []
for line in lines:
result.append(line.translate(table))
return "\n".join(result)
Free plan: 30 tutor messages. Premium is unlimited.
Saved
Ctrl + Enter to check
