937 - Reorder Data in Log Files
Written on December 19, 2019
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You have an array of logs. Each log is a space delimited string of words. For each log, the first word in each log is an alphanumeric identifier. Then, either:
- Each word after the identifier will consist only of lowercase letters, or;
- Each word after the identifier will consist only of digits.
We will call these two varieties of logs letter-logs and digit-logs. It is guaranteed that each log has at least one word after its identifier. Reorder the logs so that all of the letter-logs come before any digit-log. The letter-logs are ordered lexicographically ignoring identifier, with the identifier used in case of ties. The digit-logs should be put in their original order. Return the final order of the logs.
class Solution:
def reorderLogFiles(self, logs: List[str]) -> List[str]:
def sort_key(log):
ident, rest = log.split(" ", 1)
return (0, rest, ident) if rest[0].isalpha() else (1, )
logs.sort(key=sort_key)
return logs