Render log file: comparator approach

[vbrazo]

You are given an array of logs. Each log is a space-delimited string of words, where the first word is the identifier.#

There are two types of logs:

• Letter-logs: All words (except the identifier) consist of lowercase English letters.
• Digit-logs: All words (except the identifier) consist of digits.

Reorder these logs so that:

• The letter-logs come before all digit-logs.
• The letter-logs are sorted lexicographically by their contents.
• If their contents are the same, then sort them lexicographically by their identifiers.
• The digit-logs maintain their relative ordering.
• Return the final order of the logs.

# Example 1:
#
# Input: logs = ["dig1 8 1 5 1","let1 art can","dig2 3 6","let2 own kit dig","let3 art zero"]
# Output: ["let1 art can","let3 art zero","let2 own kit dig","dig1 8 1 5 1","dig2 3 6"]
#
# Explanation:
# The letter-log contents are all different, so their ordering is "art can", "art zero", "own kit dig".
# The digit-logs have a relative order of "dig1 8 1 5 1", "dig2 3 6".