953. Verifying an Alien Dictionary

https://leetcode.com/problems/verifying-an-alien-dictionary

Python

Hashmap

class Solution:
    def isAlienSorted(self, words: List[str], order: str) -> bool:
        mapper = {letter: i for i, letter in enumerate(order)}

        decoded = [
            [mapper[letter] for letter in word]
            for word in words
        ]

        for i in range(1, len(decoded)):
            if decoded[i] < decoded[i-1]:
                return False
        return True