LeetCode: Find And Replace Pattern Solution

1/**
2 * @param {string[]} words
3 * @param {string} pattern
4 * @return {string[]}
5 */
6var findAndReplacePattern = function (words, pattern) {
7  return words.filter(word => {
8    const map = new Map()
9    const set = new Set()
10    return word.split("").every((char, i) => {
11      if (!set.has(char) && !map.has(pattern[i])) {
12        map.set(pattern[i], char)
13        set.add(char) // avoid two diff pattern[i] match for one same char
14      }
15      return map.get(pattern[i]) === char
16    })
17  })
18}