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@Smakar20
Created February 12, 2019 19:04
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findAndReplacePattern.js created by smakar20 - https://repl.it/@smakar20/findAndReplacePatternjs
/*
You have a list of words and a pattern, and you want to know which words in words matches the pattern.
A word matches the pattern if there exists a permutation of letters p so that after replacing every letter x in the pattern with p(x), we get the desired word.
(Recall that a permutation of letters is a bijection from letters to letters: every letter maps to another letter, and no two letters map to the same letter.)
Return a list of the words in words that match the given pattern.
You may return the answer in any order.
Example 1:
Input: words = ["abc","deq","mee","aqq","dkd","ccc"], pattern = "abb"
Output: ["mee","aqq"]
Explanation: "mee" matches the pattern because there is a permutation {a -> m, b -> e, ...}.
"ccc" does not match the pattern because {a -> c, b -> c, ...} is not a permutation,
since a and b map to the same letter.
Note:
1 <= words.length <= 50
1 <= pattern.length = words[i].length <= 20
*/
var findAndReplacePattern = function(words, pattern) {
var output = [];
var patternSetSize = (new Set(pattern.split(''))).size;
for (var word of words){
if ((word.length !== pattern.length) || ((new Set(word.split(''))).size !== patternSetSize)) continue;
var wordObj = {};
var count = 0;
for (var i = 0; i < word.length; i++){
if(wordObj[word[i]] !== undefined && wordObj[word[i]] !== pattern[i]) break;
wordObj[word[i]] = pattern[i];
count++;
}
if (count === pattern.length) output.push(word);
}
return output;
};
findAndReplacePattern(["abc","deq","mee","aqq","dkd","ccc", "inn"], "abb");
// Output: ["mee","aqq", "inn"]
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