Description
You are given an array of strings words, where each string represents a word containing lowercase English letters.
You are also given an integer array weights of length 26, where weights[i] represents the weight of the ith lowercase English letter.
The weight of a word is defined as the sum of the weights of its characters.
For each word, take its weight modulo 26 and map the result to a lowercase English letter using reverse alphabetical order (0 -> 'z', 1 -> 'y', ..., 25 -> 'a').
Return a string formed by concatenating the mapped characters for all words in order.
Example 1:
Input: words = ["abcd","def","xyz"], weights = [5,3,12,14,1,2,3,2,10,6,6,9,7,8,7,10,8,9,6,9,9,8,3,7,7,2]
Output: "rij"
Explanation:
- The weight of
"abcd"is5 + 3 + 12 + 14 = 34. The result modulo 26 is34 % 26 = 8, which maps to'r'. - The weight of
"def"is14 + 1 + 2 = 17. The result modulo 26 is17 % 26 = 17, which maps to'i'. - The weight of
"xyz"is7 + 7 + 2 = 16. The result modulo 26 is16 % 26 = 16, which maps to'j'.
Thus, the string formed by concatenating the mapped characters is "rij".
Example 2:
Input: words = ["a","b","c"], weights = [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
Output: "yyy"
Explanation:
Each word has weight 1. The result modulo 26 is 1 % 26 = 1, which maps to 'y'.
Thus, the string formed by concatenating the mapped characters is "yyy".
Example 3:
Input: words = ["abcd"], weights = [7,5,3,4,3,5,4,9,4,2,2,7,10,2,5,10,6,1,2,2,4,1,3,4,4,5]
Output: "g"
Explanation:
The weight of "abcd" is 7 + 5 + 3 + 4 = 19. The result modulo 26 is 19 % 26 = 19, which maps to 'g'.
Thus, the string formed by concatenating the mapped characters is "g".
Constraints:
1 <= words.length <= 1001 <= words[i].length <= 10weights.length == 261 <= weights[i] <= 100words[i]consists of lowercase English letters.
Solutions
Attempt at better performance by removing unnecessary variable declarations and simplifying the code.
/**
* @param {string[]} words
* @param {number[]} weights
* @return {string}
*/
var mapWordWeights = function(words, weights) {
let res = '';
for (const word of words) {
let sum = 0;
for (let j = 0; j < word.length; j++) {
sum += weights[word.charCodeAt(j) - 97];
}
res += String.fromCharCode(122 - (sum % 26));
}
return res;
};