-
Notifications
You must be signed in to change notification settings - Fork 0
/
scrabbleScore.js
51 lines (35 loc) 路 1.25 KB
/
scrabbleScore.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
const verifyPremiumSquares = (nextLetter) => {
let scoreBonusLetter = 1, scoreBonusWord = 1;
const premiumSquareMultipliers = {b: 2, g: 3, r: 2, o: 3};
const premiumSquareLettersPatterns = /(b|g)/;
const premiumSquareWordsPatterns = /(r|o)/;
if(premiumSquareLettersPatterns.test(nextLetter))
scoreBonusLetter = premiumSquareMultipliers[nextLetter];
else if(premiumSquareWordsPatterns.test(nextLetter))
scoreBonusWord = premiumSquareMultipliers[nextLetter];
return { scoreBonusLetter, scoreBonusWord };
}
const scrabbleScore = (word) => {
let score = 0, scoreMultiplier = 1;
const scorePatterns = [
/(E|A|I|O|N|R|T|L|S|U)/g,
/(D|G)/g,
/(B|C|M|P)/g,
/(F|H|V|W|Y)/g,
/(K)/g,
/(J|X)/g,
/(Q|Z)/g
];
const specialPossibleScores = [8, 10];
for(let index = 0; index < scorePatterns.length; index++){
const patternMatches = word.matchAll(scorePatterns[index]);
for(match of patternMatches){
const nextLetter = word[match.index + 1];
let { scoreBonusLetter, scoreBonusWord } = verifyPremiumSquares(nextLetter);
const baseScore = (index < 5) ? (index + 1) : specialPossibleScores[index-5];
score += baseScore * scoreBonusLetter;
scoreMultiplier *= scoreBonusWord;
}
}
return score * scoreMultiplier;
}