3042-count-prefix-and-suffix-pairs-i

DevGod

Vtuber

Caution

DevGod needs to write an editorial for this problem!

js

/**
 * @param {string[]} words
 * @return {number}
 */
var countPrefixSuffixPairs = function(words) {
    let ans = 0;

    function isPrefixAndSuffix(str1, str2){
        if( str1.length <= str2.length){
            let prefix = str2.substring(0,str1.length);
            let suffix = str2.substring(str2.length-str1.length,str2.length);
            if( prefix === str1 && suffix === str1){
                return true;
            }
        }
        return false;
    }

    for(let I = 0; I<words.length; I++){
        for(let A = I+1; A<words.length; A++){
            if(isPrefixAndSuffix(words[I],words[A])){
                ans++;
            }
        }
    }

    return ans;
};

ts

function countPrefixSuffixPairs(words: string[]): number {

    function isPrefixAndSuffix(str1:string, str2:string): boolean{
        if(str1.length > str2.length){ return false; }

        let prefix = str2.slice(0,str1.length);
        let suffix = str2.slice(-str1.length);

        return (prefix == str1 && suffix == str1)
    }

    let score:number = 0;
    for(let A = 0; A<words.length; A++){
        for(let B = A+1; B<words.length; B++){
            if(isPrefixAndSuffix(words[A],words[B])){
                score++;
            }
        }
    }

    return score;
};