Question

How to get the number of characters that two strings have in common in TypeScript

Answer 1

function commonCharactersCount(str1: string, str2: string): number {
    // Convert strings to sets of characters
    const set1: Set<string> = new Set(str1);
    const set2: Set<string> = new Set(str2);

    // Find the intersection of the two sets
    let count: number = 0;
    for (const ch of set1) {
        if (set2.has(ch)) {
            count++;
        }
    }

    return count;
}

const str1: string = "abcdefg";
const str2: string = "xayzgoe";

console.log(commonCharactersCount(str1, str2)); 


      
/*
run:
      
3
      
*/

 

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