LeetCode Runtime: 81ms (top 2.45%), Memory: 43.7 MB (top 3%)

validAnagram.ts

const LETTERS: number = 26;
const ASCII_LOWER: number = 'a'.charCodeAt(0);
function isAnagram(s: string, t: string): boolean {
    if (s.length !== t.length) {
        return false;
    }
    let s_a: number[] = [];
    let t_a: number[] = [];
    for (let i = 0; i < LETTERS; i++) {
        s_a.push(0);
        t_a.push(0);
    }
    for (let i = 0, n = s.length; i < n; i++) {
        s_a[s.charCodeAt(i) - ASCII_LOWER]++;
        t_a[t.charCodeAt(i) - ASCII_LOWER]++;
    }
    for (let i = 0; i < LETTERS; i++) {
        if (s_a[i] !== t_a[i]) {
            return false;
        }
    }
    return true;
};