0392. Is Subsequence.md

Array

/**
 * @param {string} s
 * @param {string} t
 * @return {boolean}
 */
var isSubsequence = function(s, t) {
    let ptr = 0;

    for(let i = 0; i < t.length; i++) {
        if(s[ptr] === t[i]) {
            ptr++;
        }
    }
    return ptr === s.length;
};