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20 lines
640 B
20 lines
640 B
7 years ago
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function isSubsequence(s, t) {
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if (s.length > t.length) {
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return false;
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}
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let matchedLength = 0;
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for (let i = 0; i < t.length; i++) {
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if (matchedLength < s.length && s[matchedLength] === t[i]) {
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matchedLength += 1;
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}
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}
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return matchedLength === s.length;
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}
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console.log(isSubsequence('abc', 'abcde') === true);
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console.log(isSubsequence('abd', 'abcde') === true);
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console.log(isSubsequence('abf', 'abcde') === false);
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console.log(isSubsequence('abef', 'abcde') === false);
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console.log(isSubsequence('abcdef', 'abcde') === false);
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console.log(isSubsequence('a', 'abcde') === true);
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