입출력 예
s1 | s2 | result |
---|---|---|
["a", "b", "c"] | ["com", "b", "d", "p", "c"] | 2 |
["n", "omg"] | ["m", "dot"] | 0 |
입출력 예 #1
입출력 예 #2
const solution = (s1, s2) => s1.filter((a,i) => s2.includes(a)).length
[1, 2, 3].includes(2); // true
[1, 2, 3].includes(4); // false
[1, 2, 3].includes(3, 3); // false
[1, 2, 3].includes(3, -1); // true
[1, 2, NaN].includes(NaN); // true
arr.includes(valueToFind[, fromIndex])
valueToFind
fromIndex
Optional
https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Array/includes