차이점
| 구분 | indexOf | includes | find | findIndex |
|---|---|---|---|---|
| 특정 요소 탐색 | O | O | X | X |
| 특정 조건 탐색 | X | X | O | O |
| 배열 속 객체의 특정 프로퍼티 비교 | X | X | O | O |
| 탐색실패시 | -1 | false | undefined | -1 |
| 구분 | filter | find |
|---|---|---|
| 특정 조건 탐색 | O | O |
| 전체 탐색(무조건) | O | X |
| 반환값 | 배열 | 요소 |
| 탐색실패시 | 빈배열 | undefined |
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