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Add 제일-작은-수-제거하기.js

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Original file line number	Diff line number	Diff line change
`@@ -52,4 +52,15 @@ function solution(arr) {`
`52`	`52`	`arr.splice(arr.indexOf(Math.min(...arr)), 1);`
`53`	`53`	`// arr가 빈 배열이 아니면 arr를 반환, arr가 빈 배열이면 [-1]반환`
`54`	`54`	`return arr.length ? arr : [-1];`
	`55`	`+}`
	`56`	`+`
	`57`	`+//정답 3 - prove-ability`
	`58`	`+function solution(arr) {`
	`59`	`+ // 최솟값 찾기`
	`60`	`+ const min = Math.min(...arr)`
	`61`	`+ // arr 중 min 과 같은 요소의 인덱스 제거`
	`62`	`+ arr.splice(arr.findIndex((num) => num === min), 1)`
	`63`	`+ // 만약 arr 가 비어있다면 [-1] 반환`
	`64`	`+ if(arr.length === 0) return [-1]`
	`65`	`+ return arr;`
`55`	`66`	`}`

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