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Feat: Add nth #19

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Feat: Add nth #19

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56a3cdd
Feat: dropRight.js
chaeminseok Aug 13, 2023
2dd75d2
Feat: add nth
chaeminseok Aug 20, 2023
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23 changes: 23 additions & 0 deletions dropRight.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
function dropRight(arr, n = 1) {
if (!Array.isArray(arr)) {
throw new Error('배열을 입력하세요!');
}

if (arr.length === 0) {
return [];
}
if (n <= 0) {
return arr;
}

const result = [];

for (let i = 0; i < arr.length - n; i++) {
result.push(arr[i]);
}

return result;
}
//console.log(dropRight([1, 2, 3], 2));

export default dropRight;
19 changes: 19 additions & 0 deletions nth.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,19 @@
function nth(arr, n = 0) {
if (!Array.isArray(arr)) {
throw new Error('배열을 입력하세요!');
}
// if (!Number.isInteger(n)) {
// return arr[0];
// }
// if (n >= 0) {
// return arr[n];
// } else if (n < 0) {
// return arr[arr.length + n];
// }
return (
Array.isArray(arr) &&
(Number.isInteger(n) ? (n >= 0 ? arr[n] : arr[arr.length + n]) : arr[0])
);
}

module.exports = nth;