Last active
July 6, 2021 16:50
-
-
Save danny-andrews/2ac9bceb762f197b0c827f2a4324c03c to your computer and use it in GitHub Desktop.
Recursive Reverse
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
const reverseIterative = (arr) => { | |
const result = []; | |
for (let i = arr.length - 1; i >= 0; i--) { | |
result.push(arr[i]); | |
} | |
return result; | |
}; | |
const reverseRec = (arr) => | |
arr.length === 0 ? [] : arr.slice(-1).concat(reverseRec(arr.slice(0, -1))); | |
// reverseRec([1, 2, 3]); | |
// [3] + reverseRec([1, 2]) | |
// [3] + ([2] + reverseRec([1])) | |
// [3] + ([2] + ([1] + reverseRec([]))) | |
// [3] + ([2] + ([1] + [])) | |
// [3] + ([2] + [1]) | |
// [3] + [2, 1] | |
// [3, 2, 1] |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment