algorithm/JavaScript
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/JavaScript.git synced 2025-07-06 09:28:26 +08:00
Code Issues Packages Projects Releases Wiki Activity

style fixes

Browse Source
This commit is contained in:
Andrew Chudinovskyh
2020-10-31 17:53:08 +02:00
parent e424ba2a4f
commit 83b05cde15
1 changed files with 19 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
Search/QuickSelectSearch.js
View File

@ -11,45 +11,45 @@
* *
* [Reference](http://en.wikipedia.org/wiki/Quickselect) * [Reference](http://en.wikipedia.org/wiki/Quickselect)
*/ */
function quickSelectSearch(array, k) { function quickSelectSearch (array, k) {
if (!array || array.length <= k) { if (!array || array.length <= k) {
throw new Error('Invalid arguments'); throw new Error('Invalid arguments')
} }
let from = 0; let from = 0
let to = array.length - 1; let to = array.length - 1
while (from < to) { while (from < to) {
let left = from; let left = from
let right = to; let right = to
const pivot = array[Math.ceil((left + right) * 0.5)]; const pivot = array[Math.ceil((left + right) * 0.5)]
while (left < right) { while (left < right) {
if (array[left] >= pivot) { if (array[left] >= pivot) {
const tmp = array[left]; const tmp = array[left]
array[left] = array[right]; array[left] = array[right]
array[right] = tmp; array[right] = tmp
--right; --right
} else { } else {
++left; ++left
} }
} }
if (array[left] > pivot) { if (array[left] > pivot) {
--left; --left
} }
if (k <= left) { if (k <= left) {
to = left; to = left
} else { } else {
from = left + 1; from = left + 1
} }
} }
return array; return array
} }
/* ---------------------------------- Test ---------------------------------- */ /* ---------------------------------- Test ---------------------------------- */
const arr = [1121111, 21, 333, 41, 5, 66, 7777, 28, 19, 11110] const arr = [1121111, 21, 333, 41, 5, 66, 7777, 28, 19, 11110]
console.log(quickSelectSearch(arr, 5)); // [ 19, 21, 28, 41, 5, 66, 333, 11110, 1121111, 7777 ] console.log(quickSelectSearch(arr, 5)) // [ 19, 21, 28, 41, 5, 66, 333, 11110, 1121111, 7777 ]
console.log(quickSelectSearch(arr, 2)); // [ 19, 5, 21, 41, 28, 333, 11110, 1121111, 7777, 66 ] console.log(quickSelectSearch(arr, 2)) // [ 19, 5, 21, 41, 28, 333, 11110, 1121111, 7777, 66 ]
console.log(quickSelectSearch(arr, 7)); // [ 19, 5, 21, 41, 28, 66, 333, 7777, 11110, 1121111 ] console.log(quickSelectSearch(arr, 7)) // [ 19, 5, 21, 41, 28, 66, 333, 7777, 11110, 1121111 ]