Selectionsort

src/SelectionSort.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Src;
+
+class SelectionSort
+{
+    /**
+     * @param array<int> $arr
+     * @return array<int>
+     */
+    public static function sort(array $arr): array
+    {
+        $length = count($arr);
+        for ($i = 0; $i < $length; $i++) {
+            $smallest = ['index' => $i, 'value' => $arr[$i]];
+            for ($j = $i + 1; $j < $length; $j++) {
+                if ($arr[$j] < $smallest['value']) {
+                    $smallest = ['index' => $j, 'value' => $arr[$j]];
+                }
+            }
+            if ($smallest['index'] != $i) {
+                [$arr[$smallest['index']], $arr[$i]] = [$arr[$i], $arr[$smallest['index']]];
+            }
+        }
+        return $arr;
+    }
+}

tests/Benchmark/SelectionSortBench.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Benchmark;
+
+use Generator;
+use PhpBench\Attributes as Bench;
+use Src\SelectionSort;
+
+class SelectionSortBench
+{
+    #[Bench\Revs(5)]
+    #[Bench\Iterations(5)]
+    #[Bench\ParamProviders(['provideArray'])]
+    #[Bench\Timeout(10.0)]
+    public function benchSelectionSort(array $params)
+    {
+        SelectionSort::sort($params['arr']);
+    }
+
+    public function provideArray(): Generator
+    {
+        yield '100' => ['arr' => [487235, 979261, 252505, 750338, 927605, 285052, 710411, 459024, 341306, 594800, 816357, 832689, 155988, 627930, 737987, 696919, 508496, 293227, 469227, 21472, 818492, 662549, 702043, 882995, 269164, 618273, 2422, 457017, 705142, 437709, 303161, 588406, 436348, 662449, 421115, 545405, 31185, 712979, 358940, 493500, 158880, 796027, 956441, 399102, 144518, 589990, 167708, 401210, 503377, 688391, 41503, 911757, 789607, 239914, 233908, 19659, 322164, 128946, 533689, 808714, 694216, 70080, 898202, 299221, 994540, 361355, 713460, 412031, 347017, 320308, 993281, 866683, 760297, 974850, 308393, 101476, 428070, 74127, 336612, 701999, 525677, 715462, 778861, 438076, 888997, 321941, 805740, 759803, 286249, 344464, 290207, 994106, 770710, 6650, 959936, 763813, 121686, 32591, 910440, 579755]];
+        yield '1000' => ['arr' => [834400, 333681, 281996, 178893, 390211, 529367, 400997, 215314, 962545, 309866, 676927, 876471, 876438, 812396, 86688, 474199, 615427, 585703, 665903, 204935, 102611, 812669, 581433, 564383, 290435, 489118, 672922, 470652, 850292, 964516, 63560, 244886, 320181, 899749, 411686, 752799, 846864, 7240, 668380, 951457, 625842, 52787, 635699, 47710, 914224, 811338, 685969, 222925, 790044, 426659, 614714, 906158, 987212, 805281, 679825, 839811, 498545, 671357, 772318, 83043, 403005, 680009, 224999, 505394, 951609, 348711, 688119, 13651, 359056, 802833, 460931, 18887, 572255, 86244, 138957, 606112, 453321, 40262, 788273, 235554, 264350, 527851, 579625, 933318, 902585, 501173, 427386, 487332, 169947, 457267, 400071, 133744, 394420, 370740, 180240, 194545, 917509, 157386, 656107, 152560, 211539, 894683, 870173, 883461, 271340, 96058, 77764, 148703, 445076, 648790, 103547, 10300, 692037, 326335, 462195, 991790, 24886, 972485, 64429, 277587, 514981, 687197, 279271, 466180, 948926, 270403, 898254, 691849, 670822, 117284, 551878, 129188, 396124, 981324, 128747, 579656, 677458, 28090, 612749, 368531, 672849, 583563, 566965, 596459, 522498, 578676, 434181, 5268, 157660, 858293, 119968, 771583, 182095, 253316, 415738, 669955, 205095, 782195, 718127, 441712, 398372, 940803, 48545, 352367, 244606, 75057, 971610, 741037, 240630, 874288, 36533, 357399, 687322, 630218, 194982, 419317, 639437, 287412, 102506, 871199, 587665, 568237, 320470, 93147, 971509, 949601, 801679, 722760, 908253, 619973, 815531, 292462, 309374, 681145, 705686, 829884, 439356, 821154, 35088, 490277, 364014, 116912, 351321, 142491, 587047, 120129, 492567, 1979, 453450, 723642, 618654, 289991, 42942, 966819, 335127, 344331, 620246, 838693, 358656, 753537, 756745, 302216, 496269, 4512, 795279, 245961, 546534, 263909, 460056, 859294, 114807, 944293, 411240, 184442, 88765, 366597, 289719, 527825, 73539, 895355, 230217, 49277, 167362, 743306, 872324, 602158, 608019, 485656, 967593, 738863, 200348, 803579, 448624, 653320, 967921, 403707, 635428, 208396, 920091, 826285, 454048, 432494, 419067, 8271, 799923, 210229, 587759, 512519, 287875, 462353, 328833, 169710, 733155, 366136, 529049, 544598, 639069, 625453, 319737, 378239, 14238, 305670, 446795, 877113, 449647, 263552, 692133, 153523, 385479, 743229, 134783, 70725, 124077, 937626, 385022, 483454, 293451, 315539, 928593, 384352, 570739, 59725, 715562, 941697, 112774, 930490, 742076, 738673, 199788, 252158, 530489, 358071, 973773, 554194, 446849, 67478, 912619, 690999, 748447, 973790, 88963, 145899, 672730, 274439, 751602, 408722, 757169, 38931, 528907, 802894, 197890, 215705, 520939, 406093, 635263, 180520, 725593, 750994, 856600, 53519, 411098, 274210, 545229, 818762, 344751, 657583, 216673, 304295, 711427, 823674, 640156, 413301, 30605, 583382, 451440, 177645, 913626, 55354, 182627, 125999, 796456, 353108, 579503, 312078, 388018, 221434, 623346, 95736, 209262, 951502, 148687, 947, 994095, 667069, 247576, 585861, 75093, 62627, 517207, 87314, 414946, 849801, 540858, 924345, 415151, 458908, 523273, 202947, 835185, 345958, 989464, 239976, 868012, 634148, 254486, 869295, 507970, 89849, 600317, 823670, 433755, 292678, 558900, 199503, 84001, 543500, 951964, 302441, 160360, 231937, 747950, 709489, 814250, 860914, 741559, 843556, 628763, 308990, 94592, 499738, 605955, 144354, 796065, 640464, 600435, 506856, 127810, 133896, 780635, 187243, 662203, 30029, 136012, 919625, 337869, 354017, 529350, 152351, 524904, 687500, 371429, 882289, 351416, 42381, 229314, 288664, 498374, 633351, 925084, 772400, 199410, 392319, 181587, 6207, 938064, 255761, 126793, 404307, 97286, 658884, 913941, 827980, 779949, 98437, 700365, 5871, 895418, 7290, 939250, 330802, 157743, 767469, 571080, 59417, 636630, 894674, 968494, 613870, 909977, 915320, 977372, 583351, 582760, 363686, 109633, 204280, 194532, 754571, 501499, 96848, 772291, 53588, 560289, 100450, 327198, 875344, 393660, 178697, 869820, 537029, 904317, 475324, 600913, 125932, 349737, 518776, 99252, 736715, 337325, 131259, 416965, 88797, 853517, 472510, 90280, 602211, 691146, 511415, 982661, 322139, 322501, 530506, 822816, 69842, 495064, 224373, 455037, 13157, 547470, 129089, 465015, 740634, 799169, 769254, 381635, 897074, 149287, 845971, 403015, 424126, 881504, 982647, 765610, 216203, 784315, 505550, 381528, 471137, 278212, 113065, 301727, 275805, 446868, 116525, 307337, 870131, 803733, 827530, 875554, 916920, 186798, 205766, 548204, 345092, 231361, 740244, 982301, 574572, 510006, 940612, 495487, 509877, 626853, 231462, 974567, 358625, 751062, 845496, 851010, 895282, 161938, 662338, 687655, 355758, 115039, 791064, 133641, 864933, 184284, 33425, 158695, 371590, 511098, 325777, 18069, 204702, 742310, 184430, 810763, 100358, 521589, 819540, 299434, 785547, 881569, 410789, 280014, 498690, 759934, 147366, 882663, 454774, 84558, 525574, 956752, 508425, 913605, 619708, 259486, 414423, 697585, 712485, 221488, 124408, 890681, 857604, 827765, 296606, 957953, 873833, 874640, 455981, 211678, 737458, 116677, 421267, 969552, 844098, 700748, 737733, 111700, 342810, 390767, 69714, 415218, 450347, 514790, 747583, 851624, 373753, 926911, 486573, 491160, 885335, 590472, 921353, 154712, 815462, 292863, 378790, 421701, 974852, 914640, 957603, 766415, 711267, 211540, 250411, 706254, 955931, 664804, 786429, 103450, 828245, 509486, 857792, 388316, 617095, 488751, 667030, 748055, 662804, 193219, 372640, 338979, 699780, 776263, 466160, 890104, 969932, 537974, 355557, 959895, 28217, 423984, 139057, 42712, 444753, 79847, 603858, 822011, 478936, 864971, 560554, 88849, 944471, 89602, 979063, 747417, 432094, 923703, 267040, 189402, 241787, 180539, 832830, 72827, 91159, 407120, 722316, 821650, 816651, 518717, 191652, 908603, 689716, 957409, 921264, 754211, 67424, 909197, 354609, 979779, 868415, 176948, 492770, 613902, 172578, 661831, 737552, 196920, 669062, 483426, 78547, 782892, 577308, 242551, 924559, 302944, 637422, 200365, 340496, 565475, 960316, 100483, 112641, 472537, 776400, 676728, 308584, 962293, 424231, 814925, 369089, 810177, 510264, 904537, 436280, 641132, 996799, 87080, 562474, 31968, 525864, 233902, 746249, 937076, 329542, 305225, 900571, 785447, 179758, 622751, 387964, 987667, 816033, 588737, 421009, 364082, 230049, 298373, 474854, 113641, 858550, 527668, 492295, 939084, 840184, 578936, 620495, 763155, 73100, 227997, 109055, 383852, 395174, 148528, 508065, 240615, 943984, 194025, 740739, 911112, 602874, 644744, 73446, 492473, 887059, 300791, 21269, 396163, 55586, 617897, 683377, 407678, 707929, 207659, 591510, 822037, 193842, 661001, 643462, 377547, 900535, 288939, 699877, 562193, 87467, 29867, 224084, 452866, 907594, 18191, 296592, 427023, 873673, 207172, 240710, 903089, 43620, 704172, 562946, 925250, 910888, 722631, 452314, 10589, 147633, 284110, 315122, 399075, 735570, 623729, 990308, 524135, 856009, 50061, 978318, 983137, 283874, 66471, 700095, 321631, 566758, 49427, 626598, 551458, 560429, 658008, 9912, 145746, 666284, 353573, 894298, 903617, 466554, 695433, 911825, 399714, 439516, 13449, 258252, 943023, 687746, 527888, 972360, 735902, 727901, 882979, 189248, 326365, 467332, 959826, 164682, 447334, 934603, 229712, 987946, 92988, 566149, 740521, 95230, 681258, 524672, 364619, 859449, 169050, 249181, 995686, 896201, 724987, 435495, 313409, 788431, 715077, 116061, 995997, 560378, 661230, 847588, 689374, 774471, 257427, 757728, 534584, 770753, 325748, 697718, 206907, 457749, 821390, 746620, 232285, 360547, 34459, 371689, 483421, 700848, 613139, 959275, 263365, 872401, 953320, 664825, 166108, 256638, 604327, 594894, 427502, 132598, 943304, 140816, 9055, 955019, 154408, 511398, 509149, 235664, 804977, 188141, 104309, 312017, 662736, 395359, 861512, 787042, 677730, 826387, 649331, 839569, 713519, 859545, 832150, 829438, 562187, 609347, 44706, 897760, 287072, 505109, 19393, 822486, 285776, 312995, 474820, 137251, 567681, 839110, 73070, 514603]];
+    }
+}

tests/SelectionSortTest.php

@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+use Src\SelectionSort;
+
+final class SelectionSortTest extends TestCase
+{
+    #[Test]
+    #[DataProvider('arrayProvider')]
+    public function it_should_return_the_sorted_array($arr): void
+    {
+        $this->assertEquals([1,2,3,4,5,6,7,8,9], SelectionSort::sort($arr));
+    }
+
+    /*
+    * @return array
+    */
+    public static function arrayProvider(): array
+    {
+        return [
+        [[1,2,3,4,5,6,7,8,9]],
+        [[9,8,7,6,5,4,3,2,1]],
+        [[1,2,3,9,8,7,6,5,4]],
+        [[9,8,7,1,2,3,4,5,6]],
+        [[9,1,8,2,7,3,6,4,5]],
+        [[1,9,2,8,3,7,4,6,5]],
+        [[6,4,1,8,3,9,2,5,7]],
+    ];
+    }
+
+    #[Test]
+    public function it_should_sort_single_element_array(): void
+    {
+        $this->assertEquals([4], SelectionSort::sort([4]));
+    }
+
+    #[Test]
+    public function test_empty_array(): void
+    {
+        $this->assertEquals([], SelectionSort::sort([]));
+    }
+
+    #[Test]
+    public function it_should_sort_non_consecutive_numbers_correctly(): void
+    {
+        $this->assertEquals([2,5,6,8,9], SelectionSort::sort([5,9,6,2,8]));
+    }
+
+    #[Test]
+    public function it_can_sort_array_with_1000_elements(): void
+    {
+        $random = range(1, 1000);
+        shuffle($random);
+        $this->assertEquals(range(1, 1000), SelectionSort::sort($random));
+    }
+}