Data manager for commonly-need tasks when working with large evaluation datasets.

petercoles · petercoles · commit ccae18c4257a · 2018-07-06T10:02:56.000+01:00
diff --git a/src/DataManager.php b/src/DataManager.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PeterColes\GAO;
+
+use DirectoryIterator;
+use Illuminate\Support\Collection;
+
+class DataManager
+{
+    public function loadCsvDir(String $inDir): Collection
+    {
+        $allData = [];
+        foreach (new DirectoryIterator($inDir) as $fileInfo) {
+            if (!$fileInfo->isDot()) {
+                $allData[] = $this->csvToArray($fileInfo->getPathname());
+            }
+        }
+
+        return collect($allData);
+    }
+
+    public function split(Collection $data, Float $testDataRatio): Collection
+    {
+        return $data->partition(function () use ($testDataRatio) {
+            return mt_rand() / mt_getrandmax() > $testDataRatio;
+        });
+    }
+
+    public function save(String $outFile, Collection $contents)
+    {
+        file_put_contents($outFile, json_encode($contents->values()));
+    }
+
+    public function load(String $inFile): Collection
+    {
+        return collect(json_decode(file_get_contents($inFile)));
+    }
+
+    public function setMemoryLimit($limit = '1G')
+    {
+        ini_set('memory_limit', $limit);
+    }
+
+    protected function csvToArray(String $filepath, Bool $headings = false): array
+    {
+        $rows = array_map('str_getcsv', file($filepath));
+
+        if ($headings) {
+            array_shift($rows);
+        }
+
+        return $rows;
+    }
+}
diff --git a/tests/DataManagerTest.php b/tests/DataManagerTest.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace PeterColes\GAO\Tests;
+
+use PHPUnit\Framework\TestCase;
+use PeterColes\GAO\DataManager;
+
+class DataManagerTest extends TestCase
+{
+    protected $dm;
+
+    protected $racesFile = __DIR__ . '/data/races.json';
+
+    public function setUp()
+    {
+        $this->dm = new DataManager();
+    }
+
+    public function tearDown()
+    {
+        if (file_exists($this->racesFile)) {
+            unlink($this->racesFile);
+        }
+    }
+
+    /** @test */
+    public function can_load_csv_files_from_directory()
+    {
+        $data = $this->dm->loadCsvDir(__DIR__ . '/data/races');
+
+        $this->assertCount(10, $data);
+        $this->assertCount(36, $data[3]);
+        $this->assertCount(2, $data[7][21]);
+    }
+
+    /** @test */
+    public function can_split_collection()
+    {
+        mt_srand(42);
+
+        $data = $this->dm->loadCsvDir(__DIR__ . '/data/races');
+        $split = $this->dm->split($data, .2);
+
+        $this->assertCount(8, $split->first());
+        $this->assertCount(2, $split->last());
+    }
+
+    /** @test */
+    public function can_read_and_write_data_as_json()
+    {
+        $this->assertFileNotExists($this->racesFile);
+
+        $data = $this->dm->loadCsvDir(__DIR__ . '/data/races');
+
+        $this->dm->save($this->racesFile, $data);
+
+        $this->assertJsonFileEqualsJsonFile(__DIR__ . '/data/expected-races.json', $this->racesFile);
+        $retrievedData = $this->dm->load($this->racesFile);
+
+        $this->assertEquals($data, $retrievedData);
+    }
+
+    /** @test */
+    public function can_change_memory_limit()
+    {
+        $initialLimit = ini_get('memory_limit');
+
+        $newLimit = $initialLimit == '512M' ? '1G' : '512M';
+
+        $this->dm->setMemoryLimit($newLimit);
+
+        $this->assertEquals($newLimit, ini_get('memory_limit'));
+    }
+}
diff --git a/tests/data/expected-races.json b/tests/data/expected-races.json
@@ -0,0 +1 @@
+[[["3.375","3.7934652554073"],["3.375","7.6069028992177"],["3.375","6.785632183908"],["3.4","3.383908045977"],["3.4","3.3105220883534"],["3.4","3.300562248996"],["3.375","7.2940562248996"],["3.4","3.300562248996"],["3.4","3.4210441767068"],["3.4","3.4309650394716"],["3.4","2.5297245045916"],["3.4","3.4309650394716"],["3.4","2.5297245045916"],["3.4","3.4309650394716"],["3.4","2.5297245045916"],["3.375","3.4300789431287"],["3.4","2.5297245045916"],["3.4","3.4309650394716"],["3.4","2.5297245045916"],["3.375","3.4366038343805"],["3.375","7.4425648461415"],["3.375","3.4398260029"],["3.375","3.4333011116481"],["3.375","3.7641372643789"],["3.375","6.8688577412599"],["3.375","7.1751935375295"],["3.375","3.7143217771794"],["3.3","7.8980141366543"],["3.275","7.9488482384824"],["3.525","3.4748447204969"],["3.325","7.2872670807453"],["3.325","7.3216614906832"],["3.3","8.143609671848"],["3.325","3.8344559585492"],["3.325","4.9129232131002"],["3.375","3.9125912812569"],["3.375","4.4465589732242"],["3.375","4.9571807922107"],["3.4","3.9125912812569"],["3.4","3.8278848235549"]],[["6.95","15.931829328102"],["6.95","16.376900441393"],["6.95","12.511240164856"],["6.95","16.296974133724"],["7.25","12.147144416151"],["7.15","16.296974133724"],["7.15","15.420226275687"],["7.15","14.261157377749"],["7.15","25.794382022472"],["7.15","20.173110720562"],["7.05","25.910835214447"],["7.05","26.509237875289"],["6.95","26.582908754053"],["6.95","28.147376164787"],["6.95","27.57928880346"],["6.95","28.010004880429"],["6.95","26.503117063034"],["7.25","26.046063081461"],["7.15","26.503117063034"],["7.15","25.288609825953"],["7.15","26.856574637342"],["7.15","28.010004880429"],["7.15","26.503117063034"],["7.15","27.027313397692"],["7.15","24.958686671015"],["7.15","20.173110720562"],["7.15","18.688537935526"],["7.15","23.415952672379"],["7.15","23.43125254998"],["7.15","18.448442017347"],["7.15","18.749591903363"],["7.15","24.303851036818"],["7.15","18.749591903363"],["7.05","24.303851036818"],["7.05","15.794752433347"],["7.05","12.511900771036"],["7.05","12.008687258687"],["6.95","15.258789860998"],["6.95","13.918702218907"]],[["6.45","13.029819161216"],["6.45","14.62389380531"],["6.45","14.443283298499"],["6.35","14.62389380531"],["6.35","14.867005671817"],["6.35","14.121307820918"],["6.35","20.550148688835"],["6.35","21.121144762434"],["6.35","20.550148688835"],["6.35","21.121144762434"],["6.25","20.550148688835"],["6.25","18.732612435488"],["6.25","13.249261254997"],["6.25","18.732612435488"],["6.25","13.249261254997"],["6.15","12.670046542553"],["6.15","11.828522656735"],["6.15","12.014974779319"],["6.05","12.160657306956"],["6.05","16.013235294118"],["6.05","11.828522656735"],["6.05","12.345804988662"],["6.05","11.828522656735"],["6.05","12.670046542553"],["6.05","17.595337026777"],["6.05","11.997953722651"],["5.95","11.505358490566"],["5.95","10.776615297611"],["5.95","10.931163057508"],["5.85","13.677193612058"]],[["12.9","4.3918918918919"],["12.9","5.0469692993965"],["12.9","15.944109157701"],["12.9","18.118341642613"],["12.9","18.606575047157"],["12.9","18.118341642613"],["12.9","19.390339792193"],["12.9","18.118341642613"],["12.9","18.606575047157"],["12.65","18.118341642613"],["12.65","24.65155301678"],["16.9","25.564235468345"],["16.9","24.65155301678"],["16.9","19.870215827338"],["16.9","21.410542635659"],["16.9","22.07936"],["16.9","21.394728682171"],["16.9","21.409302325581"],["16.9","22.0944"],["16.4","21.409302325581"],["16.5","5.8465496368039"],["16.5","5.3368644067797"],["16.5","5.8465496368039"],["16.5","20.90102905569"],["16.5","19.43078221722"],["16.5","31.139842431064"],["16.6","19.43078221722"],["16.6","19.428531232414"],["16.6","19.354248733821"],["16.6","19.428531232414"],["16.6","23.975347222222"],["16.6","19.428531232414"],["16.6","19.991024898668"],["16.6","19.428531232414"],["16.6","19.991024898668"],["16.1","19.428531232414"]],[["7.7","5.127506195089"],["7.7","3.9556830031283"],["7.7","11.173096976017"],["7.7","12.613138686131"],["7.7","12.668230795968"],["7.7","12.81072056239"],["7.7","12.292242833052"],["7.7","13.067945500179"],["7.7","13.306498722161"],["7.7","13.067945500179"],["8.1","13.655488947171"],["8.1","13.021257591997"],["8.1","13.25809385231"],["7.6","13.021257591997"],["8.1","13.25809385231"],["8","13.021257591997"],["8","12.250924369748"],["8","12.81072056239"],["7.9","12.292242833052"],["7.9","12.503087478559"],["7.8","12.668230795968"],["7.8","13.067945500179"],["7.8","12.292242833052"],["7.9","3.8731871838111"],["7.9","4.0365553602812"],["7.8","3.8731871838111"],["7.8","3.9396226415094"],["7.7","3.9916579770594"],["7.7","4.1176048762998"],["7.7","4.3865184653998"],["7.7","4.5837392281753"],["7.7","4.3708467309753"],["8.2","4.450345580211"],["8.1","4.3708467309753"],["8.1","4.112268907563"],["8.1","4.3001757469244"],["8","4.1191919191919"],["8","4.1897260273973"],["7.9","4.2449687716863"]],[["8.3","5.6874660879002"],["8.3","6.418339663592"],["11.05","6.5973229224763"],["10.8","6.41833966359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diff --git a/tests/data/races/5b3e7cdbd7ad9 b/tests/data/races/5b3e7cdbd7ad9
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diff --git a/tests/data/races/5b3e7ce0b968d b/tests/data/races/5b3e7ce0b968d
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diff --git a/tests/data/races/5b3e7cec8f30c b/tests/data/races/5b3e7cec8f30c
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diff --git a/tests/data/races/5b3e7cf0f2730 b/tests/data/races/5b3e7cf0f2730
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diff --git a/tests/data/races/5b3e7cf4dbec4 b/tests/data/races/5b3e7cf4dbec4
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diff --git a/tests/data/races/5b3e7cf7bf542 b/tests/data/races/5b3e7cf7bf542
diff --git a/tests/data/races/5b3e7cfadccbd b/tests/data/races/5b3e7cfadccbd
diff --git a/tests/data/races/5b3e7cfdececb b/tests/data/races/5b3e7cfdececb

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