Examples for presentation.

2024-11-19 13:57:03 +02:00
commit 41f2b5eec1
23 changed files with 3351 additions and 0 deletions
--- a/sources/Example/VeryGood/Indexer.php
+++ b/sources/Example/VeryGood/Indexer.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Example\VeryGood;
+class Indexer
+{
+    public static function reindex(array $elements, callable $indexGetter)
+    {
+        $result = [];
+        foreach ($elements as $element) {
+            $index = call_user_func($indexGetter, $element);
+            $result[$index] = $element;
+        }
+
+        return $result;
+    }
+
+    public static function applyWhenMatch(
+        array    $elements,
+        array    $sourceElements,
+        callable $sourceKeyGetter,
+        callable $destinationKeyGetter,
+        callable $action
+    )
+    {
+        $indexedSources = self::reindex($sourceElements, $sourceKeyGetter);
+        foreach ($elements as $element) {
+            $destinationKey = call_user_func($destinationKeyGetter, $element);
+            if (!array_key_exists($destinationKey, $indexedSources)) {
+                continue;
+            }
+            call_user_func($action, $element, $indexedSources[$destinationKey]);
+        }
+    }
+}