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<?php class Collection { private $things; public function __construct(Thing ...$things) { $this->things = $things; } public function applyToAll() { /** * This was the function in question */ array_map(function($thing) { $thing->apply(); }, $this->things); } } interface Thing { public function apply(); } class FooThing implements Thing { public function apply() { echo 'applied the way Foo does things.'; } } class BarThing implements Thing { public function apply() { echo 'Bar had something different done to it.'; } } $collection = new Collection(new FooThing, new BarThing); $collection->applyToAll();
Output for git.master, git.master_jit, rfc.property-hooks
applied the way Foo does things.Bar had something different done to it.

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