Online PHP editor | rfc for Y5jbr

@ 2015-12-23T02:50:09Z

<?php

namespace Acme {
	class Collection {
		private $_items;
		public function __construct(array $items = [])/*: void*/ {
			$this->_items = $items;
		}
		public function filter(callable $callback): self {
			foreach ($this->_items as $key => $value) {
				if (!call_user_func($callback, $value)) {
					unset($this->_items[$key]);
				}
			}
			return $this;
		}
		public function map(callable $callback): self {
			foreach ($this->_items as $key => $value) {
				$this->_items[$key] = call_user_func($callback, $key, $value);
			}
			return $this;
		}
		public function reindex(): self {
			$this->_items = array_values($this->_items);
		}
		public function sprintf(string $format): self {
			return $this->map(function ($key, $value) use ($format) {
				return substr_count($format, '%s') === 1
					? sprintf($format, $value)
					: sprintf($format, $key, $value);
			});
		}
		public function implode(string $delimiter = ''): string {
			$output = '';
			$first = TRUE;
			foreach ($this->_items as $value) {
				if ($first) {
					$output .= $value;
					$first = FALSE;
				} else {
					$output .= "$delimiter$value";
				}
			}
			return $output;
		}
		public static function property(string $property): callable {
			return function ($key, $value) use ($name) {
				return $value->$property;
			};
		}
	}
}

namespace {
    use Acme\Collection;

    echo (new Collection([
    	'one',
    	'two',
    	(object)['foo' => 'FOO', 'bar' => 'BAR', 'baz' => 'BAZ'],
    	'three',
    	(object)['bar' => 'BAR', 'qux' => 'QUX'],
    	]))
    	->filter('is_object')
    	->map(Collection::property('bar'))
    	->reindex()
    	->sprintf('(%s,%s)')
    	->implode('_');
}

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Undefined variable $name in /in/Y5jbr on line 47 Warning: Undefined variable $property in /in/Y5jbr on line 48 Warning: Undefined property: stdClass::$ in /in/Y5jbr on line 48 Warning: Undefined variable $property in /in/Y5jbr on line 48 Warning: Undefined property: stdClass::$ in /in/Y5jbr on line 48 Fatal error: Uncaught TypeError: Acme\Collection::reindex(): Return value must be of type Acme\Collection, none returned in /in/Y5jbr:25 Stack trace: #0 /in/Y5jbr(66): Acme\Collection->reindex() #1 {main} thrown in /in/Y5jbr on line 25
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
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