ArrayList::isEmpty() - Code Metrics - Wandu/Framework - Measure and Improve Code Quality continuously with Scrutinizer

ArrayList::isEmpty() A
last analyzed 2018-03-08 03:43 UTC

↳ Parent: ArrayList

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
eloc	2
nc	1
nop	0
dl	0
loc	4
ccs	2
cts	2
cp	1
crap	1
rs	10
c	0
b	0
f	0

<?php
namespace Wandu\Collection;

use InvalidArgumentException;
use Traversable;
use Wandu\Collection\Contracts\ListInterface;

class ArrayList implements ListInterface
{
    /** @var array */
    protected $items;

    /**
     * @param array|\Traversable $items
     */
    public function __construct($items = [])
    {
        if ($items instanceof Traversable) {
            $this->items = iterator_to_array($items); // for lazy iterate
        } else {
            $this->items = array_values($items);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function __toString()
    {
        $string = static::class . " [\n";
        foreach ($this as $item) {
            $string .= "    ";
            if (is_string($item)) {
                $string .= "\"{$item}\",\n";
            } elseif (is_scalar($item)) {
                $string .= "{$item},\n";
            } elseif (is_null($item)) {
                $string .= "null,\n";
            } elseif (is_array($item)) {
                $string .= "[array],\n";
            } elseif (is_object($item)) {
                $string .= "[" . get_class($item) . "],\n";
            } else {
                $string .= "[unknown],\n";
            }
        }
        return $string . ']';
    }

    /**
     * {@inheritdoc}
     */
    public function toArray()
    {
        $arr = [];
        foreach ($this as $item) {
            if (method_exists($item, 'toArray')) {
                $arr[] = $item->toArray();
            } else {
                $arr[] = $item;
            }
        }
        return $arr;
    }

    /**
     * {@inheritdoc}
     */
    public function all()
    {
        return $this->items;
    }

    /**
     * {@inheritdoc}
     */
    public function count()
    {
        return count($this->items);
    }

    /**
     * {@inheritdoc}
     */
    function jsonSerialize()
    {
        return $this->all(); // safe
    }
    
    /**
     * {@inheritdoc}
     */
    public function getIterator()
    {
        foreach ($this->items as $item) {
            yield $item;
        }
    }

    /**
     * {@inheritdoc}
     */
    public function offsetExists($offset)
    {
        return isset($this->items[$offset]);
    }

    /**
     * {@inheritdoc}
     */
    public function offsetGet($offset)
    {
        return $this->get($offset);
    }

    /**
     * {@inheritdoc}
     */
    public function offsetSet($offset, $value)
    {
        $this->assertIsNullOrIntegerLessSize($offset, __METHOD__);
        $this->set($offset, $value);
    }

    /**
     * {@inheritdoc}
     */
    public function offsetUnset($offset)
    {
        $this->remove($offset);
    }

    /**
     * {@inheritdoc}
     */
    public function serialize()
    {
        return serialize($this->items);
    }

    /**
     * {@inheritdoc}
     */
    public function unserialize($serialized)
    {
        $this->items = unserialize($serialized);
    }

    /**
     * {@inheritdoc}
     */
    public function clear()
    {
        $this->items = [];
    }

    /**
     * {@inheritdoc}
     */
    public function contains(...$values)
    {
        foreach ($values as $value) {
            if (!in_array($value, $this->items, true)) {
                return false;
            }
        }
        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function get($key, $default = null)
    {
        return array_key_exists($key, $this->items) ? $this->items[$key] : $default;
    }

    /**
     * {@inheritdoc}
     */
    public function set($key, $value)
    {
        if (isset($key)) {
            $this->items[(int) $key] = $value;
        } else {
            $this->items[] = $value;
        }
    }

    /**
     * {@inheritdoc}
     */
    public function remove(...$keys)
    {
        foreach ($keys as $key) {
            unset($this->items[$key]);
        }
        $this->items = array_values($this->items);
    }

    /**
     * {@inheritdoc}
     */
    public function has(...$keys)
    {
        foreach ($keys as $key) {
            if (!array_key_exists($key, $this->items)) {
                return false;
            }
        }
        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function filter(callable $handler = null)
    {
        if ($handler) {
            if (defined("ARRAY_FILTER_USE_BOTH")) {
                return new ArrayList(array_values(array_filter($this->items, $handler, ARRAY_FILTER_USE_BOTH)));
            } else {
                return new ArrayList(array_values(array_filter($this->items, $handler)));
            }
        }
        return new ArrayList(array_values(array_filter($this->items)));
    }

    /**
     * {@inheritdoc}
     */
    public function map(callable $handler)
    {
        return new ArrayList(array_map($handler, $this->items, array_keys($this->items)));
    }

    /**
     * {@inheritdoc}
     */
    public function reduce(callable $handler, $initial = null)
    {
        foreach ($this as $key => $item) {
            $initial = $handler($initial, $item, $key);
        }
        return $initial;
    }

    /**
     * {@inheritdoc}
     */
    public function groupBy(callable $handler)
    {
        $new = [];
        foreach ($this as $key => $item) {
            $groupName = call_user_func($handler, $item, $key);
            if (!isset($new[$groupName])) {
                $new[$groupName] = new ArrayList();
            }
            $new[$groupName][] = $item;
        }
        return new ArrayMap($new);
    }

    /**
     * {@inheritdoc}
     */
    public function keyBy(callable $handler)
    {
        $new = [];
        foreach ($this as $key => $item) {
            $keyName = call_user_func($handler, $item, $key);
            $new[$keyName] = $item;
        }
        return new ArrayMap($new);
    }

    /**
     * {@inheritdoc}
     */
    public function combine(ListInterface $list)
    {
        return new ArrayMap(array_combine($this->items, $list->all()));
    }

    /**
     * {@inheritdoc}
     */
    public function first(callable $handler = null, $default = null)
    {
        if ($handler) {
            foreach ($this->items as $key => $item) {
                if (call_user_func($handler, $item, $key)) {
                    return $item;
                }
            }
            return $default;
        }
        return isset($this->items[0]) ? $this->items[0] : $default;
    }

    /**
     * {@inheritdoc}
     */
    public function last(callable $handler = null, $default = null)
    {
        if ($handler) {
            $length = count($this->items);
            for ($i = 0; $i < $length; $i++) {
                $key = $length - $i - 1;
                $item = $this->items[$key];
                if (call_user_func($handler, $item, $key)) {
                    return $item;
                }
            }
            return $default;
        }
        return ($length = count($this->items)) ? $this->items[$length - 1] : $default;
    }

    /**
     * {@inheritdoc}
     */
    public function intersect(ListInterface $list)
    {
        return new ArrayList(array_intersect($this->items, $list->all()));
    }

    /**
     * {@inheritdoc}
     */
    public function union(ListInterface $list)
    {
        return new ArrayList(array_unique_union($this->items, $list->all()));
    }

    /**
     * {@inheritdoc}
     */
    public function merge(ListInterface $list)
    {
        return new ArrayList(array_merge($this->items, $list->all()));
    }

    /**
     * {@inheritdoc}
     */
    public function implode($glue = null)
    {
        return implode($glue, $this->items);
    }

    /**
     * {@inheritdoc}
     */
    public function isEmpty()
    {
        return $this->count() === 0;
    }

    /**
     * {@inheritdoc}
     */
    public function pop()
    {
        return array_pop($this->items);
    }

    /**
     * {@inheritdoc}
     */
    public function push(...$values)
    {
        $this->items = array_merge($this->items, $values);
        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function shift()
    {
        return array_shift($this->items);
    }

    /**
     * {@inheritdoc}
     */
    public function unshift(...$values)
    {
        $this->items = array_merge(array_reverse($values), $this->items);
        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function reverse()
    {
        return new ArrayList(array_reverse($this->items));
    }

    /**
     * {@inheritdoc}
     */
    public function shuffle()
    {
        $items = $this->items;
        shuffle($items);
        return new ArrayList($items);
    }

    /**
     * {@inheritdoc}
     */
    public function sort(callable $callback = null)
    {
        $items = $this->items;
        if ($callback) {
            usort($items, $callback);
        } else {
            sort($items);
        }
        return new ArrayList($items);
    }
    
    /**
     * {@inheritdoc}
     */
    public function slice($offset, $length = null)
    {
        return new ArrayList(array_slice($this->items, $offset, $length));
    }

    /**
     * {@inheritdoc}
     */
    public function splice($offset, $length = null, $replacement = null)
    {
        if ($length) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
            return new ArrayList(array_splice($this->items, $offset, $length, $replacement));
        }
        return new ArrayList(array_splice($this->items, $offset));
    }
    
    /**
     * {@inheritdoc}
     */
    public function unique()
    {
        return new ArrayList(array_unique($this->items));
    }
    
    /**
     * @param mixed $value
     * @param string $method
     * @param int $order
     */
    private function assertIsNullOrIntegerLessSize($value, $method, $order = 1)
    {
        if (!isset($value)) {
            return;
        }
        if (is_int($value) && $value <= $this->count()) {
            return;
        }
        if (is_string($value)) {
            if ($value == (((int) $value) . '') && $value <= $this->count()) {
                return;
            }
        }
        throw new InvalidArgumentException("Argument {$order} passed to {$method} must be null or an integer less than the size of the list");
    }
}


1		<?php
2		namespace Wandu\Collection;
3
4		use InvalidArgumentException;
5		use Traversable;
6		use Wandu\Collection\Contracts\ListInterface;
7
8		class ArrayList implements ListInterface
9		{
10		/** @var array */
11		protected $items;
12
13		/**
14		* @param array\|\Traversable $items
15		*/
16	53	public function __construct($items = [])
17		{
18	53	if ($items instanceof Traversable) {
19	4	$this->items = iterator_to_array($items); // for lazy iterate
20		} else {
21	52	$this->items = array_values($items);
22		}
23	53	}
24
25		/**
26		* {@inheritdoc}
27		*/
28	1	public function __toString()
29		{
30	1	$string = static::class . " [\n";
31	1	foreach ($this as $item) {
32	1	$string .= " ";
33	1	if (is_string($item)) {
34	1	$string .= "\"{$item}\",\n";
35	1	} elseif (is_scalar($item)) {
36	1	$string .= "{$item},\n";
37	1	} elseif (is_null($item)) {
38	1	$string .= "null,\n";
39	1	} elseif (is_array($item)) {
40	1	$string .= "[array],\n";
41	1	} elseif (is_object($item)) {
42	1	$string .= "[" . get_class($item) . "],\n";
43		} else {
44	1	$string .= "[unknown],\n";
45		}
46		}
47	1	return $string . ']';
48		}
49
50		/**
51		* {@inheritdoc}
52		*/
53	43	public function toArray()
54		{
55	43	$arr = [];
56	43	foreach ($this as $item) {
57	43	if (method_exists($item, 'toArray')) {
58	1	$arr[] = $item->toArray();
59		} else {
60	43	$arr[] = $item;
61		}
62		}
63	43	return $arr;
64		}
65
66		/**
67		* {@inheritdoc}
68		*/
69	22	public function all()
70		{
71	22	return $this->items;
72		}
73
74		/**
75		* {@inheritdoc}
76		*/
77	7	public function count()
78		{
79	7	return count($this->items);
80		}
81
82		/**
83		* {@inheritdoc}
84		*/
85	1	function jsonSerialize()
86		{
87	1	return $this->all(); // safe
88		}
89
90		/**
91		* {@inheritdoc}
92		*/
93	49	public function getIterator()
94		{
95	49	foreach ($this->items as $item) {
96	49	yield $item;
97		}
98	49	}
99
100		/**
101		* {@inheritdoc}
102		*/
103	1	public function offsetExists($offset)
104		{
105	1	return isset($this->items[$offset]);
106		}
107
108		/**
109		* {@inheritdoc}
110		*/
111	4	public function offsetGet($offset)
112		{
113	4	return $this->get($offset);
114		}
115
116		/**
117		* {@inheritdoc}
118		*/
119	4	public function offsetSet($offset, $value)
120		{
121	4	$this->assertIsNullOrIntegerLessSize($offset, __METHOD__);
122	4	$this->set($offset, $value);
123	4	}
124
125		/**
126		* {@inheritdoc}
127		*/
128	1	public function offsetUnset($offset)
129		{
130	1	$this->remove($offset);
131	1	}
132
133		/**
134		* {@inheritdoc}
135		*/
136	1	public function serialize()
137		{
138	1	return serialize($this->items);
139		}
140
141		/**
142		* {@inheritdoc}
143		*/
144	1	public function unserialize($serialized)
145		{
146	1	$this->items = unserialize($serialized);
147	1	}
148
149		/**
150		* {@inheritdoc}
151		*/
152		public function clear()
153		{
154		$this->items = [];
155		}
156
157		/**
158		* {@inheritdoc}
159		*/
160	3	public function contains(...$values)
161		{
162	3	foreach ($values as $value) {
163	3	if (!in_array($value, $this->items, true)) {
164	3	return false;
165		}
166		}
167	3	return true;
168		}
169
170		/**
171		* {@inheritdoc}
172		*/
173	5	public function get($key, $default = null)
174		{
175	5	return array_key_exists($key, $this->items) ? $this->items[$key] : $default;
176		}
177
178		/**
179		* {@inheritdoc}
180		*/
181	6	public function set($key, $value)
182		{
183	6	if (isset($key)) {
184	3	$this->items[(int) $key] = $value;
185		} else {
186	4	$this->items[] = $value;
187		}
188	6	}
189
190		/**
191		* {@inheritdoc}
192		*/
193	2	public function remove(...$keys)
194		{
195	2	foreach ($keys as $key) {
196	2	unset($this->items[$key]);
197		}
198	2	$this->items = array_values($this->items);
199	2	}
200
201		/**
202		* {@inheritdoc}
203		*/
204	1	public function has(...$keys)
205		{
206	1	foreach ($keys as $key) {
207	1	if (!array_key_exists($key, $this->items)) {
208	1	return false;
209		}
210		}
211	1	return true;
212		}
213
214		/**
215		* {@inheritdoc}
216		*/
217	1	public function filter(callable $handler = null)
218		{
219	1	if ($handler) {
220	1	if (defined("ARRAY_FILTER_USE_BOTH")) {
221	1	return new ArrayList(array_values(array_filter($this->items, $handler, ARRAY_FILTER_USE_BOTH)));
222		} else {
223		return new ArrayList(array_values(array_filter($this->items, $handler)));
224		}
225		}
226	1	return new ArrayList(array_values(array_filter($this->items)));
227		}
228
229		/**
230		* {@inheritdoc}
231		*/
232	3	public function map(callable $handler)
233		{
234	3	return new ArrayList(array_map($handler, $this->items, array_keys($this->items)));
235		}
236
237		/**
238		* {@inheritdoc}
239		*/
240	1	public function reduce(callable $handler, $initial = null)
241		{
242	1	foreach ($this as $key => $item) {
243	1	$initial = $handler($initial, $item, $key);
244		}
245	1	return $initial;
246		}
247
248		/**
249		* {@inheritdoc}
250		*/
251	2	public function groupBy(callable $handler)
252		{
253	2	$new = [];
254	2	foreach ($this as $key => $item) {
255	2	$groupName = call_user_func($handler, $item, $key);
256	2	if (!isset($new[$groupName])) {
257	2	$new[$groupName] = new ArrayList();
258		}
259	2	$new[$groupName][] = $item;
260		}
261	2	return new ArrayMap($new);
262		}
263
264		/**
265		* {@inheritdoc}
266		*/
267	2	public function keyBy(callable $handler)
268		{
269	2	$new = [];
270	2	foreach ($this as $key => $item) {
271	2	$keyName = call_user_func($handler, $item, $key);
272	2	$new[$keyName] = $item;
273		}
274	2	return new ArrayMap($new);
275		}
276
277		/**
278		* {@inheritdoc}
279		*/
280	4	public function combine(ListInterface $list)
281		{
282	4	return new ArrayMap(array_combine($this->items, $list->all()));
283		}
284
285		/**
286		* {@inheritdoc}
287		*/
288	2	public function first(callable $handler = null, $default = null)
289		{
290	2	if ($handler) {
291	2	foreach ($this->items as $key => $item) {
292	2	if (call_user_func($handler, $item, $key)) {
293	2	return $item;
294		}
295		}
296	2	return $default;
297		}
298	2	return isset($this->items[0]) ? $this->items[0] : $default;
299		}
300
301		/**
302		* {@inheritdoc}
303		*/
304	2	public function last(callable $handler = null, $default = null)
305		{
306	2	if ($handler) {
307	2	$length = count($this->items);
308	2	for ($i = 0; $i < $length; $i++) {
309	2	$key = $length - $i - 1;
310	2	$item = $this->items[$key];
311	2	if (call_user_func($handler, $item, $key)) {
312	2	return $item;
313		}
314		}
315	2	return $default;
316		}
317	2	return ($length = count($this->items)) ? $this->items[$length - 1] : $default;
318		}
319
320		/**
321		* {@inheritdoc}
322		*/
323	8	public function intersect(ListInterface $list)
324		{
325	8	return new ArrayList(array_intersect($this->items, $list->all()));
326		}
327
328		/**
329		* {@inheritdoc}
330		*/
331	4	public function union(ListInterface $list)
332		{
333	4	return new ArrayList(array_unique_union($this->items, $list->all()));
334		}
335
336		/**
337		* {@inheritdoc}
338		*/
339	4	public function merge(ListInterface $list)
340		{
341	4	return new ArrayList(array_merge($this->items, $list->all()));
342		}
343
344		/**
345		* {@inheritdoc}
346		*/
347	2	public function implode($glue = null)
348		{
349	2	return implode($glue, $this->items);
350		}
351
352		/**
353		* {@inheritdoc}
354		*/
355	2	public function isEmpty()
356		{
357	2	return $this->count() === 0;
358		}
359
360		/**
361		* {@inheritdoc}
362		*/
363	3	public function pop()
364		{
365	3	return array_pop($this->items);
366		}
367
368		/**
369		* {@inheritdoc}
370		*/
371	1	public function push(...$values)
372		{
373	1	$this->items = array_merge($this->items, $values);
374	1	return $this;
375		}
376
377		/**
378		* {@inheritdoc}
379		*/
380	1	public function shift()
381		{
382	1	return array_shift($this->items);
383		}
384
385		/**
386		* {@inheritdoc}
387		*/
388	1	public function unshift(...$values)
389		{
390	1	$this->items = array_merge(array_reverse($values), $this->items);
391	1	return $this;
392		}
393
394		/**
395		* {@inheritdoc}
396		*/
397	2	public function reverse()
398		{
399	2	return new ArrayList(array_reverse($this->items));
400		}
401
402		/**
403		* {@inheritdoc}
404		*/
405	2	public function shuffle()
406		{
407	2	$items = $this->items;
408	2	shuffle($items);
409	2	return new ArrayList($items);
410		}
411
412		/**
413		* {@inheritdoc}
414		*/
415	1	public function sort(callable $callback = null)
416		{
417	1	$items = $this->items;
418	1	if ($callback) {
419	1	usort($items, $callback);
420		} else {
421	1	sort($items);
422		}
423	1	return new ArrayList($items);
424		}
425
426		/**
427		* {@inheritdoc}
428		*/
429	2	public function slice($offset, $length = null)
430		{
431	2	return new ArrayList(array_slice($this->items, $offset, $length));
432		}
433
434		/**
435		* {@inheritdoc}
436		*/
437	4	public function splice($offset, $length = null, $replacement = null)
438		{
439	4	if ($length) {
		0 ignored issues – show Bug Best Practice introduced 2016-12-01 03:14 UTC by Report Bug Copy Issue Report The expression `$length` of type `integer\|null` is loosely compared to `true`; this is ambiguous if the integer can be zero. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `integer` values, zero is a special case, in particular the following results might be unexpected: 0 == false // true 0 == null // true 123 == false // false 123 == null // false // It is often better to use strict comparison 0 === false // false 0 === null // false Loading history...
440	2	return new ArrayList(array_splice($this->items, $offset, $length, $replacement));
441		}
442	2	return new ArrayList(array_splice($this->items, $offset));
443		}
444
445		/**
446		* {@inheritdoc}
447		*/
448	1	public function unique()
449		{
450	1	return new ArrayList(array_unique($this->items));
451		}
452
453		/**
454		* @param mixed $value
455		* @param string $method
456		* @param int $order
457		*/
458	4	private function assertIsNullOrIntegerLessSize($value, $method, $order = 1)
459		{
460	4	if (!isset($value)) {
461	4	return;
462		}
463	1	if (is_int($value) && $value <= $this->count()) {
464	1	return;
465		}
466	1	if (is_string($value)) {
467	1	if ($value == (((int) $value) . '') && $value <= $this->count()) {
468		return;
469		}
470		}
471	1	throw new InvalidArgumentException("Argument {$order} passed to {$method} must be null or an integer less than the size of the list");
472		}
473		}
474

Wandu / Framework

ArrayList::isEmpty() A last analyzed 2018-03-08 03:43 UTC

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ArrayList::isEmpty() A
last analyzed 2018-03-08 03:43 UTC