Sequence::calculateUnion() - Code Metrics - Inspection of "Merge pull request #73 from thephpleague/feature/e..." - thephpleague/period - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( a2f7a7...4d2430 )

by ignace nyamagana

created 2019-01-16 20:24 UTC

Sequence::calculateUnion() A

↳ Parent: Sequence

Complexity

Conditions	4
Paths	3

Size

Total Lines	19
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	4

Importance

Changes

Metric	Value
cc	4
eloc	10
nc	3
nop	2
dl	0
loc	19
ccs	11
cts	11
cp	1
crap	4
rs	9.9332
c	0
b	0
f	0

<?php

/**
 * League.Period (https://period.thephpleague.com)
 *
 * (c) Ignace Nyamagana Butera <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace League\Period;

use ArrayAccess;
use Countable;
use Iterator;
use IteratorAggregate;
use JsonSerializable;
use function array_filter;
use function array_merge;
use function array_splice;
use function array_unshift;
use function array_values;
use function count;
use function reset;
use function sort;
use function sprintf;
use function uasort;
use function usort;
use const ARRAY_FILTER_USE_BOTH;

/**
 * A class to manipulate interval collection.
 *
 * @package League.period
 * @author  Ignace Nyamagana Butera <[email protected]>
 * @since   4.1.0
 */
final class Sequence implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
{
    /**
     * @var Period[]
     */
    private $intervals = [];

    /**
     * new instance.
     *
     * @param Period ...$intervals
     */
    public function __construct(Period ...$intervals)
    {
        $this->intervals = $intervals;
    }

    /**
     * Returns the sequence boundaries as a Period instance.
     *
     * If the sequence contains no interval null is returned.
     *
     * @return ?Period
     */
    public function boundaries(): ?Period
    {
        $period = reset($this->intervals);
        if (false === $period) {
            return null;
        }

        return $period->merge(...$this->intervals);
    }

    /**
     * Returns the gaps inside the instance.
     */
    public function gaps(): self
    {
        $sequence = new self();
        $interval = null;
        foreach ($this->sorted([$this, 'sortByStartDate']) as $period) {
            if (null === $interval) {
                $interval = $period;
                continue;
            }

            if (!$interval->overlaps($period) && !$interval->abuts($period)) {
                $sequence->push($interval->gap($period));
            }

            if (!$interval->contains($period)) {
                $interval = $period;
            }
        }

        return $sequence;
    }

    /**
     * Sorts two Interval instance using their start datepoint.
     */
    private function sortByStartDate(Period $interval1, Period $interval2): int
    {
        return $interval1->getStartDate() <=> $interval2->getStartDate();
    }

    /**
     * Returns the intersections inside the instance.
     */
    public function intersections(): self
    {
        $sequence = new self();
        $current = null;
        $isPreviouslyContained = false;
        foreach ($this->sorted([$this, 'sortByStartDate']) as $period) {
            if (null === $current) {
                $current = $period;
                continue;
            }

            $isContained = $current->contains($period);
            if ($isContained && $isPreviouslyContained) {
                continue;
            }

            if ($current->overlaps($period)) {
                $sequence->push($current->intersect($period));
            }

            $isPreviouslyContained = $isContained;
            if (!$isContained) {
                $current = $period;
            }
        }

        return $sequence;
    }

    /**
     * Returns the unions inside the instance.
     */
    public function unions(): self
    {
        $sequence = $this
            ->sorted([$this, 'sortByStartDate'])
            ->reduce([$this, 'calculateUnion'], new self())
        ;

        if ($sequence->intervals === $this->intervals) {
            return $this;
        }

        return $sequence;
    }

    /**
     * Iteratively calculate the union sequence.
     */
    private function calculateUnion(Sequence $sequence, Period $period): Sequence
    {
        if ($sequence->isEmpty()) {
            $sequence->push($period);

            return $sequence;
        }

        $index = $sequence->count() - 1;
        $interval = $sequence->get($index);
        if ($interval->overlaps($period) || $interval->abuts($period)) {
            $sequence->set($index, $interval->merge($period));

            return $sequence;
        }

        $sequence->push($period);

        return $sequence;
    }

    /**
     * Returns the sequence boundaries as a Period instance.
     *
     * DEPRECATION WARNING! This method will be removed in the next major point release
     *
     * @deprecated deprecated since version 4.4.0
     * @see        ::boundaries
     *
     * If the sequence contains no interval null is returned.
     *
     * @return ?Period
     */
    public function getBoundaries(): ?Period
    {
        return $this->boundaries();
    }

    /**
     * Returns the intersections inside the instance.
     *
     * DEPRECATION WARNING! This method will be removed in the next major point release
     *
     * @deprecated deprecated since version 4.4.0
     * @see        ::intersections
     */
    public function getIntersections(): self
    {
        return $this->intersections();
    }

    /**
     * Returns the gaps inside the instance.
     *
     * DEPRECATION WARNING! This method will be removed in the next major point release
     *
     * @deprecated deprecated since version 4.4.0
     * @see        ::gaps
     */
    public function getGaps(): self
    {
        return $this->gaps();
    }

    /**
     * Tells whether some intervals in the current instance satisfies the predicate.
     */
    public function some(callable $predicate): bool
    {
        foreach ($this->intervals as $offset => $interval) {
            if (true === $predicate($interval, $offset)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Tells whether all intervals in the current instance satisfies the predicate.
     */
    public function every(callable $predicate): bool
    {
        foreach ($this->intervals as $offset => $interval) {
            if (true !== $predicate($interval, $offset)) {
                return false;
            }
        }

        return [] !== $this->intervals;
    }

    /**
     * Returns the array representation of the sequence.
     *
     * @return Period[]
     */
    public function toArray(): array
    {
        return $this->intervals;
    }

    /**
     * {@inheritdoc}
     */
    public function jsonSerialize(): array
    {
        return $this->intervals;
    }

    /**
     * {@inheritdoc}
     */
    public function getIterator(): Iterator
    {
        foreach ($this->intervals as $offset => $interval) {
            yield $offset => $interval;
        }
    }

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

    /**
     * @inheritdoc
     *
     * @param int $offset
     */
    public function offsetExists($offset): bool
    {
        return isset($this->intervals[$offset]);
    }

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

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

    /**
     * @inheritdoc
     *
     * @param mixed|int $offset
     * @param Period    $interval
     */
    public function offsetSet($offset, $interval): void
    {
        if (null !== $offset) {
            $this->set($offset, $interval);
            return;
        }

        $this->push($interval);
    }

    /**
     * Tells whether the sequence is empty.
     */
    public function isEmpty(): bool
    {
        return [] === $this->intervals;
    }

    /**
     * Tells whether the given interval is present in the sequence.
     *
     * @param Period ...$intervals
     */
    public function contains(Period $interval, Period ...$intervals): bool
    {
        $intervals[] = $interval;
        foreach ($intervals as $period) {
            if (false === $this->indexOf($period)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Attempts to find the first offset attached to the submitted interval.
     *
     * If no offset is found the method returns boolean false.
     *
     * @return int|bool
     */
    public function indexOf(Period $interval)
    {
        foreach ($this->intervals as $offset => $period) {
            if ($period->equals($interval)) {
                return $offset;
            }
        }

        return false;
    }

    /**
     * Returns the interval specified at a given offset.
     *
     * @throws InvalidIndex If the offset is illegal for the current sequence
     */
    public function get(int $offset): Period
    {
        $period = $this->intervals[$offset] ?? null;
        if (null !== $period) {
            return $period;
        }

        throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset));
    }

    /**
     * Sort the current instance according to the given comparison callable
     * and maintain index association.
     *
     * Returns true on success or false on failure
     */
    public function sort(callable $compare): bool
    {
        return uasort($this->intervals, $compare);
    }

    /**
     * Adds new intervals at the front of the sequence.
     *
     * The sequence is re-indexed after addition
     *
     * @param Period ...$intervals
     */
    public function unshift(Period $interval, Period ...$intervals): void
    {
        $this->intervals = array_merge([$interval], $intervals, $this->intervals);
    }

    /**
     * Adds new intervals at the end of the sequence.
     *
     * @param Period ...$intervals
     */
    public function push(Period $interval, Period ...$intervals): void
    {
        $this->intervals = array_merge($this->intervals, [$interval], $intervals);
    }

    /**
     * Inserts new intervals at the specified offset of the sequence.
     *
     * The sequence is re-indexed after addition
     *
     * @param Period ...$intervals
     *
     * @throws InvalidIndex If the offset is illegal for the current sequence.
     */
    public function insert(int $offset, Period $interval, Period ...$intervals): void
    {
        if ($offset < 0 || $offset > count($this->intervals)) {
            throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset));
        }

        array_unshift($intervals, $interval);
        array_splice($this->intervals, $offset, 0, $intervals);
    }

    /**
     * Updates the interval at the specify offset.
     *
     * @throws InvalidIndex If the offset is illegal for the current sequence.
     */
    public function set(int $offset, Period $interval): void
    {
        $this->get($offset);
        $this->intervals[$offset] = $interval;
    }

    /**
     * Removes an interval from the sequence at the given offset and returns it.
     *
     * The sequence is re-indexed after removal
     *
     * @throws InvalidIndex If the offset is illegal for the current sequence.
     */
    public function remove(int $offset): Period
    {
        $interval = $this->get($offset);
        unset($this->intervals[$offset]);

        $this->intervals = array_values($this->intervals);

        return $interval;
    }

    /**
     * Filters the sequence according to the given predicate.
     *
     * This method MUST retain the state of the current instance, and return
     * an instance that contains the interval which validate the predicate.
     */
    public function filter(callable $predicate): self
    {
        $intervals = array_filter($this->intervals, $predicate, ARRAY_FILTER_USE_BOTH);
        if ($intervals === $this->intervals) {
            return $this;
        }

        return new self(...$intervals);
    }

    /**
     * Removes all intervals from the sequence.
     */
    public function clear(): void
    {
        $this->intervals = [];
    }

    /**
     * Returns an instance sorted according to the given comparison callable
     * but does not maintain index association.
     *
     * This method MUST retain the state of the current instance, and return
     * an instance that contains the sorted intervals. The key are re-indexed
     */
    public function sorted(callable $compare): self
    {
        $intervals = $this->intervals;
        usort($intervals, $compare);
        if ($intervals === $this->intervals) {
            return $this;
        }

        return new self(...$intervals);
    }

    /**
     * Returns an instance where the given function is applied to each element in
     * the collection. The callable MUST return a Period object and takes a Period
     * and its associated key as argument.
     *
     * This method MUST retain the state of the current instance, and return
     * an instance that contains the returned intervals.
     */
    public function map(callable $func): self
    {
        $intervals = [];
        foreach ($this->intervals as $offset => $interval) {
            $intervals[$offset] = $func($interval, $offset);
        }

        if ($intervals === $this->intervals) {
            return $this;
        }

        $mapped = new self();
        $mapped->intervals = $intervals;

        return $mapped;
    }

    /**
     * Iteratively reduces the sequence to a single value using a callback.
     *
     * @param callable $func Accepts the carry, the current value and the current offset, and
     *                       returns an updated carry value.
     *
     * @param mixed|null $carry Optional initial carry value.
     *
     * @return mixed The carry value of the final iteration, or the initial
     *               value if the sequence was empty.
     */
    public function reduce(callable $func, $carry = null)
    {
        foreach ($this->intervals as $offset => $interval) {
            $carry = $func($carry, $interval, $offset);
        }

        return $carry;
    }
}


1		<?php
2
3		/**
4		* League.Period (https://period.thephpleague.com)
5		*
6		* (c) Ignace Nyamagana Butera <[email protected]>
7		*
8		* For the full copyright and license information, please view the LICENSE
9		* file that was distributed with this source code.
10		*/
11
12		declare(strict_types=1);
13
14		namespace League\Period;
15
16		use ArrayAccess;
17		use Countable;
18		use Iterator;
19		use IteratorAggregate;
20		use JsonSerializable;
21		use function array_filter;
22		use function array_merge;
23		use function array_splice;
24		use function array_unshift;
25		use function array_values;
26		use function count;
27		use function reset;
28		use function sort;
29		use function sprintf;
30		use function uasort;
31		use function usort;
32		use const ARRAY_FILTER_USE_BOTH;
33
34		/**
35		* A class to manipulate interval collection.
36		*
37		* @package League.period
38		* @author Ignace Nyamagana Butera <[email protected]>
39		* @since 4.1.0
40		*/
41		final class Sequence implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
42		{
43		/**
44		* @var Period[]
45		*/
46		private $intervals = [];
47
48		/**
49		* new instance.
50		*
51		* @param Period ...$intervals
52		*/
53	87	public function __construct(Period ...$intervals)
54		{
55	87	$this->intervals = $intervals;
56	87	}
57
58		/**
59		* Returns the sequence boundaries as a Period instance.
60		*
61		* If the sequence contains no interval null is returned.
62		*
63		* @return ?Period
64		*/
65	12	public function boundaries(): ?Period
66		{
67	12	$period = reset($this->intervals);
68	12	if (false === $period) {
69	6	return null;
70		}
71
72	12	return $period->merge(...$this->intervals);
73		}
74
75		/**
76		* Returns the gaps inside the instance.
77		*/
78	9	public function gaps(): self
79		{
80	9	$sequence = new self();
81	9	$interval = null;
82	9	foreach ($this->sorted([$this, 'sortByStartDate']) as $period) {
83	9	if (null === $interval) {
84	9	$interval = $period;
85	9	continue;
86		}
87
88	9	if (!$interval->overlaps($period) && !$interval->abuts($period)) {
89	6	$sequence->push($interval->gap($period));
90		}
91
92	9	if (!$interval->contains($period)) {
93	8	$interval = $period;
94		}
95		}
96
97	9	return $sequence;
98		}
99
100		/**
101		* Sorts two Interval instance using their start datepoint.
102		*/
103	15	private function sortByStartDate(Period $interval1, Period $interval2): int
104		{
105	15	return $interval1->getStartDate() <=> $interval2->getStartDate();
106		}
107
108		/**
109		* Returns the intersections inside the instance.
110		*/
111	9	public function intersections(): self
112		{
113	9	$sequence = new self();
114	9	$current = null;
115	9	$isPreviouslyContained = false;
116	9	foreach ($this->sorted([$this, 'sortByStartDate']) as $period) {
117	9	if (null === $current) {
118	9	$current = $period;
119	9	continue;
120		}
121
122	9	$isContained = $current->contains($period);
123	9	if ($isContained && $isPreviouslyContained) {
124	3	continue;
125		}
126
127	9	if ($current->overlaps($period)) {
128	6	$sequence->push($current->intersect($period));
129		}
130
131	9	$isPreviouslyContained = $isContained;
132	9	if (!$isContained) {
133	8	$current = $period;
134		}
135		}
136
137	9	return $sequence;
138		}
139
140		/**
141		* Returns the unions inside the instance.
142		*/
143	6	public function unions(): self
144		{
145		$sequence = $this
146	6	->sorted([$this, 'sortByStartDate'])
147	6	->reduce([$this, 'calculateUnion'], new self())
148		;
149
150	6	if ($sequence->intervals === $this->intervals) {
151	3	return $this;
152		}
153
154	3	return $sequence;
155		}
156
157		/**
158		* Iteratively calculate the union sequence.
159		*/
160	6	private function calculateUnion(Sequence $sequence, Period $period): Sequence
161		{
162	6	if ($sequence->isEmpty()) {
163	6	$sequence->push($period);
164
165	6	return $sequence;
166		}
167
168	3	$index = $sequence->count() - 1;
169	3	$interval = $sequence->get($index);
170	3	if ($interval->overlaps($period) \|\| $interval->abuts($period)) {
171	3	$sequence->set($index, $interval->merge($period));
172
173	3	return $sequence;
174		}
175
176	3	$sequence->push($period);
177
178	3	return $sequence;
179		}
180
181		/**
182		* Returns the sequence boundaries as a Period instance.
183		*
184		* DEPRECATION WARNING! This method will be removed in the next major point release
185		*
186		* @deprecated deprecated since version 4.4.0
187		* @see ::boundaries
188		*
189		* If the sequence contains no interval null is returned.
190		*
191		* @return ?Period
192		*/
193	12	public function getBoundaries(): ?Period
194		{
195	12	return $this->boundaries();
196		}
197
198		/**
199		* Returns the intersections inside the instance.
200		*
201		* DEPRECATION WARNING! This method will be removed in the next major point release
202		*
203		* @deprecated deprecated since version 4.4.0
204		* @see ::intersections
205		*/
206	9	public function getIntersections(): self
207		{
208	9	return $this->intersections();
209		}
210
211		/**
212		* Returns the gaps inside the instance.
213		*
214		* DEPRECATION WARNING! This method will be removed in the next major point release
215		*
216		* @deprecated deprecated since version 4.4.0
217		* @see ::gaps
218		*/
219	9	public function getGaps(): self
220		{
221	9	return $this->gaps();
222		}
223
224		/**
225		* Tells whether some intervals in the current instance satisfies the predicate.
226		*/
227	3	public function some(callable $predicate): bool
228		{
229	3	foreach ($this->intervals as $offset => $interval) {
230	3	if (true === $predicate($interval, $offset)) {
231	3	return true;
232		}
233		}
234
235	3	return false;
236		}
237
238		/**
239		* Tells whether all intervals in the current instance satisfies the predicate.
240		*/
241	3	public function every(callable $predicate): bool
242		{
243	3	foreach ($this->intervals as $offset => $interval) {
244	3	if (true !== $predicate($interval, $offset)) {
245	2	return false;
246		}
247		}
248
249	3	return [] !== $this->intervals;
250		}
251
252		/**
253		* Returns the array representation of the sequence.
254		*
255		* @return Period[]
256		*/
257	6	public function toArray(): array
258		{
259	6	return $this->intervals;
260		}
261
262		/**
263		* {@inheritdoc}
264		*/
265	3	public function jsonSerialize(): array
266		{
267	3	return $this->intervals;
268		}
269
270		/**
271		* {@inheritdoc}
272		*/
273	18	public function getIterator(): Iterator
274		{
275	18	foreach ($this->intervals as $offset => $interval) {
276	18	yield $offset => $interval;
277		}
278	18	}
279
280		/**
281		* {@inheritdoc}
282		*/
283	30	public function count(): int
284		{
285	30	return count($this->intervals);
286		}
287
288		/**
289		* @inheritdoc
290		*
291		* @param int $offset
292		*/
293	3	public function offsetExists($offset): bool
294		{
295	3	return isset($this->intervals[$offset]);
296		}
297
298		/**
299		* @inheritdoc
300		*
301		* @param int $offset
302		*/
303	3	public function offsetGet($offset): Period
304		{
305	3	return $this->get($offset);
306		}
307
308		/**
309		* @inheritdoc
310		*
311		* @param int $offset
312		*/
313	6	public function offsetUnset($offset): void
314		{
315	6	$this->remove($offset);
316	3	}
317
318		/**
319		* @inheritdoc
320		*
321		* @param mixed\|int $offset
322		* @param Period $interval
323		*/
324	9	public function offsetSet($offset, $interval): void
325		{
326	9	if (null !== $offset) {
327	9	$this->set($offset, $interval);
328	3	return;
329		}
330
331	3	$this->push($interval);
332	3	}
333
334		/**
335		* Tells whether the sequence is empty.
336		*/
337	15	public function isEmpty(): bool
338		{
339	15	return [] === $this->intervals;
340		}
341
342		/**
343		* Tells whether the given interval is present in the sequence.
344		*
345		* @param Period ...$intervals
346		*/
347	6	public function contains(Period $interval, Period ...$intervals): bool
348		{
349	6	$intervals[] = $interval;
350	6	foreach ($intervals as $period) {
351	6	if (false === $this->indexOf($period)) {
352	5	return false;
353		}
354		}
355
356	6	return true;
357		}
358
359		/**
360		* Attempts to find the first offset attached to the submitted interval.
361		*
362		* If no offset is found the method returns boolean false.
363		*
364		* @return int\|bool
365		*/
366	6	public function indexOf(Period $interval)
367		{
368	6	foreach ($this->intervals as $offset => $period) {
369	6	if ($period->equals($interval)) {
370	6	return $offset;
371		}
372		}
373
374	6	return false;
375		}
376
377		/**
378		* Returns the interval specified at a given offset.
379		*
380		* @throws InvalidIndex If the offset is illegal for the current sequence
381		*/
382	39	public function get(int $offset): Period
383		{
384	39	$period = $this->intervals[$offset] ?? null;
385	39	if (null !== $period) {
386	30	return $period;
387		}
388
389	15	throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset));
390		}
391
392		/**
393		* Sort the current instance according to the given comparison callable
394		* and maintain index association.
395		*
396		* Returns true on success or false on failure
397		*/
398	6	public function sort(callable $compare): bool
399		{
400	6	return uasort($this->intervals, $compare);
401		}
402
403		/**
404		* Adds new intervals at the front of the sequence.
405		*
406		* The sequence is re-indexed after addition
407		*
408		* @param Period ...$intervals
409		*/
410	3	public function unshift(Period $interval, Period ...$intervals): void
411		{
412	3	$this->intervals = array_merge([$interval], $intervals, $this->intervals);
413	3	}
414
415		/**
416		* Adds new intervals at the end of the sequence.
417		*
418		* @param Period ...$intervals
419		*/
420	24	public function push(Period $interval, Period ...$intervals): void
421		{
422	24	$this->intervals = array_merge($this->intervals, [$interval], $intervals);
423	24	}
424
425		/**
426		* Inserts new intervals at the specified offset of the sequence.
427		*
428		* The sequence is re-indexed after addition
429		*
430		* @param Period ...$intervals
431		*
432		* @throws InvalidIndex If the offset is illegal for the current sequence.
433		*/
434	3	public function insert(int $offset, Period $interval, Period ...$intervals): void
435		{
436	3	if ($offset < 0 \|\| $offset > count($this->intervals)) {
437	3	throw new InvalidIndex(sprintf('%s is an invalid offset in the current sequence', $offset));
438		}
439
440	3	array_unshift($intervals, $interval);
441	3	array_splice($this->intervals, $offset, 0, $intervals);
442	3	}
443
444		/**
445		* Updates the interval at the specify offset.
446		*
447		* @throws InvalidIndex If the offset is illegal for the current sequence.
448		*/
449	12	public function set(int $offset, Period $interval): void
450		{
451	12	$this->get($offset);
452	9	$this->intervals[$offset] = $interval;
453	9	}
454
455		/**
456		* Removes an interval from the sequence at the given offset and returns it.
457		*
458		* The sequence is re-indexed after removal
459		*
460		* @throws InvalidIndex If the offset is illegal for the current sequence.
461		*/
462	9	public function remove(int $offset): Period
463		{
464	9	$interval = $this->get($offset);
465	6	unset($this->intervals[$offset]);
466
467	6	$this->intervals = array_values($this->intervals);
468
469	6	return $interval;
470		}
471
472		/**
473		* Filters the sequence according to the given predicate.
474		*
475		* This method MUST retain the state of the current instance, and return
476		* an instance that contains the interval which validate the predicate.
477		*/
478	6	public function filter(callable $predicate): self
479		{
480	6	$intervals = array_filter($this->intervals, $predicate, ARRAY_FILTER_USE_BOTH);
481	6	if ($intervals === $this->intervals) {
482	3	return $this;
483		}
484
485	3	return new self(...$intervals);
486		}
487
488		/**
489		* Removes all intervals from the sequence.
490		*/
491	3	public function clear(): void
492		{
493	3	$this->intervals = [];
494	3	}
495
496		/**
497		* Returns an instance sorted according to the given comparison callable
498		* but does not maintain index association.
499		*
500		* This method MUST retain the state of the current instance, and return
501		* an instance that contains the sorted intervals. The key are re-indexed
502		*/
503	24	public function sorted(callable $compare): self
504		{
505	24	$intervals = $this->intervals;
506	24	usort($intervals, $compare);
507	24	if ($intervals === $this->intervals) {
508	12	return $this;
509		}
510
511	15	return new self(...$intervals);
512		}
513
514		/**
515		* Returns an instance where the given function is applied to each element in
516		* the collection. The callable MUST return a Period object and takes a Period
517		* and its associated key as argument.
518		*
519		* This method MUST retain the state of the current instance, and return
520		* an instance that contains the returned intervals.
521		*/
522	9	public function map(callable $func): self
523		{
524	9	$intervals = [];
525	9	foreach ($this->intervals as $offset => $interval) {
526	9	$intervals[$offset] = $func($interval, $offset);
527		}
528
529	9	if ($intervals === $this->intervals) {
530	3	return $this;
531		}
532
533	6	$mapped = new self();
534	6	$mapped->intervals = $intervals;
535
536	6	return $mapped;
537		}
538
539		/**
540		* Iteratively reduces the sequence to a single value using a callback.
541		*
542		* @param callable $func Accepts the carry, the current value and the current offset, and
543		* returns an updated carry value.
544		*
545		* @param mixed\|null $carry Optional initial carry value.
546		*
547		* @return mixed The carry value of the final iteration, or the initial
548		* value if the sequence was empty.
549		*/
550	6	public function reduce(callable $func, $carry = null)
551		{
552	6	foreach ($this->intervals as $offset => $interval) {
553	6	$carry = $func($carry, $interval, $offset);
554		}
555
556	6	return $carry;
557		}
558		}
559

thephpleague / period

Push — master ( a2f7a7...4d2430 )

Sequence::calculateUnion() A

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