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<?php namespace GenericCollections\Abstracts; |
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use GenericCollections\Collection; |
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use GenericCollections\Interfaces\MapInterface; |
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use GenericCollections\Internal\DataArray; |
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use GenericCollections\Set; |
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abstract class AbstractMap extends DataArray implements MapInterface, \ArrayAccess |
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{ |
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public function containsKey($key) |
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{ |
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return $this->checkKeyType($key) && array_key_exists($key, $this->data); |
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} |
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public function containsValue($value) |
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{ |
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return in_array($value, $this->data, $this->optionComparisonIsIdentical()); |
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} |
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public function get($key) |
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{ |
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return $this->containsKey($key) ? $this->data[$key] : null; |
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} |
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public function getOrDefault($key, $default) |
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{ |
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if ($this->containsKey($key)) { |
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return $this->data[$key]; |
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} |
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if (null !== $default && ! $this->checkValueType($default)) { |
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throw new \InvalidArgumentException( |
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'The default value provided for ' |
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. get_class($this) . '::getOrDefault is not a valid type,' |
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. ' expected ' . $this->getKeyType() . '.' |
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); |
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} |
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return $default; |
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} |
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public function keys() |
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{ |
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return array_keys($this->data); |
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} |
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public function put($key, $value) |
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{ |
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if (! $this->checkKeyType($key)) { |
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throw new \InvalidArgumentException( |
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'The key provided for ' . get_class($this) |
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. '::put is not a valid type,' |
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. ' expected ' . $this->getKeyType() . '.' |
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); |
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} |
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if (! $this->checkValueType($value)) { |
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throw new \InvalidArgumentException( |
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'The value provided for ' . get_class($this) |
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. '::put is not a valid type,' |
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. ' expected ' . $this->getValueType() . '.' |
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); |
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} |
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if ($this->optionUniqueValues() and $this->containsValue($value)) { |
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throw new \InvalidArgumentException( |
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'The value provided for ' . get_class($this) |
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. '::put is not unique,' |
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. ' this map does not allow duplicated values.' |
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); |
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} |
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$previous = $this->get($key); |
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$this->data[$key] = $value; |
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return $previous; |
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} |
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public function putAll(array $values) |
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{ |
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foreach ($values as $key => $value) { |
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$this->put($key, $value); |
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} |
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} |
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public function putIfAbsent($key, $value) |
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{ |
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$current = $this->get($key); |
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if (null !== $current) { |
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return $current; |
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} |
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$this->put($key, $value); |
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return null; |
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} |
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public function remove($key) |
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{ |
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$previous = $this->get($key); |
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if ($previous !== null) { |
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unset($this->data[$key]); |
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} |
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return $previous; |
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} |
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public function removeExact($key, $value) |
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{ |
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$changed = false; |
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$previous = $this->get($key); |
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$isequal = ($this->optionComparisonIsIdentical()) |
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? ($previous === $value) |
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: ($previous == $value); |
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if ($isequal) { |
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unset($this->data[$key]); |
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$changed = true; |
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} |
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return $changed; |
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} |
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public function replace($key, $value) |
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{ |
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return ($this->containsKey($key)) ? $this->put($key, $value) : null; |
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} |
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public function replaceExact($key, $current, $replacement) |
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{ |
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if (! $this->containsKey($key)) { |
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return false; |
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} |
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$previous = $this->get($key); |
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$isequal = ($this->optionComparisonIsIdentical()) |
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? ($previous === $current) |
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: ($previous == $current); |
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if ($isequal) { |
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$this->put($key, $replacement); |
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return true; |
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} |
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return false; |
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} |
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public function keysSet() |
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{ |
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return new Set($this->getKeyType(), $this->keys()); |
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} |
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public function valuesCollection() |
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{ |
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return new Collection($this->getValueType(), $this->toArray()); |
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} |
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/* |
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* Implementations from \ArrayAccess |
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*/ |
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/** @inheritdoc */ |
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public function offsetExists($offset) |
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{ |
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return $this->containsKey($offset); |
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} |
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/** @inheritdoc */ |
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public function offsetGet($offset) |
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{ |
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return $this->get($offset); |
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} |
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/** @inheritdoc */ |
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public function offsetSet($offset, $value) |
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{ |
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$this->put($offset, $value); |
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} |
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/** @inheritdoc */ |
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public function offsetUnset($offset) |
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{ |
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$this->remove($offset); |
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} |
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} |
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PHP has two types of connecting operators (logical operators, and boolean operators):
and
&&
or
||
The difference between these is the order in which they are executed. In most cases, you would want to use a boolean operator like
&&
, or||
.Let’s take a look at a few examples:
Logical Operators are used for Control-Flow
One case where you explicitly want to use logical operators is for control-flow such as this:
Since
die
introduces problems of its own, f.e. it makes our code hardly testable, and prevents any kind of more sophisticated error handling; you probably do not want to use this in real-world code. Unfortunately, logical operators cannot be combined withthrow
at this point:These limitations lead to logical operators rarely being of use in current PHP code.