Class Collection
A collection is an immutable list of elements with a handful of functions to iterate, group, transform and extract information from it.
- IteratorIterator implements Iterator, Traversable, OuterIterator
- Cake\Collection\Collection implements Cake\Collection\CollectionInterface, Serializable uses Cake\Collection\CollectionTrait
Direct Subclasses
- Cake\Collection\Iterator\BufferedIterator
- Cake\Collection\Iterator\ExtractIterator
- Cake\Collection\Iterator\FilterIterator
- Cake\Collection\Iterator\InsertIterator
- Cake\Collection\Iterator\NestIterator
- Cake\Collection\Iterator\NoChildrenIterator
- Cake\Collection\Iterator\ReplaceIterator
- Cake\Collection\Iterator\SortIterator
- Cake\Datasource\ResultSetDecorator
Method Summary
- __construct() publicConstructor. You can provide an array or any traversable object
- __debugInfo() public
Returns an array that can be used to describe the internal state of this object.
- count() publicThrows an exception.
- serialize() public
Returns a string representation of this object that can be used to reconstruct it
- unserialize() publicUnserializes the passed string and rebuilds the Collection instance
Method Detail
__construct()source public
__construct( array|Traversable $items )
Constructor. You can provide an array or any traversable object
Parameters
- array|Traversable
$items
- Items.
Throws
InvalidArgumentExceptionIf passed incorrect type for items.
Overrides
IteratorIterator::__construct()
__debugInfo()source public
__debugInfo( )
Returns an array that can be used to describe the internal state of this object.
Returns
arraycount()source public
count( )
Throws an exception.
Issuing a count on a Collection can have many side effects, some making the Collection unusable after the count operation.
Throws
LogicExceptionserialize()source public
serialize( )
Returns a string representation of this object that can be used to reconstruct it
Returns
stringImplementation of
Serializable::serialize()
unserialize()source public
unserialize( string $collection )
Unserializes the passed string and rebuilds the Collection instance
Parameters
- string
$collection
- The serialized collection
Implementation of
Serializable::unserialize()
Methods used from Cake\Collection\CollectionTrait
_unwrap()source public
_unwrap( )
append()source public
append( $items )
avg()source public
avg( $matcher null )
cartesianProduct()source public
cartesianProduct( callable $operation null , callable $filter null )
Returns
Cake\Collection\CollectionInterface
chunk()source public
chunk( $chunkSize )
chunkWithKeys()source public
chunkWithKeys( $chunkSize , $preserveKeys true )
combine()source public
combine( $keyPath , $valuePath , $groupPath null )
compile()source public
compile( $preserveKeys true )
contains()source public
contains( $value )
countBy()source public
countBy( $callback )
each()source public
each( callable $c )
every()source public
every( callable $c )
extract()source public
extract( $matcher )
first()source public
first( )
firstMatch()source public
firstMatch( array $conditions )
groupBy()source public
groupBy( $callback )
indexBy()source public
indexBy( $callback )
isEmpty()source public
isEmpty( )
jsonSerialize()source public
jsonSerialize( )
last()source public
last( )
listNested()source public
listNested( $dir 'desc' , $nestingKey 'children' )
Returns
Cake\Collection\Iterator\TreeIterator
match()source public
match( array $conditions )
max()source public
max( $callback , $type SORT_NUMERIC )
median()source public
median( $matcher null )
min()source public
min( $callback , $type SORT_NUMERIC )
nest()source public
nest( $idPath , $parentPath , $nestingKey 'children' )
optimizeUnwrap()source protected
optimizeUnwrap( )
Unwraps this iterator and returns the simplest traversable that can be used for getting the data out
Returns
Traversable|arrayreduce()source public
reduce( callable $c , $zero null )
sample()source public
sample( $size 10 )
shuffle()source public
shuffle( )
skip()source public
skip( $howMany )
some()source public
some( callable $c )
sortBy()source public
sortBy( $callback , $dir SORT_DESC , $type SORT_NUMERIC )
sumOf()source public
sumOf( $matcher null )
take()source public
take( $size 1 , $from 0 )
through()source public
through( callable $handler )
toArray()source public
toArray( $preserveKeys true )
toList()source public
toList( )
unfold()source public
unfold( callable $transformer null )
unwrap()source public
unwrap( )
zip()source public
zip( $items )
zipWith()source public
zipWith( $items , $callable )
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https://api.cakephp.org/3.4/class-Cake.Collection.Collection.html