Class FilterIterator

Creates a filtered iterator from another iterator. The filtering is done by passing a callback function to each of the elements and taking them out if it does not return true.

IteratorIterator implements Iterator, Traversable, OuterIterator

Cake\Collection\Collection implements Cake\Collection\CollectionInterface, Serializable uses Cake\Collection\CollectionTrait

Cake\Collection\Iterator\FilterIterator

Namespace: Cake\Collection\Iterator
Location: Collection/Iterator/FilterIterator.php

Properties summary

$_callback protected

callable

The callback used to filter the elements in this collection

Method Summary

__construct() public

Creates a filtered iterator using the callback to determine which items are accepted or rejected.
unwrap() public

Method Detail

__construct() public ¶

__construct( Traversable|array $items , callable $callback )

Creates a filtered iterator using the callback to determine which items are accepted or rejected.

Each time the callback is executed it will receive the value of the element in the current iteration, the key of the element and the passed $items iterator as arguments, in that order.

Parameters

Traversable|array $items: The items to be filtered.
callable $callback: Callback.

Throws

InvalidArgumentException
If passed incorrect type for items.

Overrides

Cake\Collection\Collection::__construct()

unwrap() public ¶

unwrap( )

We perform here some strictness analysis so that the iterator logic is bypassed entirely.

Returns

Iterator

Overrides

Cake\Collection\CollectionTrait::unwrap()

Methods inherited from Cake\Collection\Collection

__debugInfo() public ¶

__debugInfo( )

Returns an array that can be used to describe the internal state of this object.

Returns

array

count() public ¶

count( )

Returns the amount of elements in the collection.

Returns

integer

Implementation of

Cake\Collection\CollectionInterface::count()

countKeys() public ¶

countKeys( )

Returns the number of unique keys in this iterator. This is, the number of elements the collection will contain after calling toArray()

Returns

integer

Implementation of

Cake\Collection\CollectionInterface::countKeys()

serialize() public ¶

serialize( )

Returns a string representation of this object that can be used to reconstruct it

Returns

string

Implementation of

Serializable::serialize()

unserialize() 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() public ¶

_unwrap( )

append() public ¶

append( $items )

appendItem() public ¶

appendItem( $item , $key = null )

avg() public ¶

avg( $matcher = null )

buffered() public ¶

buffered( )

Returns

Cake\Collection\Iterator\BufferedIterator

cartesianProduct() public ¶

cartesianProduct( callable $operation = null , callable $filter = null )

Parameters

callable $operation optional null: Operation
callable $filter optional null: Filter

Returns

Cake\Collection\CollectionInterface

Throws

LogicException

chunk() public ¶

chunk( $chunkSize )

chunkWithKeys() public ¶

chunkWithKeys( $chunkSize , $preserveKeys = true )

combine() public ¶

combine( $keyPath , $valuePath , $groupPath = null )

compile() public ¶

compile( $preserveKeys = true )

contains() public ¶

contains( $value )

countBy() public ¶

countBy( $callback )

each() public ¶

each( callable $c )

every() public ¶

every( callable $c )

extract() public ¶

extract( $matcher )

filter() public ¶

filter( callable $c = null )

Returns

Cake\Collection\Iterator\FilterIterator

first() public ¶

first( )

firstMatch() public ¶

firstMatch( array $conditions )

groupBy() public ¶

groupBy( $callback )

indexBy() public ¶

indexBy( $callback )

insert() public ¶

insert( $path , $values )

Returns

Cake\Collection\Iterator\InsertIterator

isEmpty() public ¶

isEmpty( )

jsonSerialize() public ¶

jsonSerialize( )

last() public ¶

last( )

lazy() public ¶

lazy( )

listNested() public ¶

listNested( $dir = 'desc' , $nestingKey = 'children' )

Returns

Cake\Collection\Iterator\TreeIterator

map() public ¶

map( callable $c )

Returns

Cake\Collection\Iterator\ReplaceIterator

match() public ¶

match( array $conditions )

max() public ¶

max( $callback , $type = \SORT_NUMERIC )

median() public ¶

median( $matcher = null )

min() public ¶

min( $callback , $type = \SORT_NUMERIC )

nest() public ¶

nest( $idPath , $parentPath , $nestingKey = 'children' )

newCollection() protected ¶

newCollection( ... $args )

Returns a new collection.

Allows classes which use this trait to determine their own type of returned collection interface

Parameters

... $args: $args Constructor arguments.

Returns

Cake\Collection\CollectionInterface

optimizeUnwrap() protected ¶

optimizeUnwrap( )

Unwraps this iterator and returns the simplest traversable that can be used for getting the data out

Returns

Traversable|array

prepend() public ¶

prepend( $items )

prependItem() public ¶

prependItem( $item , $key = null )

reduce() public ¶

reduce( callable $c , $zero = null )

reject() public ¶

reject( callable $c )

Returns

Cake\Collection\Iterator\FilterIterator

sample() public ¶

sample( $size = 10 )

shuffle() public ¶

shuffle( )

skip() public ¶

skip( $howMany )

some() public ¶

some( callable $c )

sortBy() public ¶

sortBy( $callback , $dir = \SORT_DESC , $type = \SORT_NUMERIC )

stopWhen() public ¶

stopWhen( $condition )

Returns

Cake\Collection\Iterator\StoppableIterator

sumOf() public ¶

sumOf( $matcher = null )

take() public ¶

take( $size = 1 , $from = 0 )

takeLast() public ¶

takeLast( $howMany )

through() public ¶

through( callable $handler )

toArray() public ¶

toArray( $preserveKeys = true )

toList() public ¶

toList( )

transpose() public ¶

transpose( )

Returns

Cake\Collection\CollectionInterface

Throws

LogicException

unfold() public ¶

unfold( callable $transformer = null )

zip() public ¶

zip( $items )

zipWith() public ¶

zipWith( $items , $callable )

Magic methods inherited from Cake\Collection\CollectionInterface


				cartesianProduct()

Properties detail

`$_callback` ¶

protected callable

The callback used to filter the elements in this collection

Namespaces

Classes

Class FilterIterator

Properties summary

Method Summary

__construct() public

unwrap() public

Method Detail

__construct() public ¶

Parameters

Throws

Overrides

unwrap() public ¶

Returns

Overrides

Methods inherited from Cake\Collection\Collection

__debugInfo() public ¶

Returns

count() public ¶

Returns

Implementation of

countKeys() public ¶

Returns

Implementation of

serialize() public ¶

Returns

Implementation of

unserialize() public ¶

Parameters

Implementation of

Methods used from Cake\Collection\CollectionTrait

_unwrap() public ¶

append() public ¶

appendItem() public ¶

avg() public ¶

buffered() public ¶

Returns

cartesianProduct() public ¶

Parameters

Returns

Throws

chunk() public ¶

chunkWithKeys() public ¶

combine() public ¶

compile() public ¶

contains() public ¶

countBy() public ¶

each() public ¶

every() public ¶

extract() public ¶

filter() public ¶

Returns

first() public ¶

firstMatch() public ¶

groupBy() public ¶

indexBy() public ¶

insert() public ¶

Returns

isEmpty() public ¶

jsonSerialize() public ¶

last() public ¶

lazy() public ¶

listNested() public ¶

Returns

map() public ¶

Returns

match() public ¶

max() public ¶

median() public ¶

min() public ¶

nest() public ¶

newCollection() protected ¶

Parameters

Returns

optimizeUnwrap() protected ¶

Returns

prepend() public ¶

prependItem() public ¶

reduce() public ¶

reject() public ¶

`$_callback` ¶