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AppendIterator クラス

(PHP 5 >= 5.1.0, PHP 7)

導入

複数のイテレータをひとつひとつ処理するイテレータです。

クラス概要

AppendIterator extends IteratorIterator implements OuterIterator {

/* メソッド */

public __construct ( void )

public void append ( Iterator $iterator )

public mixed current ( void )

public ArrayIterator getArrayIterator ( void )

public Iterator getInnerIterator ( void )

public int getIteratorIndex ( void )

public scalar key ( void )

public void next ( void )

public void rewind ( void )

public bool valid ( void )

/* 継承したメソッド */

public IteratorIterator::__construct ( Traversable $iterator )

public mixed IteratorIterator::current ( void )

public Traversable IteratorIterator::getInnerIterator ( void )

public scalar IteratorIterator::key ( void )

public void IteratorIterator::next ( void )

public void IteratorIterator::rewind ( void )

public bool IteratorIterator::valid ( void )

}

AppendIterator::append — イテレータを追加する
AppendIterator::__construct — AppendIterator を作成する
AppendIterator::current — 現在の値を取得する
AppendIterator::getArrayIterator — ArrayIterator を取得する
AppendIterator::getInnerIterator — 内部イテレータを取得する
AppendIterator::getIteratorIndex — イテレータのインデックスを取得する
AppendIterator::key — 現在のキーを取得する
AppendIterator::next — 次の要素に移動する
AppendIterator::rewind — イテレータを巻き戻す
AppendIterator::valid — 現在の要素が有効かどうかを調べる

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User Contributed Notes 4 notes

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joshdifabio at gmail dot com ¶

1 year ago


Note that AppendIterator will segfault when iterating over an empty generator. Do not use AppendIterator in conjunction with generators.

https://3v4l.org/YC68k

https://bugs.php.net/bug.php?id=71436

down

komalbarun at gmail dot com ¶

3 months ago


Updated code.
 I could not find how to edit a note :/

Preventing segfault if empty generator.
<?php

$append_iterator = new \AppendIterator();

$generator = some_generator();

// Only works if first value in generator is not empty
// useful when yielding arrays
foreach ($generator as $value) 
{
    //If first $value not empty, generator is not empty.
    if(!empty($value))
    {
        $append_iterator->append($generator );
        //break out of loop after appending.
        break;
    }
}

down

komalbarun at gmail dot com ¶

3 months ago


Updated code.
 I could not find how to edit a note :/

Preventing segfault if empty generator.
<?php

$append_iterator = new \AppendIterator();

$generator = ReportModel::come_generator();

// Only works if first value in generator is not empty
// useful when yielding arrays
foreach ($append_iterator as $value) 
{
    //If first $value not empty, generator is not empty.
    if(!empty($value))
    {
        $append_iterator->append($errors);
        //break out of loop after appending.
    break;
    }
}

down

koambarun at evolution dot com ¶

3 months ago


$append_iterator = new \AppendIterator();

$generator = ReportModel::come_generator();

foreach ($errors as $value) 
{
    //If first $value not empty, generator is not empty.
    if(!empty($value))
    {
        $append_iterator->append($errors);
        //break out of loop after appending.
    break;
    }
}

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AppendIterator クラス

導入

クラス概要

目次

User Contributed Notes 4 notes