QuickHashStringIntHash::delete

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QuickHashStringIntHash::delete — This method deletes an entry from the hash

説明

public function QuickHashStringIntHash::delete(string $key): bool

This method deletes an entry from the hash, and returns whether the entry was deleted or not. Associated memory structures will not be freed immediately, but rather when the hash itself is freed.

Elements can not be deleted when the hash is used in an iterator. The method will not throw an exception, but simply return false like would happen with any other deletion failure.

パラメータ

key: The key of the entry to delete.

戻り値

true when the entry was deleted, and false if the entry was not deleted.

例

例1 QuickHashStringIntHash::delete() example

<?php
$hash = new QuickHashStringIntHash( 1024 );
var_dump( $hash->exists( 'four' ) );
var_dump( $hash->add( 'four', 5 ) );
var_dump( $hash->get( 'four' ) );
var_dump( $hash->delete( 'four' ) );
var_dump( $hash->exists( 'four' ) );
var_dump( $hash->get( 'four' ) );
var_dump( $hash->delete( 'four' ) );
?>

上の例の出力は、たとえば以下のようになります。

bool(false)
bool(true)
int(5)
bool(true)
bool(false)
bool(false)
bool(false)

関連キーワード:

hash entry QuickHashStringIntHash delete dump four method deletes deleted exists freed construct information available whether Associated memory structures immediately rather itself Elements used iterator throw