setting values in associative array to 0

[R. Rajesh Jeba Anbiah]

Re: setting values in associative array to 0

Ewoud Dronkert wrote:[color=blue]
> On 6 Jun 2005 06:49:37 -0700, pauld wrote:[color=green]
> > help please ?[/color]
>
> Tested and working:
>
> $a = array( 'one' => 1, 'two' => 2, 'three' => 3 );
>
> // solution 1
> $b = $a;
> foreach ( $b as $k => $v ) $b[$k] = 0;[/color]
<snip>

IIRC, this is highly discouraged solution. Better use each().

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[Ewoud Dronkert]

Re: setting values in associative array to 0

On 8 Jun 2005 08:54:35 -0700, R. Rajesh Jeba Anbiah wrote:[color=blue][color=green]
>> foreach ( $b as $k => $v ) { ... }[/color]
>
> IIRC, this is highly discouraged solution. Better use each().[/color]

Per the manual, it is functionally identical to

reset( $b );
while ( list( $k, $v ) = each( $b ) ) { ... }

So certainly not "highly discouraged".


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[R. Rajesh Jeba Anbiah]

Re: setting values in associative array to 0

Ewoud Dronkert wrote:[color=blue]
> On 8 Jun 2005 08:54:35 -0700, R. Rajesh Jeba Anbiah wrote:[color=green][color=darkred]
> >> foreach ( $b as $k => $v ) { ... }[/color]
> >
> > IIRC, this is highly discouraged solution. Better use each().[/color]
>
> Per the manual, it is functionally identical to
>
> reset( $b );
> while ( list( $k, $v ) = each( $b ) ) { ... }
>
> So certainly not "highly discouraged".[/color]

IMHO, you're quoting the manual wrongly. When you have to modify the
array, foreach is highly discouraged because of it's behavior (as
explained in manual).

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[Chung Leong]

Re: setting values in associative array to 0

Inefficient? maybe. Highly discouraged? I don't think so.

Haven't benchmarked this, but array_walk() is probably the most
efficient way of modifying elements in an array, with the function
hopping from element to element using the internal linked list instead
of performing a hash lookup for each. Of course, the difference is
likely to be so small that it barely registers.