Re: [PHP] Re: unset empty elements in an array
On 13/07/2004, at 3:14 AM, Paul Bissex wrote:
How about array_filter()? From the docs: "If the callback function is
not supplied, array_filter() will remove all the entries of input
that are equal to FALSE."
$a = array ('a' => 'foo', 'b' => '', 'c' => null, 'd' => 99, 'e' =>
0);
print_r (array_filter ($a));
// Output:
Array
(
[a] => foo
[d] => 99
)
As a previous poster noted, though, this will only work for you if "0"
and the empty string et al. are not significant in your application.
Nice idea Paul, will try it out :)
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Re: [PHP] Re: unset empty elements in an array
"Curt Zirzow" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> * Thus wrote Justin French:
> > On 12/07/2004, at 6:38 PM, Thomas Seifert wrote:
> >
> > My view of internal functions is that they solve common, repetitive
> > problems. Sure, some of those problems are quite complex, but others
> > are not. A perfect example would be array_walk() -- it can be solved
> > in a "one liner" too:
> >
> > foreach ($in as $k => $v ) { $in[$k] = myFunction($v); }
> >
> > ... but someone decided it was useful as an internal function. My hope
> > was that there was such a function to delete empty array elements
> > already defined in PHP, but since it appears there isn't, I'll just
> > keep including my own from a library file.
>
> The problem with your function you want is that it is very
> specific, the name would have to be something like:
>
> unset_array_items_only_if_val_is_empty($array);
What about:
array_unset_empty_values() or array_remove_empty_values()
:-)
Torsten
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Re: [PHP] Re: unset empty elements in an array
* Thus wrote Justin French:
> On 12/07/2004, at 6:38 PM, Thomas Seifert wrote:
>
> My view of internal functions is that they solve common, repetitive
> problems. Sure, some of those problems are quite complex, but others
> are not. A perfect example would be array_walk() -- it can be solved
> in a "one liner" too:
>
> foreach ($in as $k => $v ) { $in[$k] = myFunction($v); }
>
> ... but someone decided it was useful as an internal function. My hope
> was that there was such a function to delete empty array elements
> already defined in PHP, but since it appears there isn't, I'll just
> keep including my own from a library file.
The problem with your function you want is that it is very
specific, the name would have to be something like:
unset_array_items_only_if_val_is_empty($array);
Curt
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Re: [PHP] Re: unset empty elements in an array
On Tue, 13 Jul 2004 01:57:48 +1000, Justin French
<[EMAIL PROTECTED]> wrote:
> [...] My hope
> was that there was such a function to delete empty array elements
> already defined in PHP, but since it appears there isn't, I'll just
> keep including my own from a library file.
How about array_filter()? From the docs: "If the callback function is
not supplied, array_filter() will remove all the entries of input
that are equal to FALSE."
$a = array ('a' => 'foo', 'b' => '', 'c' => null, 'd' => 99, 'e' => 0);
print_r (array_filter ($a));
// Output:
Array
(
[a] => foo
[d] => 99
)
As a previous poster noted, though, this will only work for you if "0"
and the empty string et al. are not significant in your application.
pb
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Re: [PHP] Re: unset empty elements in an array
On 12/07/2004, at 6:38 PM, Thomas Seifert wrote:
Really what do you need an internal function for something simple like
that?
It may be simple, but it's 60 characters I have to type over and over,
or a user defined function I have to include() from a library file (and
I have to ensure that library file is up to date on 30+ web
applications).
My view of internal functions is that they solve common, repetitive
problems. Sure, some of those problems are quite complex, but others
are not. A perfect example would be array_walk() -- it can be solved
in a "one liner" too:
foreach ($in as $k => $v ) { $in[$k] = myFunction($v); }
... but someone decided it was useful as an internal function. My hope
was that there was such a function to delete empty array elements
already defined in PHP, but since it appears there isn't, I'll just
keep including my own from a library file.
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[PHP] Re: unset empty elements in an array
Daniel Kullik wrote:
Justin French wrote:
Hi,
Looking for a one-liner to delete all empty elements in an array. I
know I can do it with a foreach loop, but I'm hoping that I've missed
an existing function in the manual which may already do this, or a
simple one-liner to replace the foreach.
$v) {
if(empty($v)) {
unset($in[$k]);
}
}
?>
---
Justin French
http://indent.com.au
Though it's not really a one-liner:
[code]
while ($key = array_search('', $in)) unset($in[$key]);
[/code]
For more infos on array_seach(): http://www.php.net/array_search
Daniel
A note I forgot to addi in my previous posting:
You ought to think over what you consider "empty" since empty() would
for example return true if the checked variable contained the integer 0
or the string '0'.
My posted line of code recognizes only an empty string as "empty".
You might want to take a look at this:
http://www.php.net/manual/en/types.comparisons.php
Daniel
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[PHP] Re: unset empty elements in an array
Justin French wrote:
Hi,
Looking for a one-liner to delete all empty elements in an array. I
know I can do it with a foreach loop, but I'm hoping that I've missed an
existing function in the manual which may already do this, or a simple
one-liner to replace the foreach.
$v) {
if(empty($v)) {
unset($in[$k]);
}
}
?>
---
Justin French
http://indent.com.au
Though it's not really a one-liner:
[code]
while ($key = array_search('', $in)) unset($in[$key]);
[/code]
For more infos on array_seach(): http://www.php.net/array_search
Daniel
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WWE e-commerce IT GmbH
Eiffestrasse 462, D-20537 Hamburg
Tel.: +49-40-2530659-0, Fax: +49-40-2530659-50
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[PHP] Re: unset empty elements in an array
On Mon, 12 Jul 2004 15:33:53 +1000, Justin French wrote:
> Hi,
>
> Looking for a one-liner to delete all empty elements in an array. I
> know I can do it with a foreach loop, but I'm hoping that I've missed
> an existing function in the manual which may already do this, or a
> simple one-liner to replace the foreach.
>
> foreach($in as $k => $v) {
> if(empty($v)) {
> unset($in[$k]);
> }
> }
> ?>
Sure, a one-liner:
foreach ($in as $k => $v ) { if(empty($v)) unset($in[$k]); }
;).
Really what do you need an internal function for something simple like
that?
thomas
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