Re: [PHP] check if any element of an array is not empty

[Robin Vickery]

2008/4/30 Nathan Nobbe [EMAIL PROTECTED]:
 On Wed, Apr 30, 2008 at 2:58 PM, Richard Heyes [EMAIL PROTECTED] wrote:

   but I was thinking if there is the function does that.
  
  
   array_filter(). Note this:
  
   If no callback is supplied, all entries of input equal to FALSE (see
   converting to boolean) will be removed.
  
   http://uk3.php.net/manual/en/function.array-filter.php


  i dont really see how that gets him the answer without at least checking the
  number of elements in the array after filtering it w/ array_filter;

Because an empty array evaluates to false when cast to bool (which is
implicit in a conditional).

So this should work fine:

if (array_filter($myArray)) {
  // only do this if there's stuff worth bothering with in myArray
}

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Re: [PHP] check if any element of an array is not empty

[Richard Heyes]

i dont really see how that gets him the answer without at least checking the
number of elements in the array after filtering it w/ array_filter; which if
he wanted to reuse in several places would make sense to write a simple
function for anyway..


Yes, on both counts.

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Richard Heyes

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Re: [PHP] check if any element of an array is not empty

[tedd]

At 3:36 PM -0500 4/30/08, afan pasalic wrote:

hi,
as a result of one calculation I'm receiving an array where elements
could be 0 or date (as string -mm-dd hh:ii:ss).
I have to check if any of elements of the array is date or if all
elements of the array is 0?

If I try array_sum($result) I'll get 0 no matter what (0 + $string = 0).

I know I can do something like:
foreach($result as $value)
{
if ($value !=0)
{
   $alert = true;
}
}

or

if (in_array($result, '-'))
{
$alert = true;
}


but I was thinking if there is the function does that.

thanks for any help.

-afan



You can create an empty array and check to see if the difference via 
array_diff.


Cheers,

tedd
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[PHP] check if any element of an array is not empty

[afan pasalic]

hi,
as a result of one calculation I'm receiving an array where elements
could be 0 or date (as string -mm-dd hh:ii:ss).
I have to check if any of elements of the array is date or if all
elements of the array is 0?

If I try array_sum($result) I'll get 0 no matter what (0 + $string = 0).

I know I can do something like:
foreach($result as $value)
{
if ($value !=0)
{
   $alert = true;
}
}

or

if (in_array($result, '-'))
{
$alert = true;
}


but I was thinking if there is the function does that.

thanks for any help.

-afan

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Re: [PHP] check if any element of an array is not empty

[Nathan Nobbe]

On Wed, Apr 30, 2008 at 2:36 PM, afan pasalic [EMAIL PROTECTED] wrote:

 hi,
 as a result of one calculation I'm receiving an array where elements
 could be 0 or date (as string -mm-dd hh:ii:ss).
 I have to check if any of elements of the array is date or if all
 elements of the array is 0?

 If I try array_sum($result) I'll get 0 no matter what (0 + $string = 0).

 I know I can do something like:
 foreach($result as $value)
 {
if ($value !=0)
{
   $alert = true;
}
 }

 or

 if (in_array($result, '-'))
 {
$alert = true;
 }


 but I was thinking if there is the function does that.


i don think theres a function for that; and to be performance conscience, if
just one occurrence of a date is all you need to know its not all 0's then
break out of the loop once youve found that.

foreach($result as $value)
{
   if ($value !== 0)
   {
  $alert = true;
  break;
   }
}

-nathan

Re: [PHP] check if any element of an array is not empty

[Richard Heyes]

but I was thinking if there is the function does that.


array_filter(). Note this:

If no callback is supplied, all entries of input equal to FALSE (see 
converting to boolean) will be removed.


http://uk3.php.net/manual/en/function.array-filter.php

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Richard Heyes

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Re: [PHP] check if any element of an array is not empty

[afan pasalic]

yup! that's the one
:D

thanks richard



Richard Heyes wrote:
 but I was thinking if there is the function does that.

 array_filter(). Note this:

 If no callback is supplied, all entries of input equal to FALSE (see
 converting to boolean) will be removed.

 http://uk3.php.net/manual/en/function.array-filter.php


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Re: [PHP] check if any element of an array is not empty

[Nathan Nobbe]

On Wed, Apr 30, 2008 at 2:58 PM, Richard Heyes [EMAIL PROTECTED] wrote:

 but I was thinking if there is the function does that.


 array_filter(). Note this:

 If no callback is supplied, all entries of input equal to FALSE (see
 converting to boolean) will be removed.

 http://uk3.php.net/manual/en/function.array-filter.php


i dont really see how that gets him the answer without at least checking the
number of elements in the array after filtering it w/ array_filter; which if
he wanted to reuse in several places would make sense to write a simple
function for anyway..

function isSomethingInArray($array) {
if(count(array_filter($array))  0) { return true; } else { return
false; }
}

-nathan