array_seek function

hi Felix,

Not sure about the usefulness of this function but the name is
misleading (pls reattach the patch as .txt while being at it :). Does
it set the position (_seek) or does it return the value of a given
position (_get_pos)? or both (no idea :)?

Cheers,

Cheers,

On Tue, Mar 16, 2010 at 2:30 PM, Felix De Vliegher
felix.devliegher@gmail.com wrote:

Hi all

I recently needed seek functionality in arrays, and couldn't find it in the regular set of array functions, so I wrote a function for it. (Seek = getting an array value based on the position (or offset, if you want to call it like that), and not the key of the item)

Basically you can use it like this:
$input = array(3, 'bar', 'baz');
echo array_seek($input, 2); // returns 'baz'
echo array_seek($input, 0); // returns 3
echo array_seek($input, 5); // returns NULL, emits an out of range warning

I was wondering if it's useful to add this to the family of array functions. I know there is a somewhat similar thing in SPL (ArrayIterator::seek), but that doesn't work exactly like what I was aiming for.

Attached is a patch for the function against the 5.3 branch. If approved, I could add it to svn + testcases + docs. Feedback please :-)

Kind regards,
Felix

--

--
Pierre

@pierrejoye | http://blog.thepimp.net | http://www.libgd.org

Hi all

I recently needed seek functionality in arrays, and couldn't find it in the regular set of array functions, so I wrote a function for it. (Seek = getting an array value based on the position (or offset, if you want to call it like that), and not the key of the item)

Basically you can use it like this:
$input = array(3, 'bar', 'baz');
echo array_seek($input, 2); // returns 'baz'
echo array_seek($input, 0); // returns 3
echo array_seek($input, 5); // returns NULL, emits an out of range warning

I was wondering if it's useful to add this to the family of array functions. I know there is a somewhat similar thing in SPL (ArrayIterator::seek), but that doesn't work exactly like what I was aiming for.

Attached is a patch for the function against the 5.3 branch. If approved, I could add it to svn + testcases + docs. Feedback please :-)

Kind regards,
Felix

--

Maybe not as efficient as it could be but ...

<?php
$input = array('One' => 'Itchy', 'Two' => 'Knee', 'Three' => 'San',
'Four' => 'She');

echo @reset(array_keys(array_values($input), 'Knee'));

Richard.

Richard Quadling
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Felix De Vliegher wrote:

Hi all

I recently needed seek functionality in arrays, and couldn't find it
in the regular set of array functions, so I wrote a function for it.
Seek = getting an array value based on the position (or offset, if you
want to call it like that), and not the key of the item)

Basically you can use it like this:
$input = array(3, 'bar', 'baz');
echo array_seek($input, 2); // returns 'baz'
echo array_seek($input, 0); // returns 3
echo array_seek($input, 5); // returns NULL, emits an out of range warning

I thinks the user space implementation

function array_seek($array, $pos)
{
$a = array_values($array);
return $a[$pos];
}

is simple enough to not add a native function for this.

It might not be the most efficient way to do it but I doubt that it is
something done frequently enough to justify another native function.

My 2 cents,

• Chris

-----Original Message-----
From: Felix De Vliegher [mailto:felix.devliegher@gmail.com]
Sent: 16 March 2010 13:31
To: PHP internals
Subject: [PHP-DEV] array_seek function

Hi all

I recently needed seek functionality in arrays, and couldn't
find it in the regular set of array functions, so I wrote a
function for it. (Seek = getting an array value based on the
position (or offset, if you want to call it like that), and
not the key of the item)

Basically you can use it like this:
$input = array(3, 'bar', 'baz');
echo array_seek($input, 2); // returns 'baz'
echo array_seek($input, 0); // returns 3 echo
array_seek($input, 5); // returns NULL, emits an out of range
warning

Remember doing something like this in the past...

$input = array(3, 'bar', 'baz');
$iterator = new ArrayIterator($input);

$iterator->seek(2);
echo $iterator->current();

$iterator->seek(0);
echo $iterator->current();

$iterator->seek(5); // throws OutOfBoundsException

Though a specific function does make sense, imo.

Jared

Hi:

$input = array(3, 'bar', 'baz');
echo array_seek($input, 2); // returns 'baz'
echo array_seek($input, 0); // returns 3
echo array_seek($input, 5); // returns NULL, emits an out of range warning

Why waste time calling a function when this can be done right now by
acting on the array itself?

$input = array(3, 'bar', 'baz');
echo $input[2]; // returns 'baz'
echo $input[0]; // returns 3
echo $input[5]; // returns NULL, Notice: Undefined offset: 5

--Dan

--
T H E A N A L Y S I S A N D S O L U T I O N S C O M P A N Y
data intensive web and database programming
http://www.AnalysisAndSolutions.com/
4015 7th Ave #4, Brooklyn NY 11232 v: 718-854-0335 f: 718-854-0409

2010/3/16 Felix De Vliegher felix.devliegher@gmail.com:

Hi all

I recently needed seek functionality in arrays, and couldn't find it in the regular set of array functions, so I wrote a function for it. (Seek = getting an array value based on the position (or offset, if you want to call it like that), and not the key of the item)

Basically you can use it like this:
$input = array(3, 'bar', 'baz');
echo array_seek($input, 2); // returns 'baz'
echo array_seek($input, 0); // returns 3
echo array_seek($input, 5); // returns NULL, emits an out of range warning

I was wondering if it's useful to add this to the family of array functions. I know there is a somewhat similar thing in SPL (ArrayIterator::seek), but that doesn't work exactly like what I was aiming for.

Attached is a patch for the function against the 5.3 branch. If approved, I could add it to svn + testcases + docs. Feedback please :-)

Kind regards,
Felix

Hi Felix,

What about adding a new int parameter to PHP array function: next()
and prev() instead of adding a new one?

Cheers,
Patrick

2010/3/16 Felix De Vliegher felix.devliegher@gmail.com:

Hi all

I recently needed seek functionality in arrays, and couldn't find it in the regular set of array functions, so I wrote a function for it. (Seek = getting an array value based on the position (or offset, if you want to call it like that), and not the key of the item)

Basically you can use it like this:
$input = array(3, 'bar', 'baz');
echo array_seek($input, 2); // returns 'baz'
echo array_seek($input, 0); // returns 3
echo array_seek($input, 5); // returns NULL, emits an out of range warning

I was wondering if it's useful to add this to the family of array functions. I know there is a somewhat similar thing in SPL (ArrayIterator::seek), but that doesn't work exactly like what I was aiming for.

Attached is a patch for the function against the 5.3 branch. If approved, I could add it to svn + testcases + docs. Feedback please :-)

Kind regards,
Felix

Hello Felix !

Why not use arrayIterator::seek() ?

Best regards,
Fred