array_pop() with key-value pair ???

[Eli]

Hi,

Why isn't there a function that acts like array_pop() returns a pair of
key-value rather than the value only ?

Reason is, that in order to pop the key-value pair, you do:
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>

I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array. While array_pop() can be acceleraed by
the guts of PHP engine.

-thanks

[Eli]

More over.. PHP seems to be quiet slow when dealing with array_shift()
array_unshift(), but it is much faster with array_pop() array_push(). I
am not familiar with the PHP internals, but why not add a pointer to the
start and end of the array?

Good word can be said on PHP that accelerated at least count() function..

Maybe I require too much.. PHP is a rapid development scripting
language.. not a massive optimized programming language.. :-/

Post by Eli
Hi,
Why isn't there a function that acts like array_pop() returns a pair of
key-value rather than the value only ?
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>
I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array. While array_pop() can be acceleraed by
the guts of PHP engine.
-thanks

[Mikey]

I guess you have tried foreach?

foreach ($array as $key => $value) {
...
}

Mikey

Post by Eli
More over.. PHP seems to be quiet slow when dealing with array_shift()
array_unshift(), but it is much faster with array_pop() array_push(). I
am not familiar with the PHP internals, but why not add a pointer to the
start and end of the array?
Good word can be said on PHP that accelerated at least count() function..
Maybe I require too much.. PHP is a rapid development scripting
language.. not a massive optimized programming language.. :-/

Post by Eli
Hi,
Why isn't there a function that acts like array_pop() returns a pair
of key-value rather than the value only ?
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>
I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array. While array_pop() can be acceleraed
by the guts of PHP engine.
-thanks

[Eli]

Post by Mikey
I guess you have tried foreach?
foreach ($array as $key => $value) {
...
}

No.. loop should not be necessary when you want to take only the first
or the last element in the array.
Better using array_pop() array_shift() reset() end() and each()
functions for better run times.

[Robin Vickery]

Post by Eli
Hi,
Why isn't there a function that acts like array_pop() returns a pair of
key-value rather than the value only ?
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>
I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array.

benchmark this:

end($arr);
list($key, $value) = each($arr);

-robin

[Németh Zoltán]

Post by Robin Vickery

Post by Eli
Hi,
Why isn't there a function that acts like array_pop() returns a pair of
key-value rather than the value only ?
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>
I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array.

end($arr);
list($key, $value) = each($arr);

array_pop also removes the element from the array so add one more line:
unset($arr[$key]);

greets
Zoltán Németh

Post by Robin Vickery
-robin

[Robin Vickery]

Post by Németh Zoltán

Post by Robin Vickery

Post by Eli
Hi,
Why isn't there a function that acts like array_pop() returns a pair of
key-value rather than the value only ?
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>
I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array.

end($arr);
list($key, $value) = each($arr);

unset($arr[$key]);

Yeah, but he's not actually popping the last element of $arr, he's
just using it to get the last key from $arr_keys.

-robin

[Németh Zoltán]

Post by Robin Vickery

Post by Németh Zoltán

Post by Robin Vickery

Post by Eli
Hi,
Why isn't there a function that acts like array_pop() returns a pair of
key-value rather than the value only ?
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>
I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array.

end($arr);
list($key, $value) = each($arr);

unset($arr[$key]);

Yeah, but he's not actually popping the last element of $arr, he's
just using it to get the last key from $arr_keys.

well, sorry, I didn't examine his code just read his original question
saying "a function that acts like array_pop()"

it's now up to him to decide whether he wants to unset that element or
not :)

greets
Zoltán Németh

Post by Robin Vickery
-robin

[Eli]

Post by Robin Vickery

Post by Eli
Hi,
Why isn't there a function that acts like array_pop() returns a pair of
key-value rather than the value only ?
<?php
$arr = array('a'=>1,'b'=>2,'c'=>3,'d'=>4);
$arr_keys = array_keys($arr);
$key = array_pop($arr_keys);
$value = $arr[$key];
?>
I benchmarked array_keys() function and it is very slow on big arrays
since PHP has to build the array.

end($arr);
list($key, $value) = each($arr);

Thanks! that benchmarks with normal speed.. :-)