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@NogDogNov 29.2010 — #The function being used with array walk needs to accept two parameters (array key/index and the associated value). So the basic syntax for the create_function() part would be something like:
(In cases where you want to directly modify the array value, pass it by reference with the "&" operator.)
Now, whether array_walk is the way to go for what you are trying to do, I'm not sure, as I don't think I'm following exactly what you want to accomplish.@NogDogNov 30.2010 — #The best I can think of to do within your restrictions (and why array_keys() will be much better ? ):
lambda create function
curious as to how to create a quick lambda function
to take the keys of an already defined array and creating
a new array from them.
[code=php]
$type = ‘CHILD’;
$walk = array();
array_walk(create_function($data, ‘return “foreach ($data[$type] AS $k) $walk[$k endforeach;”‘));
print_r($walk);
just trying to understand create_function and lambda, failing miserably at both i guess
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@NogDogNov 29.2010 — #The function being used with array walk needs to accept two parameters (array key/index and the associated value). So the basic syntax for the create_function() part would be something like:[code=php]
// use single quotes!
create_function('$key, $val', 'do_stuff_with($key) or do_stuff_with($val);')
[/code](In cases where you want to directly modify the array value, pass it by reference with the "&" operator.)
Now, whether array_walk is the way to go for what you are trying to do, I'm not sure, as I don't think I'm following exactly what you want to accomplish.
0
@NogDogNov 30.2010 — #The best I can think of to do within your restrictions (and why array_keys() will be much better ? ):[code=php]
<?php
$array = range('a', 'd');
$keys = $array;
array_walk(
$keys,
create_function(
'&$value, $key',
'$value = $key;'
)
);
echo "<pre>".print_r($array,1)."</pre>";
echo "<pre>".print_r($keys,1)."</pre>";
[/code]