list to array with defined keys

[Anguz]

if I have this

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$list = "
   k1, v1\n
   k2, v2\n
   k3, v3";

I know that exploding it I can save each line in an array, but how can I use the first value in each line as the key? like this

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'k1' => "v1",
'k2' => "v2",
'k3' => "v3"

[Parham]

rough thinking of what i came up with, but it keeps adding an empty first element.. i have no idea where it's coming from:

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<?php

$list = "
   k1, v1\n
   k2, v2\n
   k3, v3";

foreach (explode("\n", $list) as $element) {
  $element = trim($element);
  list($key,$value) = explode(",", $element);
  if (!isset($array)) {
    $array = array($key => $value);
  } else {
    $array += array($key => $value);
  }
}

//testing
foreach ($array as $a => $b) {
print "$a - $b\n";
}

?>


[chris]

rough thinking of what i came up with, but it keeps adding an empty first element.. i have no idea where it's coming from

quite simple

replace

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$list = "
   k1, v1\n
   k2, v2\n
   k3, v3";

with

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$list = "k1, v1\n
   k2, v2\n
   k3, v3";

and it doesn't happen

[Anguz]

aaaa I see... exploding the exploded does the trick

why did you write this line like this?

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$array += array($key => $value);

the "+=" adds to the existing array instead of overwritting it?

[Parham]

rough thinking of what i came up with, but it keeps adding an empty first element.. i have no idea where it's coming from

quite simple

replace

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$list = "
   k1, v1\n
   k2, v2\n
   k3, v3";

with

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$list = "k1, v1\n
   k2, v2\n
   k3, v3";

and it doesn't happen

I'm a complete idiot, TOTALLY didn't see that first newline...

* Parham walks away with a moronic feel

[Parham]

aaaa I see... exploding the exploded does the trick

why did you write this line like this?

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$array += array($key => $value);

the "+=" adds to the existing array instead of overwritting it?

It's a bit of a stretch from how the += operator actually works (or how it's actually supposed to be used), but yeah, it adds a new array element to the existing array.

[Anguz]

It's a bit of a stretch from how the += operator actually works (or how it's actually supposed to be used), but yeah, it adds a new array element to the existing array.

I see, that looks like a neat way of doing it... other ways are there to add an array element to an array?

about the code you gave me, could it also be written like this?

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foreach (explode("\n", $list) as $element)
{
   list($key, $value) = explode(",", trim($element));
   $array = (!isset($array) && $key !== '' && $value !== '' ? array($key => $value) : $array += array($key => $value));
}

does it make a difference in how fast it's parsed to write it in less lines? just wondering...

I also added

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&& $key !== '' && $value !== ''

to the condition to avoid empty array elements, but there may be a better way to do it...

[Parham]

speed doesn't really depend on the number of lines really... it still has to go through the same kind of checks and processes.

[Anguz]

speed doesn't really depend on the number of lines really... it still has to go through the same kind of checks and processes.

I understand

about the code I wrote above, the check to not have empty array elements was wrong, it should be more like this

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foreach (explode("\n", $list) as $element)
{
   list($key, $value) = explode(",", trim($element));
   if ($key !== '' && $value !== '')
      $array = (!isset($array) ? array($key => $value) : $array += array($key => $value));
}

I think...