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Removing specific array items

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  Removing specific array items Scott Johnson <noonehome@chalupasworld.com> - 2012-05-03 06:25 -0700
    Re: Removing specific array items Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-03 10:55 -0400
      Re: Removing specific array items Scott Johnson <noonehome@chalupasworld.com> - 2012-05-03 16:32 -0700
    Re: Removing specific array items "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-05-03 17:20 +0200
    Re: Removing specific array items Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-05-03 18:05 +0200

#5808 — Removing specific array items

In a simple quote cart I track items in a session.

$_SESSION['quote'][##] = {data}

Which increments the ## for each added item.

At the time when the client wants to remove an item from the cart I just 
clear the {data} from $_SESSION['quote'][item_id] = '';

The issue i run into is when I want to display the cart, i just cant 
step thru the array without seeing if a particular item is '', which 
works but would like to find a more 'elegant' way.

With all that said, is there a way to remove the item from the array 
rather then clear the items data.

I can only think to
1. 'somehow' move or rotate the item to the end of the array and POP it off
2. or even go as far as step thru the array and create a new one with 
only populated data items.

I have looked thru the 50+ different array functions and can't seem to 
find the right tool.  Maybe a combination I am not seeing.

Thanks
Scotty

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#5809

On 5/3/2012 9:25 AM, Scott Johnson wrote:
> In a simple quote cart I track items in a session.
>
> $_SESSION['quote'][##] = {data}
>
> Which increments the ## for each added item.
>
> At the time when the client wants to remove an item from the cart I just
> clear the {data} from $_SESSION['quote'][item_id] = '';
>
> The issue i run into is when I want to display the cart, i just cant
> step thru the array without seeing if a particular item is '', which
> works but would like to find a more 'elegant' way.
>
> With all that said, is there a way to remove the item from the array
> rather then clear the items data.
>
> I can only think to
> 1. 'somehow' move or rotate the item to the end of the array and POP it off
> 2. or even go as far as step thru the array and create a new one with
> only populated data items.
>
> I have looked thru the 50+ different array functions and can't seem to
> find the right tool. Maybe a combination I am not seeing.
>
> Thanks
> Scotty

unset().

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

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#5814

On 5/3/2012 7:55 AM, Jerry Stuckle wrote:
> On 5/3/2012 9:25 AM, Scott Johnson wrote:
>> In a simple quote cart I track items in a session.
>>
>> $_SESSION['quote'][##] = {data}
>>
>> Which increments the ## for each added item.
>>
>> At the time when the client wants to remove an item from the cart I just
>> clear the {data} from $_SESSION['quote'][item_id] = '';
>>
>> The issue i run into is when I want to display the cart, i just cant
>> step thru the array without seeing if a particular item is '', which
>> works but would like to find a more 'elegant' way.
>>
>> With all that said, is there a way to remove the item from the array
>> rather then clear the items data.
>>
>> I can only think to
>> 1. 'somehow' move or rotate the item to the end of the array and POP
>> it off
>> 2. or even go as far as step thru the array and create a new one with
>> only populated data items.
>>
>> I have looked thru the 50+ different array functions and can't seem to
>> find the right tool. Maybe a combination I am not seeing.
>>
>> Thanks
>> Scotty
>
> unset().
>

Thanks all for the replies.

unset() it is.

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#5810

Am 03.05.2012 15:25, schrieb Scott Johnson:
> In a simple quote cart I track items in a session.
> 
> $_SESSION['quote'][##] = {data}
> 
> Which increments the ## for each added item.
> 
> At the time when the client wants to remove an item from the cart I just clear the
> {data} from $_SESSION['quote'][item_id] = '';
> 
> The issue i run into is when I want to display the cart, i just cant step thru the
> array without seeing if a particular item is '', which works but would like to find a
> more 'elegant' way.
> 
> With all that said, is there a way to remove the item from the array rather then
> clear the items data.

unset($_SESSION['quote'][item_id]);

/Str.

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#5811

Scott Johnson wrote:

> In a simple quote cart I track items in a session.
> 
> $_SESSION['quote'][##] = {data}
> 
> Which increments the ## for each added item.

ISTM you are looking for

  $_SESSION['quote'][] = $data;

instead, which automatically increments the index of the item in 
$_SESSION['quote'].  On the other hand, if the real code was

  $_SESSION['quote'][$index] = $items[$index];

you might want to consider simplifying the loop to one statement:

  $_SESSION['quote'] = $items;

> At the time when the client wants to remove an item from the cart I just
> clear the {data} from $_SESSION['quote'][item_id] = '';

Consider

  unset($_SESSION['quote'][$item_id]);

instead.
 
> The issue i run into is when I want to display the cart, i just cant
> step thru the array without seeing if a particular item is '',

(Please try to work on your spelling.)

> which works but would like to find a more 'elegant' way.

After the above, you might want to use

  if (!isset($_SESSION['quote'][$item_id])
  {
    /* Item with $item_id exists */
  }

This approach is more precise in combination with is_null().

> With all that said, is there a way to remove the item from the array
> rather then clear the items data.
                                  ^
That is _not_ a question.

> I have looked thru the 50+ different array functions and can't seem to
> find the right tool.  Maybe a combination I am not seeing.

There is:

<http://php.net/unset>
<http://php.net/isset>
<http://php.net/is_null>


PointedEars
-- 
    realism:    HTML 4.01 Strict
    evangelism: XHTML 1.0 Strict
    madness:    XHTML 1.1 as application/xhtml+xml
                                                    -- Bjoern Hoehrmann

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