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what does mean this? [message #175333] Tue, 06 September 2011 16:37 Go to next message
rataplanbumbum is currently offline  rataplanbumbum
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In a script I have a statement:

$cartID = $cart->cartID = $cart->generate_cart_id();


can someone explain what does this mean?

Thanks!
Re: what does mean this? [message #175334 is a reply to message #175333] Tue, 06 September 2011 16:54 Go to previous messageGo to next message
Jerry Stuckle is currently offline  Jerry Stuckle
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On 9/6/2011 4:37 PM, rataplanbumbum wrote:
> In a script I have a statement:
>
> $cartID = $cart->cartID = $cart->generate_cart_id();
>
>
> can someone explain what does this mean?
>
> Thanks!

It calls the function generate_cart_id() in the object $cart.

It takes the results of that function and places it in the cardID member
of the object $cart.

It then takes the result and places it in the variable $cartID.

It is equivalent to:

$cart->cartID = $cart->generate_cart_id();
$cartID = $cart->cartID;
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Re: what does mean this? [message #175335 is a reply to message #175333] Tue, 06 September 2011 16:59 Go to previous messageGo to next message
Michael Fesser is currently offline  Michael Fesser
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.oO(rataplanbumbum)

> In a script I have a statement:
>
> $cartID = $cart->cartID = $cart->generate_cart_id();
>
>
> can someone explain what does this mean?

$cart is an object. Its method generate_cart_id() returns some value,
which is assigned to both the variable $cartID and the object property
$cart->cartID.

A more complex way to code this would be:

$result = $cart->generate_cart_id();
$cart->cartID = $result;
$cartID = $result;

What's ugly about this is that the same value is stored in an object
property and in a variable. Without knowing the context this doesn't
look good.

Micha

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Re: what does mean this? [message #175339 is a reply to message #175335] Wed, 07 September 2011 08:07 Go to previous messageGo to next message
rataplanbumbum is currently offline  rataplanbumbum
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Il 06/09/2011 22:59, Michael Fesser ha scritto:
> .oO(rataplanbumbum)
>
>> In a script I have a statement:
>>
>> $cartID = $cart->cartID = $cart->generate_cart_id();
>>
>>
>> can someone explain what does this mean?
>
> $cart is an object. Its method generate_cart_id() returns some value,
> which is assigned to both the variable $cartID and the object property
> $cart->cartID.
>
> A more complex way to code this would be:
>
> $result = $cart->generate_cart_id();
> $cart->cartID = $result;
> $cartID = $result;
>
> What's ugly about this is that the same value is stored in an object
> property and in a variable. Without knowing the context this doesn't
> look good.
>
> Micha
>

tnks
Re: what does mean this? [message #175340 is a reply to message #175339] Wed, 07 September 2011 10:37 Go to previous message
sheldonlg is currently offline  sheldonlg
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On 9/7/2011 8:07 AM, rataplanbumbum wrote:
> Il 06/09/2011 22:59, Michael Fesser ha scritto:
>> .oO(rataplanbumbum)
>>
>>> In a script I have a statement:
>>>
>>> $cartID = $cart->cartID = $cart->generate_cart_id();
>>>
>>>
>>> can someone explain what does this mean?
>>
>> $cart is an object. Its method generate_cart_id() returns some value,
>> which is assigned to both the variable $cartID and the object property
>> $cart->cartID.
>>
>> A more complex way to code this would be:
>>
>> $result = $cart->generate_cart_id();
>> $cart->cartID = $result;
>> $cartID = $result;
>>
>> What's ugly about this is that the same value is stored in an object
>> property and in a variable. Without knowing the context this doesn't
>> look good.
>>
>> Micha
>>
>
> tnks

I would write this code as:

$cart->generate_cart_id();
$cartID = $cart->getCartId();

(where generate_cart_id() would also store a private class variable,
$cardID, as part of the generation)


--
Shelly
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