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OK thank you!
Steve
----- Original Message -----
From: "Tomasz Janeczko" <groups@xxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, May 25, 2007 12:18 PM
Subject: Re: [amibroker] Re: Nested Switch() statements
> Steve,
>
> No, I don't think it is worthwhile for speed reasons.
> In AFL speed of execution of switch statement vs if-else is almost
> identical.
> The only reason for using switch is that the code may look
> "cleaner".
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "Steve Dugas" <sjdugas@xxxxxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Friday, May 25, 2007 5:26 PM
> Subject: Re: [amibroker] Re: Nested Switch() statements
>
>
>> Hi Tomasz - Do you thnk it is worthwhile ( maybe speed increase, for
>> example? ) to convert existing if-else if-else if... over to Switch() ?
>> Thank you!
>>
>> Steve
>>
>> ----- Original Message -----
>> From: "Tomasz Janeczko" <groups@xxxxxxxxxxxxx>
>> To: <amibroker@xxxxxxxxxxxxxxx>
>> Sent: Friday, May 25, 2007 7:32 AM
>> Subject: Re: [amibroker] Re: Nested Switch() statements
>>
>>
>>> Hello,
>>>
>>> Frankly speaking fall-through is one of BEST features of switch()
>>> statement.
>>> I use it thousands of times. Implementations lacking that are missing
>>> single most important thing in switch() statement.
>>>
>>> K&R "The C Programming Language" book is really recommended reading.
>>>
>>> Best regards,
>>> Tomasz Janeczko
>>> amibroker.com
>>> ----- Original Message -----
>>> From: "Nigel Rowe" <rho@xxxxxxxxxxxxxxx>
>>> To: <amibroker@xxxxxxxxxxxxxxx>
>>> Sent: Friday, May 25, 2007 12:12 PM
>>> Subject: Re: [amibroker] Re: Nested Switch() statements
>>>
>>>
>>>> On Fri, 25 May 2007, Ton Sieverding wrote:
>>>>> Can you please explain me why 'switch statements are a frequent
>>>>> source of bugs' ? If the last CASE is a DEFAULT then all possible
>>>>> cases are covered. Or am I missing something in the AFL SWITCH
>>>>> statement ?
>>>>>
>>>>> switch ( expression )
>>>>> {
>>>>> case constant-expression1 : statement;
>>>>> case constant-expression2 : statement;
>>>>> ...
>>>>> case constant-expressionN : statement;
>>>>>
>>>>> default : statement;
>>>>>
>>>>> }
>>>>>
>>>>>
>>>>> Ton.
>>>>
>>>> The 'standard' error when using a switch statement in 'C' and
>>>> presumably
>>>> AFL, is forgetting to put 'break;' statements in.
>>>>
>>>> To paraphrase your example (above) so it looks like this:-
>>>>
>>>> switch ( expression )
>>>> {
>>>> case constant-expression1 : statement1;
>>>> case constant-expression2 : statement2;
>>>> ...
>>>> case constant-expressionN : statementN;
>>>> default : statement_default;
>>>> }
>>>>
>>>> If you leave out the break statements, and
>>>> expression==constant_expression1 you will execute statement1 (what you
>>>> wanted) AND ALSO statement2 AND ALSO statement3 AND ALSO ... statementN
>>>> AND ALSO statement_default.
>>>>
>>>> It's sometimes called the 'fall-through' bug. It's easy to miss, can
>>>> be
>>>> a right pain!
>>>>
>>>>
>>>> --
>>>> Nigel Rowe
>>>> rho \N{COMMERCIAL AT} swiftdsl \N{FULL STOP} com \N{FULL STOP} au
>>>>
>>>>
>>>>
>>>> Please note that this group is for discussion between users only.
>>>>
>>>> To get support from AmiBroker please send an e-mail directly to
>>>> SUPPORT {at} amibroker.com
>>>>
>>>> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
>>>> http://www.amibroker.com/devlog/
>>>>
>>>> For other support material please check also:
>>>> http://www.amibroker.com/support.html
>>>>
>>>> Yahoo! Groups Links
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>> Please note that this group is for discussion between users only.
>>>
>>> To get support from AmiBroker please send an e-mail directly to
>>> SUPPORT {at} amibroker.com
>>>
>>> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
>>> http://www.amibroker.com/devlog/
>>>
>>> For other support material please check also:
>>> http://www.amibroker.com/support.html
>>>
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>> Please note that this group is for discussion between users only.
>>
>> To get support from AmiBroker please send an e-mail directly to
>> SUPPORT {at} amibroker.com
>>
>> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
>> http://www.amibroker.com/devlog/
>>
>> For other support material please check also:
>> http://www.amibroker.com/support.html
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
>
>
> Please note that this group is for discussion between users only.
>
> To get support from AmiBroker please send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> http://www.amibroker.com/devlog/
>
> For other support material please check also:
> http://www.amibroker.com/support.html
>
> Yahoo! Groups Links
>
>
>
>
Please note that this group is for discussion between users only.
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SUPPORT {at} amibroker.com
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