PureBasic Forums - English

Does anyone know how to write a VU meter in Linux? It doesn't need to do much, simply watch the sound input and output and show signal strength. I don't need a graphical component at this point, just a simple program that will watch the audio and give me some kind of numbers.

Thanks

Excellent. That's perfect!

Alex

WishMaster wrote:You can try this:

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RunProgram("xset", "dpms force suspend", "")

or this:

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RunProgram("xset", "dpms force standby", "")

Does anyone know a good way to blank the screen with Purebasic under Linux? I need to be able to turn the screen off with a single mouse click, and have it turn back on in response to the usual kinds of input - mouse, keyboard, etc.

Alex

Cool! Thankyou!

Alex

PB wrote:

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today=Date()
yesterday=AddDate(today,#PB_Date_Day,-1)
Debug FormatDate("%dd-%mm-%yyyy",yesterday)

Has anyone written a routine to find the day before the current date? In other words, if it's April 3rd, 2004, I need a routine that give me April 2nd, 2004. This needs to handle such issues as leap years, months with 31, 30, or 28 days, etc.

Thanks,

Alex

If my network application crashes and I need to restart it, I get the following error message:

"Waiting for port to open."

When I get this error message, it takes a minute or two for the port to clear, during which clients can't reach the server. Is there a way to proactively clear the port so it ...

I've woken up now and i want to clarify one point. :)

Val("0")

This code does NOT return false. It returns the numeric value of the literal string passed. Which in Purebasic just so happens to be what it uses as a false value.

Pardon me for beating a dead horse, but doesn't this mean that any ...

I'm verifying. PB and I are fine.

Alex

PB wrote:> Mmm, pretty girls make everything better.

You are so right.

Alex

Hi Alex,

Val means "Value Of", not validate.

A false condition in PureBasic is one that returns 0, and a true condition is therefore anything that does not return a false, therefore anything other than zero.

The one and only purpose of Val() is to convert the contents of a string variable to a ...

Looking at your code, it seems to me you are after some kind of Isnumeric() routine, several examples of which you can find on the forum if you do a search. Val() is not designed for this task.

Thanks for the code snippet. I've found a workaround which works very nicely. In fact, I found it ...

>You are trying to use the command in a way it's not meant to be used! Can someone else here please tell him, because he's not willing to listen to me.

Thanks for the help you've offered. I do appreciate the attempt even though we disagree. We both want PureBasic to be better, and I'd rather stop ...

> To clarify: what I meant is that he is using Val incorrectly, which is why it fails
and doesn't give him the results he is expecting.

Val is meant to return a value of the string. That's why you can't use it like
"If Val(string$)" -- IT'S NOT MEANT TO BE USED THAT WAY. Read the manual ...

Kale wrote:If the result of any expression or value that follows this 'If' keyword so happens to be a '0' (zero) then it is determined to be false. Otherwise it is true. :)

So any operation which results in a "0," no matter how accurate, will result in a "false" result in any test?

Alex

Val("0") will return 0, which is false in condition.

Maybe I'm unclear on the concept. Shouldn't Val() (or any other operation) return two pieces of information; a true/false value AND a result, and shouldn't "If" look at the true/false value rather than the result?

Does Val("0") give a value of ...