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David Finlayson-4

[vwnc] Something like printf?

I am looking for something like printf's for streams. I need to
control the precision of numbers being output to a text file.

Thanks,

David
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Andres Valloud-6

Re: [vwnc] Something like printf?

You may want to take a look at the method below. IIRC, it has been
added for 7.7, but should work on 7.6 and earlier.

Number>>printFormat: aFormatPattern
"Shorthand for printing numbers with a given format. See
NumberPrintPolicy's comment for format description."
"100 printFormat: '#.0'"
"Double pi printFormat: '000.####'"

| stream |
stream := (String new: aFormatPattern size) writeStream.
self printOn: stream format: aFormatPattern.
^stream contents

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On
Behalf Of David Finlayson
Sent: Wednesday, May 13, 2009 2:32 PM
To: VW NC
Subject: [vwnc] Something like printf?

I am looking for something like printf's for streams. I need to control
the precision of numbers being output to a text file.

Thanks,

David
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Eliot Miranda-2

Re: [vwnc] Something like printf?

In reply to this post by David Finlayson-4

On Wed, May 13, 2009 at 2:31 PM, David Finlayson <[hidden email]> wrote:

I am looking for something like printf's for streams. I need to
control the precision of numbers being output to a text file.

You could start from Squeak's facilities such as printPaddedWith:to:, e.g.

"Answer the string containing the ASCII representation of the receiver

padded on the left with aCharacter to be at least on aNumber

integerPart characters and padded the right with aCharacter to be at

least anInteger fractionPart characters."

((1000 / 3) roundTo: 0.001) printPaddedWith: $_ to: 4.2 '_333.333_'

Buggy but fixable.

Thanks,

David
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Joachim Geidel

Re: [vwnc] Something like printf?

In reply to this post by David Finlayson-4

Re: [vwnc] Something like printf? The package “JNIPort StandardLibInterface” in the Cincom public repository contains extensions to String for calling snprintf(), supporting the complete set of printf formats. You should load the bundle “JNIPort Prerequisites” to get everything which is needed. The license allows you to extract what you need into your own – probably much smaller – package.

The StandardLibInterface interface lets you do things like
'[%*.*f][%*.*e]' sprintfWithArguments: #(12 2 3.141592653 12 2 3.141592653) ==> '[ 3.14][ 3.14e+00]'

HTH,
Joachim Geidel

Am 13.05.09 23:31 schrieb David Finlayson:

I am looking for something like printf's for streams. I need to
control the precision of numbers being output to a text file.

Thanks,

David
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Georg Heeg

Re: [vwnc] Something like printf?

In reply to this post by David Finlayson-4

ObjectStudio has full support of printf

Georg

Georg Heeg eK, Dortmund und Köthen, HR Dortmund A 12812
Tel. +49-3496-214328, Fax +49-3496-214712

> -----Ursprüngliche Nachricht-----
> Von: [hidden email] [mailto:[hidden email]] Im Auftrag
> von David Finlayson
> Gesendet: Mittwoch, 13. Mai 2009 23:32
> An: VW NC
> Betreff: [vwnc] Something like printf?
>
> I am looking for something like printf's for streams. I need to
> control the precision of numbers being output to a text file.
>
> Thanks,
>
> David
> _______________________________________________
> vwnc mailing list
> [hidden email]
> http://lists.cs.uiuc.edu/mailman/listinfo/vwnc

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