Hi,

This is all very interesting.

So 'Character cr asciiValue' is 13 'Character lf asciiValue' is 10

and ascii value of the \n character in Python is

...

...

ord('\n')

10

So I want to use 'String lf' inplace of a \n in Python during string concatenation.

Thanks

Paul

On Sun, Aug 2, 2009 at 2:39 PM, C. David Shaffercdshaffer@acm.org wrote:

Michael van der Gulik wrote:

...

On Fri, Jul 31, 2009 at 8:48 AM, Paul DeBruicker <pdebruic@gmail.com mailto:pdebruic@gmail.com> wrote:

Hi -

What Character or String is equal to \n in C or Python?  Thanks

I remember wondering about this when I was first learning Smalltalk too.

You do stuff like:

s := WriteStream on: (String new: 100). s nextPutAll: 'Hello World'. "Write a string" s nextPut: $!.             "Write a single character" s cr.             "Write a newline character"

It's a bit wordy, but I think streams deserve a lot more credit than programmers give them.

If you're doing String concatenation:

myString := 'Hello, World!', String cr.

Alternatively, this is also valid code:

myString := 'This is a multi-line String! '.

Great summary.  I'll add:

'this\is\a\string' withCRs

which produces this is a string

If you look at the source code for withCRs you can probably see how easy it would be to write something more to your liking.

David

David

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Ok so for smalltalk specific code I'll use cr

The reason I needed to know is that I need to make an HMAC-SHA256 hash of a multiline string and submit it to a third party for processing. In their java and python examples they concatenated in a \n to form the multiple line string. At the time I asked, what I was calculating was incorrect so as part of trying to figure out where I had the calculation wrong I wanted to make sure I was using the proper substitute

Thanks again for the help

Paul

On Aug 2, 2009, at 5:51 PM, Bert Freudenberg bert@freudenbergs.de wrote:

On 02.08.2009, at 23:20, Paul DeBruicker wrote:

...

So 'Character cr asciiValue' is 13 'Character lf asciiValue' is 10

and ascii value of the \n character in Python is

...

...

...

ord('\n')

10

So I want to use 'String lf' inplace of a \n in Python during string concatenation.

#lf is rarely used in Squeak code. Typically we use #cr. E.g., if you want a line break while writing to the Transcript you would send #cr. Same if you want a line break in a text file. Rather than switching between #cr, #lf, and #crlf depending on the platform being a Mac, Unix, or Windows, we only use #cr and rather set the stream to the right line end conversion method.

• Bert -

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