Comments on: Creating a Calculator Class http://www.convalesco.org/2006/11/20/creating-a-calculator-class/ Growing stronger every day! Tue, 06 Jan 2009 14:44:00 +0000 http://wordpress.org/?v=2.7 hourly 1 By: bobbyRicky http://www.convalesco.org/2006/11/20/creating-a-calculator-class/comment-page-1/#comment-313 bobbyRicky Thu, 22 Feb 2007 08:12:11 +0000 http://atma.wordpress.com/2006/11/20/creating-a-calculator-class/#comment-313 beautiful online information center. greatest work… thanks beautiful online information center. greatest work… thanks

]]> By: atma http://www.convalesco.org/2006/11/20/creating-a-calculator-class/comment-page-1/#comment-312 atma Fri, 24 Nov 2006 14:09:53 +0000 http://atma.wordpress.com/2006/11/20/creating-a-calculator-class/#comment-312 I didn't knew the differences thank you for the enlightment :-) I'll keep that in mind. For now I do mostly exercises that the book shows. I'm dealing with general purpose concepts. However the main idea is to be able to write cocoa applications sooner of later.. so your tips are very useful. I didn’t knew the differences thank you for the enlightment :-) I’ll keep that in mind. For now I do mostly exercises that the book shows.

I’m dealing with general purpose concepts. However the main idea is to be able to write cocoa applications sooner of later.. so your tips are very useful.

]]> By: cosmix http://www.convalesco.org/2006/11/20/creating-a-calculator-class/comment-page-1/#comment-311 cosmix Fri, 24 Nov 2006 13:51:46 +0000 http://atma.wordpress.com/2006/11/20/creating-a-calculator-class/#comment-311 Ah, you were using 'pure' Objective-C. Apologies, I was referring to Cocoa (or at least Foundation). You see, even with simple command line tools, it's a good idea to leverage the features provided by the Foundation classes. You won't find release and dealloc in the 'pure' objc runtime, as they are part of NSObject. At some point you will essentially be forced to import at least Foundation to do any sort of meaningful work. I'd suggest you spend some time familiarising yourself with NSObject, as opposed to the pure ObjC 'Object' as you probably won't be using the latter too much. Ah, you were using ‘pure’ Objective-C. Apologies, I was referring to Cocoa (or at least Foundation). You see, even with simple command line tools, it’s a good idea to leverage the features provided by the Foundation classes.

You won’t find release and dealloc in the ‘pure’ objc runtime, as they are part of NSObject. At some point you will essentially be forced to import at least Foundation to do any sort of meaningful work. I’d suggest you spend some time familiarising yourself with NSObject, as opposed to the pure ObjC ‘Object’ as you probably won’t be using the latter too much.

]]> By: atma http://www.convalesco.org/2006/11/20/creating-a-calculator-class/comment-page-1/#comment-310 atma Fri, 24 Nov 2006 11:58:27 +0000 http://atma.wordpress.com/2006/11/20/creating-a-calculator-class/#comment-310 Hello there Cosmix! Actually the #import was <i>naked</i> because completelly missing html tags, I didn't notice that the < and > characters needed special html tags to be displayed. Now compiles at least via command line: <blockquote> OSX atma ~ $ file calculator.m calculator.m: ASCII C program text OSX atma ~ $ gcc calculator.m -o calculator -l objc OSX atma ~ $ ./calculator The result is 50 OSX atma ~ $ </blockquote> As for [calc free], I've read in the manual that it's the <i>a way to release the allocated & initialized memory</i>. I didn't knew that there is another way to do it and I don't have a clue about the differences. I'll try out the [object release]; method asap! Thnx for the tips :-) Hello there Cosmix!

Actually the #import was naked because completelly missing html tags, I didn’t notice that the < and > characters needed special html tags to be displayed.

Now compiles at least via command line:

OSX atma ~ $ file calculator.m
calculator.m: ASCII C program text
OSX atma ~ $ gcc calculator.m -o calculator -l objc
OSX atma ~ $ ./calculator
The result is 50
OSX atma ~ $

As for [calc free], I’ve read in the manual that it’s the a way to release the allocated & initialized memory. I didn’t knew that there is another way to do it and I don’t have a clue about the differences. I’ll try out the [object release]; method asap!

Thnx for the tips :-)

]]> By: cosmix http://www.convalesco.org/2006/11/20/creating-a-calculator-class/comment-page-1/#comment-309 cosmix Thu, 23 Nov 2006 21:07:10 +0000 http://atma.wordpress.com/2006/11/20/creating-a-calculator-class/#comment-309 Hmmm. I don't think what you have there actually compiles, let alone runs without errors, at least on Apple's implementation of Objective-C. What kind of compiler/libraries did you use for this? And for which version of Objective-C? For starters while you're extending <code>Object</code>. NextStep/Cocoa defines <code>NSObject</code>. Then you do <code>[calc free]</code>. The correct way to release an object is by <code>[object release]</code>, or --- this is <strong>not</strong> recommended --- [object dealloc]. Perhaps you were thinking of C? Good to see more people coding in Objective-C. Good luck. Hmmm. I don’t think what you have there actually compiles, let alone runs without errors, at least on Apple’s implementation of Objective-C. What kind of compiler/libraries did you use for this? And for which version of Objective-C?

For starters while you’re extending Object. NextStep/Cocoa defines NSObject. Then you do [calc free]. The correct way to release an object is by [object release], or — this is not recommended — [object dealloc]. Perhaps you were thinking of C?

Good to see more people coding in Objective-C. Good luck.

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