Kommentare zu: Multiple return values as class? http://blog.cloudme.org/2010/01/multiple-return-values-as-class/ Blog of the CloudMe Project by Moritz Petersen Sun, 27 Mar 2011 15:18:10 +0000 hourly 1 http://wordpress.org/?v=3.3.1 Von: Christian http://blog.cloudme.org/2010/01/multiple-return-values-as-class/comment-page-1/#comment-253 Christian Mon, 31 May 2010 08:27:42 +0000 http://blog.cloudme.org/?p=71#comment-253 I included a Pair and Triple class in my projects and use them as typed return values. So its easy to return 2 or 3 values and the Generics offer some kind of type safety. I included a Pair and Triple class in my projects and use them as typed return values. So its easy to return 2 or 3 values and the Generics offer some kind of type safety.

]]> Von: Moritz http://blog.cloudme.org/2010/01/multiple-return-values-as-class/comment-page-1/#comment-86 Moritz Mon, 11 Jan 2010 20:59:56 +0000 http://blog.cloudme.org/?p=71#comment-86 That's an idea... That’s an idea…

]]> Von: Rusty Wright http://blog.cloudme.org/2010/01/multiple-return-values-as-class/comment-page-1/#comment-85 Rusty Wright Mon, 11 Jan 2010 20:58:01 +0000 http://blog.cloudme.org/?p=71#comment-85 Then make the method name describe what's happening; cropByPercentage for example. Then make the method name describe what’s happening; cropByPercentage for example.

]]> Von: Moritz http://blog.cloudme.org/2010/01/multiple-return-values-as-class/comment-page-1/#comment-84 Moritz Mon, 11 Jan 2010 07:57:59 +0000 http://blog.cloudme.org/?p=71#comment-84 The problem here is, that the crop operation transforms the coordinates into a different metric. While the input is pixel-based, the output is percentage. This would lead to misleading code, such as: <code><pre> Rectangle r = new Rectangle(800, 600); Rectangle cropped = r.crop(210, 210); // cropped.w = 0.66f // cropped.h = 1.0f // huh? </pre></code> That's why I decided for a special class. The problem here is, that the crop operation transforms the coordinates into a different metric. While the input is pixel-based, the output is percentage. This would lead to misleading code, such as:

Rectangle r = new Rectangle(800, 600);
Rectangle cropped = r.crop(210, 210);
// cropped.w = 0.66f
// cropped.h = 1.0f
// huh?

That’s why I decided for a special class.

]]> Von: Rusty Wright http://blog.cloudme.org/2010/01/multiple-return-values-as-class/comment-page-1/#comment-83 Rusty Wright Mon, 11 Jan 2010 02:46:05 +0000 http://blog.cloudme.org/?p=71#comment-83 I think it might be Item 15, Minimize Mutability. I think it might be Item 15, Minimize Mutability.

]]> Von: Rusty Wright http://blog.cloudme.org/2010/01/multiple-return-values-as-class/comment-page-1/#comment-82 Rusty Wright Mon, 11 Jan 2010 02:40:43 +0000 http://blog.cloudme.org/?p=71#comment-82 I think I would create my own Rectangle class and add a method to it, cropped(float w, float h) which returns a new (immutable) Rectangle. Similar to all those methods on java.lang.String; the original String is immutable and there are a bunch of converters or transformers, if you will, that return a new String. Josh Bloch talks about this in one of his items in Effective Java. I think I would create my own Rectangle class and add a method to it, cropped(float w, float h) which returns a new (immutable) Rectangle. Similar to all those methods on java.lang.String; the original String is immutable and there are a bunch of converters or transformers, if you will, that return a new String. Josh Bloch talks about this in one of his items in Effective Java.

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