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Utility for arrays? [message #645445]

Fri, 17 December 2010 09:43

Michael Schaufelberger

Messages: 3
Registered: December 2010

Junior Member

Scout's utilities are very practical. E.g. if I want to know the length of a string variable "text", instead of writing

int length = text == null ? 0 : text.length();

I can use the StringUtility:

int length = StringUtility.length(text);

Is there a similar way for arrays (e.g. byte[])? I only found the CollectionUtility with which I'd have to convert my array to a List. Why is there no ArrayUtility?

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Re: Utility for arrays? [message #645451 is a reply to message #645445]

Fri, 17 December 2010 09:59

Stephan Leicht Vogt

Messages: 104
Registered: July 2015

Senior Member

To get the length of an array you could to following:

int size = ListUtility.toList(someByte[]).size();

This will work without exception even if someByte[] would be null.

But i filed a bug to make this even more easy: https://bugs.eclipse.org/bugs/show_bug.cgi?id=332831

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Re: Utility for arrays? [message #645461 is a reply to message #645451]

Fri, 17 December 2010 10:12

Michael Schaufelberger

Messages: 3
Registered: December 2010

Junior Member

Thanks for the fast reply and filing the bug!

Actually, I tried your workaround before already, but did not realize that printing the result seems changes it (?):

byte[] b = null;
System.out.println(ListUtility.toList(b).size());

prints "1" even though size() returns 0 (at least in debug mode)

weird..

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Re: Utility for arrays? [message #645481 is a reply to message #645461]

Fri, 17 December 2010 12:24

Michael Schaufelberger

Messages: 3
Registered: December 2010

Junior Member

It seems that eclipse's "inspect" in debug mode shows the wrong value, size() really returns 1:

byte[] b = null;
System.out.println(1 == ListUtility.toList(b).size());

outputs "true"

so I still have to write

output == null ? 0 : output.length

until there's an ArrayUtility

however, any other suggestions are still appreciated, of course

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