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From: scallassig@mailexpire.com (Harald Korneliussen)
Newsgroups: comp.lang.ada
Subject: Re: Simple library functions
Date: 13 Feb 2004 04:54:11 -0800
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scallassig@mailexpire.com (Harald Korneliussen) wrote in message news:<19401efb.0402122318.68154453@posting.google.com>...
> Jeffrey Carter <spam@spam.com> wrote in message news:<kdVWb.1821
> 
> > 
> > There's no function for that in the standard library because it's part 
> > of the language. Others have pointed out the 'Value attribute.
> 
> Oops, you're right of course. I found it right after I posted, in a
> tutorial. I couln't find it in the RM however, but then again I looked
> at strings and integers only, not attributes.
>  
> > I have no idea what String.split does in Java, but I suspect it's 
> > similar to Ada.Strings.(Fixed | Bounded | Unbounded).Find_Token. If not, 
> > you could look at www.adapower.com or www.adahome.com for Open_Token.
> 
> String.split works like this:
> 
> String s = "hi he ha ho"
> 
> String strings[] = s.split();
> 
> // strings[] is now {"hi", "he", "ha", "ho"}
> 
> In java it takes a regexp, with " \t\n" as default. My function takes
> a set of characters (from Ada.Characters.Maps), with the set of
> whitespace as default.
> 
> I'll be right back....

Apropos that: when I looked at gnat's regexp package I saw a comment
about certain functions being evaluated twice, once to determine the
size and another time to actually produce the results. Have I
understood correctly that in for instance

s : String := function_returning_a_string_of_variable_length(junk :
Integer);

the function is actually evaluated twice? (Stupid question of me to
ask, really, but I don't have an Ada compiler at school). Would it do
that in java too?