numeric manipulation

gerry622 has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: numeric manipulation by Eliya (Vicar) on Mar 11, 2011 at 18:43 UTC
`my $input = "7-12"; my ($start, $end) = split /-/, $input; my @output = $start..$end; print "@output\n"; # 7 8 9 10 11 12` [download]	[reply] [d/l]
Re: numeric manipulation by BrowserUk (Patriarch) on Mar 11, 2011 at 18:43 UTC
This is one of several ways to do this, but if it is homework, you'd better hit PerlDoc and make sure you can explain how your chosen solution works: `$input = '7-12'; $input =~ /(\d+)-(\d+)/ and print $1 .. $2 or die 'Bad input';; 7 8 9 10 11 12` [download] Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply] [d/l]
Re: numeric manipulation by Fletch (Bishop) on Mar 11, 2011 at 18:53 UTC
See also Set::IntSpan The cake is a lie. The cake is a lie. The cake is a lie.	[reply]
Re^2: numeric manipulation by CheeseConQueso (Initiate) on Mar 11, 2011 at 20:08 UTC
ahahahhahahahahahah	[reply]
Re: numeric manipulation by CountZero (Bishop) on Mar 11, 2011 at 18:56 UTC
`use Modern::Perl; use Parse::Range; my @range = parse_range('7-12'); say "@range";` [download] CountZero A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James	[reply] [d/l]
Re: numeric manipulation by FunkyMonk (Bishop) on Mar 11, 2011 at 19:02 UTC
The previous replies were all too pretty... `perl -wE '$_ = "7-12"; say join " ", [/(\d+)-/]->[0]..[/-(\d+)/]->[0]'` [download] :-) Update: slightly less ugly? `perl -wE '$_ = "7-12"; say join " ", (/(\d+)-/)[0]..(/-(\d+)/)[0]'` [download]	[reply] [d/l] [select]
Re: numeric manipulation by JavaFan (Canon) on Mar 11, 2011 at 19:35 UTC
can this be done without a loop No. There will always be a loop, even if it's not immediately obvious.	[reply]