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Re: not able to get the output using split function

by AnomalousMonk (Chancellor)
on Sep 02, 2012 at 07:44 UTC ( #991242=note: print w/replies, xml ) Need Help??


in reply to not able to get the output using split function

ulaksh:
Two points spring to mind. First, in your OP you do not show the input, thus forcing NetWallah to guess in his reply that maybe you had not properly quoted the command-line argument(s). Please see How do I post a question effectively?.

Second (and far worse, IMHO), you forced yourself to guess at the input by not including some fairly simple debug statements in your code. A few well-placed print statements or array or hash dump statements can bring blessed enlightenment. (There is also the integrated Perl debugger, see perldebug, but that takes a little effort to learn and many programmers go through their entire careers doing little more than sprinkling some debug print statements strategically through their code.)

>perl -wMstrict -le "use Data::Dump; ;; my $sentence = shift; print qq{shifted: '$sentence'}; ;; my @words = split(/\s+/, $sentence); dd \@words; ;; my $i; for($i=0;$i<scalar (@words);$i++) { print qq{$i: $words[$i]}; } " the quick brown fox shifted: 'the' ["the"] 0: the

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[ovedpo15]: how fast and a good way to print error if more than one out of three variables are defined? for example if there are $a $b $c. I want that if for example $a and $b are defined - print error (also for $a and $c or $b and $c)
[ovedpo15]: its easy with three "if"s or one long "if" but is there a "nice" way :)

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