Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

Re: remove spaces after join operation

by AnomalousMonk (Abbot)
on Jul 26, 2013 at 14:41 UTC ( #1046525=note: print w/ replies, xml ) Need Help??


in reply to remove spaces after join operation

Others have noted the approach of join-ing a list of strings with a space and then taking spaces out of the string where appropriate. Conceptually, the other approach is to not put in a space in the first place. See List::Util::reduce().

>perl -wMstrict -le "my @first_sentence = qw{ i am 2 ( but ) . }; printf qq{'$_' } for @first_sentence; print ''; ;; my $ns = qr{ [().] }xms; ;; my $sentence = join q{ }, @first_sentence; print qq{'$sentence'}; ;; $sentence =~ s{ [ ] (?= $ns) | (?<= $ns) [ ] }''xmsg; print qq{'$sentence'}; ;; ;; use List::Util qw(reduce); ;; $sentence = ''; $sentence = reduce { ($a =~ $ns || $b =~ $ns) ? qq{$a$b} : qq{$a $b} } @first_sentence ; print qq{'$sentence'} " 'i' 'am' '2' '(' 'but' ')' '.' 'i am 2 ( but ) .' 'i am 2(but).' 'i am 2(but).'

Update: Actually, this is what 2teez already did here.


Comment on Re: remove spaces after join operation
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1046525]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others wandering the Monastery: (15)
As of 2015-07-31 20:03 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (281 votes), past polls