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  1. my $str = "         word1     word2\n     word3     word4     word5\n";
  2. print "str before = $str\n";
  3. $str =~ s/(?<!^)(?<![ ])[ ]+/ /mg;
  4. print "str after  = $str\n";
Success #stdin #stdout 0s 4552KB
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Standard input is empty
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str before =          word1     word2
     word3     word4     word5

str after  =          word1 word2
     word3 word4 word5
https://ideone.com/jYID9o
language:
Perl (perl 5.28.1)
created:
11 years ago
visibility:
public

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