?? fig09_06.pl
字號:
#!/usr/bin/perl
# Fig. 9.6: fig09_06.pl
# Demonstrating special properties of chomp.
my $string1 = "This is a string";
print "\$string1 is \"$string1\"";
print "\n\nChanging \$/ to \"g\" \n\n";
$/ = "g";
# Removing last character if it is equal to "g"
chomp ( $string1 );
print "The new \$string1 is \"$string1\"\n";
my $string2 = "This is a string with three newlines\n\n\n";
print "\n\$string2 now is \"$string2\" <-- Where \$string2 ends.";
print "\n\nChanging \$/ to \"\" \n\n";
$/ = "";
# All trailing newlines are removed
my $numberNewlines = chomp ( $string2 );
print "\$string2 was called with chomp.\n";
print "It now has no newlines: \"$string2\"";
# chomp returns the number of characters removed
print "\nchomp returned the number $numberNewlines.\n";
###########################################################################
# (C) Copyright 2001 by Deitel & Associates, Inc. and Prentice Hall. #
# All Rights Reserved. #
# #
# DISCLAIMER: The authors and publisher of this book have used their #
# best efforts in preparing the book. These efforts include the #
# development, research, and testing of the theories and programs #
# to determine their effectiveness. The authors and publisher make #
# no warranty of any kind, expressed or implied, with regard to these #
# programs or to the documentation contained in these books. The authors #
# and publisher shall not be liable in any event for incidental or #
# consequential damages in connection with, or arising out of, the #
# furnishing, performance, or use of these programs. #
###########################################################################
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