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argra****@users*****
2012年 5月 21日 (月) 22:41:01 JST
Index: docs/perl/5.10.1/perlfaq4.pod
diff -u docs/perl/5.10.1/perlfaq4.pod:1.11 docs/perl/5.10.1/perlfaq4.pod:1.12
--- docs/perl/5.10.1/perlfaq4.pod:1.11 Fri Aug 26 10:31:16 2011
+++ docs/perl/5.10.1/perlfaq4.pod Mon May 21 22:41:00 2012
@@ -4390,7 +4390,7 @@
my $key_count = keys %hash; # must be scalar context!
=begin original
-
+
If you want to find out how many entries have a defined value, that's
a bit different. You have to check each value. A C<grep> is handy:
@@ -4417,7 +4417,7 @@
my $vowel_count = grep { /[aeiou]/ } keys %hash;
=begin original
-
+
The C<grep> in scalar context returns the count. If you want the list
of matching items, just use it in list context instead: