Minor cleanups on the booklist.

[p5sagit/p5-mst-13.2.git] / pod / perlfaq4.pod

diff --git a/pod/perlfaq4.pod b/pod/perlfaq4.pod
index 838f753..ecbd652 100644 (file)
--- a/pod/perlfaq4.pod
+++ b/pod/perlfaq4.pod
@@ -282,8 +282,8 @@ and Date::Manip modules from CPAN.
 
 =head2 How can I find the Julian Day?
 
-You could use Date::Calc's Delta_Days function and calculate the number
-of days from there.  Assuming that's what you really want, that is.
+Use the Time::JulianDay module (part of the Time-modules bundle
+available from CPAN.)
 
 Before you immerse yourself too deeply in this, be sure to verify that it
 is the I<Julian> Day you really want.  Are they really just interested in
@@ -301,9 +301,6 @@ world and 1980 in the MS-DOS/Windows world.  If you find that it is not
 the first meaning that you really want, then check out the Date::Manip
 and Date::Calc modules.  (Thanks to David Cassell for most of this text.)
 
-There is also an example of Julian date calculation that should help you in
-http://www.perl.com/CPAN/authors/David_Muir_Sharnoff/modules/Time/JulianDay.pm.gz
-
 =head2 How do I find yesterday's date?
 
 The C<time()> function returns the current time in seconds since the
@@ -447,11 +444,9 @@ nested patterns, nor can they.  For that you'll have to write a
 parser.
 
 If you are serious about writing a parser, there are a number of
-modules or oddities that will make your life a lot easier.  There is
-the CPAN module Parse::RecDescent, the standard module Text::Balanced,
-the byacc program, the CPAN module Parse::Yapp, and Mark-Jason
-Dominus's excellent I<py> tool at http://www.plover.com/%7Emjd/perl/py/
-.
+modules or oddities that will make your life a lot easier.  There are
+the CPAN modules Parse::RecDescent, Parse::Yapp, and Text::Balanced;
+and the byacc program.
 
 One simple destructive, inside-out approach that you might try is to
 pull out the smallest nesting parts one at a time:
@@ -468,7 +463,7 @@ really does work:
     # $_ contains the string to parse
     # BEGIN and END are the opening and closing markers for the
     # nested text.
- 
+
     @( = ('(','');
     @) = (')','');
     ($re=$_)=~s/((BEGIN)|(END)|.)/$)[!$3]\Q$1\E$([!$2]/gs;
@@ -824,7 +819,7 @@ Stringification also destroys arrays.
     print "@lines";            # WRONG - extra blanks
     print @lines;              # right
 
-=head2 Why don't my E<lt>E<lt>HERE documents work?
+=head2 Why don't my <<HERE documents work?
 
 Check for these three things:
 
@@ -943,7 +938,8 @@ with
 
     @bad[0]  = `same program that outputs several lines`;
 
-The B<-w> flag will warn you about these matters.
+The C<use warnings> pragma and the B<-w> flag will warn you about these 
+matters.
 
 =head2 How can I remove duplicate elements from a list or array?
 
@@ -1073,7 +1069,7 @@ strings.  Modify if you have other needs.
 
     sub compare_arrays {
        my ($first, $second) = @_;
-       local $^W = 0;  # silence spurious -w undef complaints
+       no warnings;  # silence spurious -w undef complaints
        return 0 unless @$first == @$second;
        for (my $i = 0; $i < @$first; $i++) {
            return 0 if $first->[$i] ne $second->[$i];
@@ -1285,7 +1281,7 @@ Supply a comparison function to sort() (described in L<perlfunc/sort>):
     @list = sort { $a <=> $b } @list;
 
 The default sort function is cmp, string comparison, which would
-sort C<(1, 2, 10)> into C<(1, 10, 2)>.  C<E<lt>=E<gt>>, used above, is
+sort C<(1, 2, 10)> into C<(1, 10, 2)>.  C<< <=> >>, used above, is
 the numerical comparison operator.
 
 If you have a complicated function needed to pull out the part you
@@ -1748,11 +1744,10 @@ if you just want to say, ``Is this a float?''
 
     sub is_numeric { defined getnum($_[0]) } 
 
-Or you could check out
-http://www.perl.com/CPAN/modules/by-module/String/String-Scanf-1.1.tar.gz
-instead.  The POSIX module (part of the standard Perl distribution)
-provides the C<strtol> and C<strtod> for converting strings to double
-and longs, respectively.
+Or you could check out the String::Scanf module on CPAN instead.  The
+POSIX module (part of the standard Perl distribution) provides the
+C<strtod> and C<strtol> for converting strings to double and longs,
+respectively.
 
 =head2 How do I keep persistent data across program calls?