perlfaq4: multiple answers affected

* Why doesn't & work the way I want it to?
   + change the result of 11 & 3 to the correct one (3)
   
* How do I find the current century or millennium?
   + mention POSIX::strftime which is a lot easier to read
   than the other examples.

* How can I make my hash remember the order I put elements into it?
   + made strict clean


Index: perlfaq4.pod
===================================================================
RCS file: /cvs/public/perlfaq/perlfaq4.pod,v
retrieving revision 1.32
diff -u -d -r1.32 perlfaq4.pod
--- perlfaq4.pod        10 Sep 2002 19:49:38 -0000      1.32
+++ perlfaq4.pod        30 Sep 2002 08:41:24 -0000
@@ -263,7 +263,7 @@
 (the number C<3> is treated as the bit pattern C<00000011>).
 
 So, saying C<11 & 3> performs the "and" operation on numbers (yielding
-C<1>).  Saying C<"11" & "3"> performs the "and" operation on strings
+C<3>).  Saying C<"11" & "3"> performs the "and" operation on strings
 (yielding C<"1">).
 
 Most problems with C<&> and C<|> arise because the programmer thinks
@@ -390,11 +390,20 @@
        return 1+int((((localtime(shift || time))[5] + 1899))/1000);
     } 
 
-On some systems, you'll find that the POSIX module's strftime() function
-has been extended in a non-standard way to use a C<%C> format, which they
-sometimes claim is the "century".  It isn't, because on most such systems,
-this is only the first two digits of the four-digit year, and thus cannot
-be used to reliably determine the current century or millennium.
+You can also use the POSIX strftime function which may be a bit
+slower but is easier to read and maintain.
+
+       use POSIX qw/strftime/;
+
+       my $week_of_the_year = strftime "%W", localtime;
+       my $day_of_the_year  = strftime "%j", localtime;
+
+On some systems, the POSIX module's strftime() function has
+been extended in a non-standard way to use a C<%C> format,
+which they sometimes claim is the "century".  It isn't,
+because on most such systems, this is only the first two
+digits of the four-digit year, and thus cannot be used to
+reliably determine the current century or millennium.
 
 =head2 How can I compare two dates and find the difference?
 
@@ -1862,11 +1871,11 @@
 Use the Tie::IxHash from CPAN.
 
     use Tie::IxHash;
-    tie(%myhash, Tie::IxHash);
-    for ($i=0; $i<20; $i++) {
+    tie my %myhash, Tie::IxHash;
+    for (my $i=0; $i<20; $i++) {
         $myhash{$i} = 2*$i;
     }
-    @keys = keys %myhash;
+    my @keys = keys %myhash;
     # @keys = (0,1,2,3,...)
 
 =head2 Why does passing a subroutine an undefined element in a hash create it?