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(code) Array Play

by ybiC (Prior)
on Apr 30, 2001 at 07:07 UTC ( #76539=snippet: print w/replies, xml ) Need Help??
Description: A nothing snippet illustrating a few rudimentary array capabilities.   Extra points for recognizing what book I've been re-reviewing {grin}

Slightly more idiomatic for(@list) syntax.
Cleaner OS-based break character detection (commented out), with ternary op syntax active.
Remove unecessary srand call.   Thanks tilly, for mentioning that.   8^)
Add Win32 detection for OS-specific prompting.
Move $random before $first and $last so all names included in random selection.   Thanks Albannach, for pointing that out.   8^)

#!/usr/bin/perl -w

# 2002-03-20   22:10 CST
# 2001-04-30

use strict;

# using ternary op:
my $donechar = $^O =~ /MSWin32/ ? 'CTRL+Z<enter>' : 'CTRL+D';
print "\n  Enter words, follow each with <enter>.\n";
print  "  $donechar after final <enter>.\n\n";

# same thing, but with default val+if:
# my $donechar = 'CTRL+D';
# $donechar    = 'CTRL+Z<enter>' if ($^O eq 'MSWin32');
# print "\n  Enter words, follow each with <enter>.\n";
# print  "  $donechar after final word+<enter>.\n\n";

chomp(my @words = <STDIN>);
print "\n  ", $#words+1, " words entered.\n";

my $random = rand(@words);
my $first  = shift(@words);
my $last   = pop(@words);

unshift(@words, $first);
push(@words, $last);
  "    first entry:  $first\n",
  "    last entry:   $last\n",
  "    random entry: $words[$random]\n",

print "  as entered:\n";

print "  reverse order:\n";
my @reversed = reverse(@words);

print "  sorted alphabetically:\n";
my @sorted = sort(@words);

print "  reverse alphabetic:\n";
my @revalpha = reverse(@sorted);

if ($^O eq 'MSWin32') {
  print "  Hit <enter> to exit.";

sub PrintList {
  print "    $_\n" for(@_);
  print "\n";
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Node Type: snippet [id://76539]
[shmem]: It's common for some vendors to have column names such as WRSTVG or some other such whizzbang, and another table where these names are mapped to something meaningful depending on how you look at the data
[shmem]: afair in SAP that occurs all the time
[shmem]: afair in SAP that sort of indirection is sprinkled all over the database (for hysterical raisins)

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