Misc

Case sensitivity

• Perl is case sensitive

Memory management

• Perl offers limited garbage collection (reference counting, rather than mark and sweep)
• Won't catch circular refefernces or self-references
• Mark and sweep is applied when the Perl interpreter shuts down

Misc

• Perl is short for "Practical Extraction and Report Language"
• Licensed under the GPL and Artistic License (in effect, FSF-approved and GPL-compatible)
  

• each

while(($key, $val) = each %ENV) {    # For each environment variable
    print "$key = $val<BR>\n";       # Print the key-value pair
}

• eval
• $@
• modules
• map operator
• use integer;
• use sigtrap qw(SEGV BUS);
• use strict qw(subs vars refs);
• # End of script
  
• Alias
  
• TTY
  

• Historical name, "tty" stands for "teletypewriter"
• Refers to a command-line terminal (CLI, "command line interface")

• $!
• <>  : Null filehandle