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A few nits with the regex bits (these are common traps, even for experts):
  • The regex metacharacter ^ means "start of string", not "start of line" (unless the /m modifier is used)
  • The regex metacharacter $ means "end of string", not "end of line" (unless the /m modifier is used)
  • . is "any char except \n" or just "not \n" (unless the /s modifier is used)

A few possible additions:

  • Regex "start of string" is \A
  • Regex "end of string" is \Z
  • Regex "absolute end of string (i.e. no trailing \n) is \z
  • Another commonly ignored "NEVER" is: /$userinput/

In reply to Re: Perl cheat sheet by TheDamian
in thread Perl cheat sheet by Juerd

Title:
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and:  <code> code here </code>
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