in reply to [Solved] What are these hex character classes?

From Prelre:

\x{}, \x00  character whose ordinal is the given hexadecimal number

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The \x denotes the beginning of a hexadecimal value.

Also see: Unicode character table.

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Re^2: What are these hex character classes?
by three18ti (Monk) on Dec 08, 2013 at 01:35 UTC
    This is great. Thank you!

    So like most things in computing, the zeros are omitted, so \x{A} is actually \x{000A}.

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      You're most welcome, three18ti!

      Perl expectedly parses both as "\n" (the leading zeros aren't significant):

      perl -MO=Deparse,-p -e 'print "\x{A}"'

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      Output:

      print("\n");
-e syntax OK

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      And:

      use warnings;
use strict;

print ord "\x{A}" if "\x{000A}" eq "\n";

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      Output:

      10

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      As you see, \x{A}, \x{000A} and \n all represent the same character.

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