6 ['\N{named character}'],
9 ['sub :locked :method'],
10 ['open $fh, $mode, $expr'],
17 ['//', 'defined-or operator'],
18 ['~~', 'smart-match operator to compare different data types'],
19 ['given', 'switch statement to smart-match with when/default'],
20 ['/(?<name>)/ and $+{name}', 'named caputer buffers'],
21 ['s/keep\K//', 'floating positive lookbehind, efficient alternative for s/(keep)/$1/'],
22 ['/\v/, /\h/', 'vertical and horizontal whitespace escapes'],
23 ['my $_', 'lexically scoped version of the default variable'],
26 ['package version', 'package NAME VERSION shorthand for our $VERSION"'],
27 ['...', 'yada-yada operator: code placeholder'],
28 ['use strict', 'Implicit strictures if use VERSION >= 5.12'],
29 ['... when', '"when" is now allowed to be used as a statement modifier'],
32 ['s///r', 'non-destructive substitution'],
33 ['/(?^)/', 'construct to reset to default modifiers'],
34 ['/(?{ m// })/', 'regular expressions can be nested in /(?{})/ and /(??{})/'],
35 ["use re '/flags'", 'customize default modifiers'],
36 ['each $ref e.a.', 'array and hash container functions accept references'],
39 ['__SUB__', 'current subroutine reference'],
40 ['fc, "\F"', 'unicode foldcase to compare case-insensitively'],
41 ['"\N{}"', 'automatic use charnames qw( :full :short )'],