1. The Joy
of Smart Match

2. The Joy
of Smartmatch

3. The Joy
of ~~

4. Introduced
in Perl 5.10

5. Introduced
in 2007

7. How it was initially designed

8. How it is proposed to be

9. How it looks like now
no
if
$]
>=
5.018,
"experimental::smartmatch";

11. How I use it

12. help()
if
'-­‐-­‐help'
~~
@ARGV;
Quick command line argument test

13. someth()
if
$value
~~
@arr;
Quick array element existance test

14. someth()
if
grep
{$_
==
$value}
@arr;
Better than

15. someth()
if
grep
{$_
eq
$value}
@arr;
Better than

16. someth()
if
grep
{$value
=~
$_}
@arr;
Better than

17. if
($remote_addr
~~
['12.45.67.99',
'59.44.11.33']
)
{...}
Quick IP address test

18. if
([$loaded_user,
$editable_user]
~~
[
[
'OWNER',
'ADMIN'],
[['ADMIN',
'OWNER'],
'USER'
]
]
)
{
$loaded_user-­‐>create($editable_user)
}
Someone's similar usage

19. sub
route
{
'/'
}
URL match test
$page-­‐>render
if
$url
~~
$page-­‐>route;

20. sub
route
{
qr{^/admin/}
}
URL match test
$page-­‐>render
if
$url
~~
$page-­‐>route;

21. ~~
is very Perlish

22. Save the ~~

23. __END__
Andrew Shitov andy@shitov.ru
May 2013