{"id":169469,"date":"2013-02-15T17:25:03","date_gmt":"2013-02-15T13:25:03","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=169469"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=169469","title":{"rendered":"\u0412\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0435 \u0440\u0435\u043a\u0443\u0440\u0440\u0435\u043d\u0442\u043d\u044b\u0445 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0439 \u043d\u0430 Perl<\/span>"},"content":{"rendered":"
\t\u041f\u0440\u0438\u0432\u0435\u0442,
\u0432 \u044d\u0442\u043e\u043c \u043f\u043e\u0441\u0442\u0435 \u044f \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0443 \u0440\u0435\u0446\u0435\u043f\u0442 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0432 \u041f\u0435\u0440\u043b.<\/p>\n

\u041a\u0430\u043a \u0443\u0436\u0435 \u0441\u0442\u0430\u043b\u043e \u043f\u043e\u043d\u044f\u0442\u043d\u043e \u0438\u0437 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u044f, \u043c\u044b \u0431\u0443\u0434\u0435\u043c \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0442\u044c \u0440\u0435\u043a\u0443\u0440\u0440\u0435\u043d\u0442\u043d\u044b\u0435 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u044f.
\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0444\u043e\u0440\u043c\u0443\u043b\u044b \u0434\u043b\u044f \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f \u0444\u0430\u043a\u0442\u043e\u0440\u0438\u0430\u043b\u0430 \u0432\u044b\u0433\u043b\u044f\u0434\u044f\u0442 \u0432\u043e\u0442 \u0442\u0430\u043a: <\/p>\n

 f(0) = 1 f(n) = n * f(n-1) <\/pre>\n
  \u0424\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u044f\u0437\u044b\u043a\u0438 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0442\u044c \u0442\u0430\u043a\u0438\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u043e, \u0432 Erlang \u044d\u0442\u043e \u0434\u0435\u043b\u0430\u0435\u0442\u0441\u044f \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c:  <\/p>\n
factorial(0) ->     1; factorial(N) ->     N * factorial(N-1).<\/pre>\n
  \u0410 \u0442\u0435\u043f\u0435\u0440\u044c \u043f\u043e\u043f\u0440\u043e\u0431\u0443\u0435\u043c \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435\u0447\u0442\u043e \u043f\u043e\u0445\u043e\u0436\u0435\u0435, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u043b\u043e \u0431\u044b \u043d\u0430\u043c \u043f\u0438\u0441\u0430\u0442\u044c \u043a\u043e\u0434 \u0432\u0438\u0434\u0430:  <\/p>\n
#!\/usr\/bin\/perl -I.\/lib<\/font>
  use<\/font> strict;<\/font>
  use<\/font> bigint;<\/font>
   
  use<\/font> Recurrent;<\/font>
   
  recurrent fib =><\/font> {<\/font>
      arg(<\/font>0<\/font>)<\/font> =><\/font> lambda {<\/font> my<\/font>(<\/font>$n<\/font>)<\/font> =<\/font> @_<\/font>;<\/font> return<\/font> 0<\/font> }<\/font>,<\/font>
      arg(<\/font>1<\/font>)<\/font> =><\/font> lambda {<\/font> my<\/font>(<\/font>$n<\/font>)<\/font> =<\/font> @_<\/font>;<\/font> return<\/font> 1<\/font> }<\/font>,<\/font>
      arg(<\/font>n)<\/font> =><\/font> lambda {<\/font> my<\/font>(<\/font>$n<\/font>)<\/font> =<\/font> @_<\/font>;<\/font> return<\/font> fib(<\/font>$n<\/font>—<\/font>1<\/font>)<\/font> +<\/font> fib(<\/font>$n<\/font>—<\/font>2<\/font>)<\/font> }<\/font>,<\/font>
  }<\/font>;<\/font>
   
  print<\/font> fib(<\/font>1000<\/font>)<\/font>;<\/font><\/p><\/blockquote>\n
  \u0418\u0437 \u043f\u0440\u0438\u043c\u0435\u0440\u0430 \u0432\u0438\u0434\u043d\u043e, \u0447\u0442\u043e \u0443 \u043d\u0430\u0441 \u043f\u043e\u044f\u0432\u0438\u043b\u0438\u0441\u044c \u043d\u043e\u0432\u044b\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 recurrent, arg, n \u0438 lambda. \u041d\u0430 \u0441\u0430\u043c\u043e\u043c \u0434\u0435\u043b\u0435, \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u043f\u043e\u043b\u044c\u0437\u0430 \u0435\u0441\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u0443 recurrent, \u0432\u0441\u0435 \u043e\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u043d\u0443\u0436\u043d\u044b \u043b\u0438\u0448\u044c \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u0431\u043e\u043b\u0435\u0435 \u00ab\u043a\u0440\u0430\u0441\u0438\u0432\u043e\u0433\u043e\u00bb \u043a\u043e\u0434\u0430.<\/p>\n
  \u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u043d\u0430\u043f\u0438\u0448\u0435\u043c \u043c\u043e\u0434\u0443\u043b\u044c Recurrent.pm
  <\/a>  <\/p>\n
 package Recurrent; our $VERSION = '0.01'; use base qw(Exporter);  use strict; use Carp qw(croak);  our @EXPORT = qw(arg n lambda recurrent);  sub arg($)    { $_[0] } # \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u043f\u0435\u0440\u0432\u044b\u0439 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442 sub n         { ''    } # \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u043f\u0443\u0441\u0442\u0443\u044e \u0441\u0442\u0440\u043e\u043a\u0443 sub lambda(&) {         # alias \u0434\u043b\u044f sub { }      return shift; } sub recurrent($$) {      my($name, $mapping) = @_;     croak '$name should be a string'         if ref($name) ne '';     croak '$mapping should be a hash reference'         if ref($mapping) ne 'HASH';     croak 'no parametric function in recurrent relation'         if ref($mapping->{(n())}) ne 'CODE';     {         no strict 'refs';                  # \u0441\u043e\u0437\u0434\u0430\u0435\u043c \u043a\u0435\u0448 \u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u044e $name         my $mem = join('::', (caller())[0], "RECURRENT_CACHE_$name");         my $fun = join('::', (caller())[0], "$name");                  *{$mem} = {};         *{$fun} = sub {             my($_n, $_mapping) = ($_[0], $mapping);             croak "argument is required for $name(n)"                 if !defined $_n;                              # \u0438\u0449\u0435\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0432 \u043a\u0435\u0448\u0435, \u0435\u0441\u043b\u0438 \u043d\u0435\u0442 \u0442\u043e \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u043c             defined(${*{$mem}}->{$_n})                 ?  (${*{$mem}}->{$_n})                 :  (${*{$mem}}->{$_n} =                     defined($_mapping->{$_n})                         ?  ($_mapping->{$_n}->($_n))                         :  ($_mapping->{(n())}->($_n)));         };     } }  1; <\/pre>\n
  \u0422\u0435\u043f\u0435\u0440\u044c, \u043c\u043e\u0436\u043d\u043e \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0447\u0442\u043e-\u0442\u043e \u0432\u0440\u043e\u0434\u0435.  <\/p>\n
#!\/usr\/bin\/perl -I.\/lib<\/font>
  use strict;<\/font>
  use bigint;<\/font>
   
  use Recurrent;<\/font>
   
  recurrent fac =><\/font> {<\/font>
      arg(<\/font>0<\/font>)<\/font> =><\/font> lambda {<\/font> my(<\/font>$n)<\/font> =<\/font> @_;<\/font> return<\/font> 1<\/font> }<\/font>,
      arg(<\/font>n)<\/font> =><\/font> lambda {<\/font> my(<\/font>$n)<\/font> =<\/font> @_;<\/font> return<\/font> $n *<\/font> fac(<\/font>$n—<\/font>1<\/font>)<\/font> }<\/font>,
  }<\/font>;<\/font>
   
  print fac(<\/font>1000<\/font>)<\/font>;<\/font><\/p><\/blockquote>\n
      \t \t\t   \t<\/p>\n
<\/div>\n<\/p><\/div>\n
 \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438  http:\/\/habrahabr.ru\/post\/169469\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
   \t\u041f\u0440\u0438\u0432\u0435\u0442,
  \u0432 \u044d\u0442\u043e\u043c \u043f\u043e\u0441\u0442\u0435 \u044f \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0443 \u0440\u0435\u0446\u0435\u043f\u0442 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0432 \u041f\u0435\u0440\u043b.<\/p>\n
  \u041a\u0430\u043a \u0443\u0436\u0435 \u0441\u0442\u0430\u043b\u043e \u043f\u043e\u043d\u044f\u0442\u043d\u043e \u0438\u0437 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u044f, \u043c\u044b \u0431\u0443\u0434\u0435\u043c \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0442\u044c \u0440\u0435\u043a\u0443\u0440\u0440\u0435\u043d\u0442\u043d\u044b\u0435 \u0441\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u044f.
  \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0444\u043e\u0440\u043c\u0443\u043b\u044b \u0434\u043b\u044f \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f \u0444\u0430\u043a\u0442\u043e\u0440\u0438\u0430\u043b\u0430 \u0432\u044b\u0433\u043b\u044f\u0434\u044f\u0442 \u0432\u043e\u0442 \u0442\u0430\u043a:  <\/p>\n
 f(0) = 1 f(n) = n * f(n-1) <\/pre>\n
  \u0424\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u044f\u0437\u044b\u043a\u0438 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0442\u044c \u0442\u0430\u043a\u0438\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u043e, \u0432 Erlang \u044d\u0442\u043e \u0434\u0435\u043b\u0430\u0435\u0442\u0441\u044f \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c:  <\/p>\n
factorial(0) ->     1; factorial(N) ->     N * factorial(N-1).<\/pre>\n
  \u0410 \u0442\u0435\u043f\u0435\u0440\u044c \u043f\u043e\u043f\u0440\u043e\u0431\u0443\u0435\u043c \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435\u0447\u0442\u043e \u043f\u043e\u0445\u043e\u0436\u0435\u0435, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u043b\u043e \u0431\u044b \u043d\u0430\u043c \u043f\u0438\u0441\u0430\u0442\u044c \u043a\u043e\u0434 \u0432\u0438\u0434\u0430:  <\/p>\n
#!\/usr\/bin\/perl -I.\/lib<\/font>
  use<\/font> strict;<\/font>
  use<\/font> bigint;<\/font>
   
  use<\/font> Recurrent;<\/font>
   
  recurrent fib =><\/font> {<\/font>
      arg(<\/font>0<\/font>)<\/font> =><\/font> lambda {<\/font> my<\/font>(<\/font>$n<\/font>)<\/font> =<\/font> @_<\/font>;<\/font> return<\/font> 0<\/font> }<\/font>,<\/font>
      arg(<\/font>1<\/font>)<\/font> =><\/font> lambda {<\/font> my<\/font>(<\/font>$n<\/font>)<\/font> =<\/font> @_<\/font>;<\/font> return<\/font> 1<\/font> }<\/font>,<\/font>
      arg(<\/font>n)<\/font> =><\/font> lambda {<\/font> my<\/font>(<\/font>$n<\/font>)<\/font> =<\/font> @_<\/font>;<\/font> return<\/font> fib(<\/font>$n<\/font>—<\/font>1<\/font>)<\/font> +<\/font> fib(<\/font>$n<\/font>—<\/font>2<\/font>)<\/font> }<\/font>,<\/font>
  }<\/font>;<\/font>
   
  print<\/font> fib(<\/font>1000<\/font>)<\/font>;<\/font><\/p><\/blockquote>\n
  \u0418\u0437 \u043f\u0440\u0438\u043c\u0435\u0440\u0430 \u0432\u0438\u0434\u043d\u043e, \u0447\u0442\u043e \u0443 \u043d\u0430\u0441 \u043f\u043e\u044f\u0432\u0438\u043b\u0438\u0441\u044c \u043d\u043e\u0432\u044b\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 recurrent, arg, n \u0438 lambda. \u041d\u0430 \u0441\u0430\u043c\u043e\u043c \u0434\u0435\u043b\u0435, \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u043f\u043e\u043b\u044c\u0437\u0430 \u0435\u0441\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u0443 recurrent, \u0432\u0441\u0435 \u043e\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u043d\u0443\u0436\u043d\u044b \u043b\u0438\u0448\u044c \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u0431\u043e\u043b\u0435\u0435 \u00ab\u043a\u0440\u0430\u0441\u0438\u0432\u043e\u0433\u043e\u00bb \u043a\u043e\u0434\u0430.<\/p>\n
  \u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u043d\u0430\u043f\u0438\u0448\u0435\u043c \u043c\u043e\u0434\u0443\u043b\u044c Recurrent.pm  <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-169469","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/169469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=169469"}],"version-history":[{"count":0,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/169469\/revisions"}],"wp:attachment":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=169469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=169469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=169469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}