鐃緒申鐃緒申鐃叔わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃重削申鐃塾誌申鐃瞬でわ申鐃緒申

cover
Perl Best Practices
 Damian Conway

鐃緒申鐃緒申蓮鐃� Kazuho@Cybozu Labs: Lingua::JA::Summarize 0.02鐃叔わ申鐃緒申

鐃殉わ申鐃熟￥申Editor鐃叔鰹申鐃緒申鐃銃みなわ申鐃夙醐申鐃重らい鐃夙わ申鐃緒申鐃緒申

鐃緒申鐃緒申妊鐃夙わ申tab("\t" ; "\x09")鐃緒申箸鐃緒申里呂鐃緒申泙鐃緒申腓�鐃緒申tab鐃緒申必鐃緒申space("\x20")鐃祝鰹申張鐃緒申鐃殉わ申鐃順う鐃緒申

鐃緒申鐃瞬ワ申鐃夙ップの随申鐃熟￥申鐃縦駈申鐃祝わ申辰動曚覆鐃殉わ申鐃緒申鐃祝わ申悗鐃初ず鐃純う鐃処う鐃緒申表鐃緒申鐃緒申鐃緒申鐃塾はわ申鐃緒申鐃淑わ申鐃緒申个覆鐃殉わ申鐃緒申perl鐃叔はわ申鐃緒申鐃緒申鐃縮薪�鐃叔はわ申鐃緒申泙鐃緒申鵑�￥申python鐃緒申haskell鐃叔わ申鐃緒申命的鐃叔わ申鐃緒申鐃緒申Perl鐃緒申鐃緒申鐃叔わ申鐃緒申YAML鐃淑どわ申颪い討鐃緒申鐃緒申鐃緒申呂鐃緒申鐃縮薪�鐃祝なわ申泙鐃緒申鐃�

鐃緒申鐃盾タ鐃瞬「ワ申鐃緒申鐃竣わ申箸鐃緒申覆箸鐃緒申鐃緒申里任呂覆鐃緒申里任鐃緒申鐃緒申鐃緒申鐃塾ワ申鐃叔ワ申鐃緒申鐃叔は￥申鐃緒申鐃瞬ワ申鐃緒申鐃薯押わ申鐃夙￥申適鐃准な随申鐃塾ワ申鐃准￥申鐃緒申鐃緒申鐃緒申鐃緒申討鐃緒申鐃緒申茲�鐃緒申鐃緒申鐃緒申任鐃緒申泙鐃�(Emacs鐃緒申cperl-mode鐃熟わ申鐃曙が標鐃緒申鐃緒申辰鐃緒申隼廚鐃�)鐃緒申鐃緒申鐃緒申鐃緒申鐃銃わ申鐃殉わ申鐃出わ申鐃緒申鐃塾でわ申鐃緒申

鐃緒申鐃祝書いわ申鐃塾は￥申perltidy鐃叔一気鐃緒申直鐃緒申鐃銃わ申鐃殉わ申鐃出わ申鐃緒申鐃叔わ申鐃順う鐃緒申

鐃緒申鐃祝￥申accessor鐃塾使わ申鐃緒申鐃緒申accessor鐃緒申箸鐃緒申鐃順、必鐃緒申accessor鐃緒申由鐃祝わ申鐃殉わ申鐃順う鐃緒申鐃殉鰹申

10: use base qw(Exporter Class::Accessor::Fast Class::ErrorHandler);
18: __PACKAGE__->mk_accessors(qw(mecab default_cost ng omit_number singlechar_factor alnum_as_word url_as_word jaascii_as_word));

鐃夙わ申鐃淑わ申鐃初、

32: sub new {
33:     my ($proto, $fields) = @_;
34:     my $class = ref $proto || $proto;
35:     $fields = {} unless defined $fields;
36:     my $self = bless { %$fields }, $class;
37:     
38:     $self->{mecab} = 'mecab' unless $self->{mecab};
39:     $self->{default_cost} = 800 unless $self->{default_cost};
40:     $self->{ng} = NG unless defined $self->{ng};
41:     $self->{omit_number} = 1 unless defined $self->{omit_number};
42:     $self->{singlechar_factor} = 0.5 unless defined $self->{singlechar_factor};
43:     $self->{alnum_as_word} = 1 unless defined $self->{alnum_as_word};
44:     $self->{url_as_word} = 1 unless defined $self->{url_as_word};
45:     $self->{jaascii_as_word} = 1 unless defined $self->{jaascii_as_word};
46:     
47:     return $self;
48: }

鐃叔わ申鐃緒申無鐃緒申鐃叔わ申鐃緒申

鐃殉わ申鐃緒申鐃殉鰹申Hash鐃緒申箸辰討鐃緒申鐃塾でわ申鐃緒申鐃初、鐃緒申鐃緒申鐃緒申鐃緒申箸鐃緒申辰箸鐃緒申譴わ申砲覆鐃殉わ申鐃緒申

my %Fields = 
    (
     mecab             => 'mecab',
     default_cost      => 800,
     ng                => NG(),
     omit_number       => 1,
     singlechar_factor => 0.5,
     alnum_as_word     => 1,
     url_as_word       => 1,
     jaascii_as_word,  => 1,
    );

__PACKAGE__->mk_accessors(keys %Fields);

sub new {
    my ($proto, $fields) = @_;
    my $class = ref $proto || $proto;
    return bless { %Fields, %$fields }, $class;
}

鐃緒申鐃緒申鐃瞬わ申鐃�DRY (Don't Repeat Yourself)鐃祝なわ申泙鐃緒申鐃緒申諭鐃�

鐃緒申鐃緒申鐃叔わ申new鐃熟￥申perl鐃緒申鐃緒申鐃緒申鐃緒申茲�鐃緒申鐃緒申鐃緒申里砲覆鐃殉わ申鐃緒申鐃瞬なわ申任鐃緒申譴�動鐃緒申鐃緒申?鐃竣とわか鐃緒申覆鐃緒申鐃緒申蓮鐃緒申焚鐃緒申鐃�code鐃緒申遒件申討澆堂鐃緒申鐃緒申鐃緒申鐃�

use Data::Dumper;
my %Default = ( Kazuho => 'Cybozu', Naoya => 'Hatena' );
print Dumper(\%Default);
my $args   = { Naoya => 'Hamachi' };
my $result = { %Default, %$args };
print Dumper($result);

鐃淑んか緒申鐃舜わ申鐃出わ申鐃緒申粉鐃緒申鐃緒申鐃緒申鐃緒申泙鐃緒申諭鐃緒申鐃緒申蓮鐃�@hash{@keys} = @value鐃祝つわ申鐃銃￥申鐃緒申鐃緒申呂錣�鐃緒申砲鐃緒申鐃緒申覆鐃塾で￥申鐃緒申鐃緒申鐃緒申必鐃竣な誌申鐃淑鰹申鐃熟わ申鐃夙わ申鐃殉わ申鐃順う鐃緒申

21: sub NG () {
22:     my %map;
23:     @map{('(', ')', '#', ',')} = ();
24:     @map{qw(! " $ % & ' * + - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~)} = ();
25:     @map{
26:     qw(鐃緒申 鐃緒申 分 鐃緒申 鐃緒申 鐃緒申 年 鐃緒申 鐃宿ワ申
27:        鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 六 鐃緒申 八 鐃緒申 鐃緒申 百 鐃緒申 鐃緒申 鐃緒申 鐃緒申)} = ();
28:     @map{qw(鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申)} = ();
29:     \%map;
30: }

鐃緒申鐃緒申覆鐃緒申箸鐃緒申覆鐃緒申討癲�

sub NG () {
    my %map =
        map { $_ => 1 }
            (
             '(', ')', '#', ',',
             qw( ! " $ % & ' * + - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~
                 鐃緒申 鐃緒申 分 鐃緒申 鐃緒申 鐃緒申 年 鐃緒申 鐃宿ワ申
                 鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 六 鐃緒申 八 鐃緒申 鐃緒申 百 鐃緒申 鐃緒申 鐃緒申 鐃緒申
                鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 ),
             );
    return \%map;
}

鐃叔わ申鐃緒申鐃塾でわ申鐃緒申鐃緒申鐃緒申鐃盾、鐃緒申鐃緒申鐃緒申鐃循どわ申%Fields鐃塾逸申鐃緒申鐃叔わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申覆里任鐃緒申鐃緒申蕁�

my %NG =
    map { $_ => 1 }
        (
         '(', ')', '#', ',',
         qw( ! " $ % & ' * + - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~
             鐃緒申 鐃緒申 分 鐃緒申 鐃緒申 鐃緒申 年 鐃緒申 鐃宿ワ申
             鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 六 鐃緒申 八 鐃緒申 鐃緒申 百 鐃緒申 鐃緒申 鐃緒申 鐃緒申
            鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 鐃緒申 ),
         );
my %Fields = 
    (
     mecab             => 'mecab',
     default_cost      => 800,
     ng                => \%NG,
     omit_number       => 1,
     singlechar_factor => 0.5,
     alnum_as_word     => 1,
     url_as_word       => 1,
     jaascii_as_word   => 1,
    );

鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾でわ申鐃緒申

鐃緒申鐃祝￥申open鐃塾使わ申鐃緒申鐃緒申

70: sub analyze_file {
71:     my ($self, $file) = @_;
72:     
73:     my $fh;
74:     open($fh, '<', "$file") || croak("failed to open: $file: $!");
75:     my $slash = $/;
76:     undef $/;
77:     my $text = <$fh>;
78:     $/ = $slash;
79:     close $fh;
80:     
81:     $self->analyze($text);
82: }

open() || die鐃叔はなわ申鐃緒申open ... or die鐃祝わ申鐃殉わ申鐃順う鐃緒申鐃緒申鐃夙￥申perl鐃祝わ申local()鐃緒申鐃緒申鐃暑こ鐃夙わ申个鐃緒申討鐃緒申鐃緒申泙鐃緒申腓�鐃緒申

sub analyze_file {
    my ($self, $file) = @_;
    open my $fh, '<:raw' $file or croak "failed to open: $file: $!";
    my $text = do{ local $/; <$fh> }; # Perl Best Practices pp.213
    close $fh;
    $self->analyze($text);
}

鐃緒申鐃緒申鐃�Damian鐃緒申鐃緒申鐃緒申Perl6::Slurp鐃祝わ申鐃塾わ申鐃緒申鐃緒申離鐃緒申鐃淑とわ申鐃緒申鐃薯押わ申鐃春わ申鐃緒申鐃純う鐃夙わ申鐃緒申鐃塾もぐ鐃緒申鐃叔わ申鐃緒申

鐃縦わ申鐃祝￥申mecab鐃緒申討喀个鐃緒申箸鐃緒申鐃緒申任鐃緒申鐃�

84: sub analyze {
        # ....
97:     # write text to temporary file
98:     my ($fh, $tempfile) = tmpnam();
99:     print $fh $text;
100:    close $fh;
101:     
102:    # open mecab
103:    my $mecab = $self->mecab;
104:    my $def_cost = $self->default_cost;
105:    open($fh, '-|',
106:    $mecab .
107:    " --node-format='%m\t%pn\t%pw\t%H\n'" .
108:    " --unk-format='%m\t$def_cost\t$def_cost\tUnkType\n'" .
109:    " --bos-format='\n'" .
110:    " --eos-format='\n'" .
111:    " $tempfile")
112:    || croak("failed to call mecab ($mecab): $!");

鐃緒申鐃緒申鐃出￥申IPC::Open2()鐃緒申箸辰董鐃緒申鐃緒申鐃春ワ申鐃緒申鐃緒申鐃夙わ申覆鐃緒申箸鐃緒申鐃緒申里鐃緒申鐃緒申鐃緒申鐃緒申里任鐃緒申鐃緒申鐃緒申鐃緒申鐃熟テワ申鐃祝ッワ申鐃夙わ申鐃銃は刻申鐃駿なので￥申鐃緒申鐃緒申覆鐃緒申鐃緒申鐃緒申楼鐃緒申鐃春ワ申鐃緒申鐃緒申鐃夙ってもい鐃緒申鐃叔わ申鐃順う鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申open鐃熟わ申鐃緒申鐃緒申鐃緒申鐃淑わ申鐃緒申鐃緒申由鐃緒申perldoc perlsec鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃淑駕申鐃塾よう鐃祝わ申鐃駿わ申鐃叔わ申鐃緒申

  local(%ENV);
  $ENV{PATH} = '/usr/local/bin:/usr/bin:/bin';
  delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};
  open $fh, '-|'
    or exec {$mecab}, 
         "--node-format='%m\t%pn\t%pw\t%H\n'",
         "--unk-format='%m\t$def_cost\t$def_cost\tUnkType\n'",
         "--bos-format='\n'",
         "--eos-format='\n'",
         $tempfile 
    or croak "failed to call mecab ($mecab): $!";
cover
Perl Cookbook (English)
 鐃緒申鐃旬醐申鐃緒申

鐃緒申鐃緒申鐃峻のとわ申鐃緒申鐃熟￥申Perl Cookbook鐃緒申鐃緒申鐃緒申鐃緒申鐃叔の削申鐃宿の緒申任鐃緒申腓�鐃緒申鐃緒申鐃旬醐申鐃叔は誌申鐃銃緒申鐃緒申鐃緒申鐃緒申辰討泙鐃緒申鐃�

鐃緒申鐃夙￥申鐃緒申鐃叔わ申 Perl 5.8 鐃緒申鐃出わ申鐃塾でわ申鐃緒申鐃初、Literal鐃緒申UTF-8鐃叔書いわ申鐃緒申鐃緒申better practice鐃叔はわ申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申圓呂泙鐃緒申離鐃緒申魯鐃緒申鐃渋随申鐃緒申鐃緒申任鐃緒申鐃銃わ申鐃緒申箸呂鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申里任鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申弔鐃緒申鐃宿�鐃緒申鐃緒申鬚い鐃緒申鐃緒申鐃緒申討鐃緒申鐃塾で￥申鐃緒申年鐃緒申砲禄鐃緒申劼覆鐃緒申鐃緒申鐃緒申鐃塾件申鐃叔わ申鐃夙どわ申鐃緒申鐃緒申鐃叔わ申鐃順う鐃緒申鐃緒申鐃緒申鐃緒申鵑海鐃緒申砲鐃緒申鼻鐃緒申颪い討鐃緒申鐃緒申泙鐃緒申鐃�

鐃緒申鐃緒申任鐃緒申鐃緒申鐃緒申呂鐃緒申鐃緒申佞如鐃�

Dan the Best Practitioner