1Hash::AutoHash::Args::VU0s(e3r)Contributed Perl DocumentHaatsiho:n:AutoHash::Args::V0(3)
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6 Hash::AutoHash::Args::V0 - Object-oriented processing of argument lists
7 (version 0)
8
10 Version 1.18
11
13 use Hash::AutoHash::Args::V0;
14 my $args=new Hash::AutoHash::Args::V0(name=>'Joe',
15 HOBBIES=>'hiking',hobbies=>'cooking');
16 # access argument values as HASH elements
18 my $name=$args->{name};
19 my $hobbies=$args->{hobbies};
20 # access argument values via methods
22 my $name=$args->name;
23 my $hobbies=$args->hobbies;
24 # set local variables from argument values -- three equivalent ways
26 use Hash::AutoHash::Args qw(autoargs_get);
27 my($name,$hobbies)=@$args{qw(name hobbies)};
28 my($name,$hobbies)=autoargs_get($args,qw(name hobbies));
29 my($name,$hobbies)=$args->get_args(qw(name hobbies)));
30 # copy args into local hash
32 my %args=$args->getall_args
33 # alias $args to regular hash for more concise hash notation
35 use Hash::AutoHash::Args qw(autoargs_alias);
36 autoargs_alias($args,%args);
37 my($name,$hobbies)=@args{qw(name hobbies)}; # get argument values
38 $args{name}='Joseph'; # set argument value
39
41 This class simplifies the handling of keyword argument lists. It
42 replaces Class::AutoClass::Args. It is a subclass of
43 Hash::AutoHash::Args providing almost complete compatibility with
44 Class::AutoClass::Arg. We recommend that you use Hash::AutoHash::Args
45 instead of this class unless you need compatibility with
46 Class::AutoClass::Args.
47 This class is identical to Hash::AutoHash::Args except as follows.
49 Please refer to Hash::AutoHash::Args for the main documentation.
50 Unlike Hash::AutoHash::Args, this class defines several methods and
52 functions in its own namespace.
53 get_args, getall_args, set_args, fix_args, _fix_args, fix_keyword,
55 fix_keywords, is_keyword, is_positional
56 A consequence of these being defined in the class's namespace is that
58 they "mask" keywords of the same name and prevent those keywords from
59 being accessed using method notation. In Hash::AutoHash::Args, these
60 are provided as functions that can be imported in the caller's
61 namespace which avoids the masking problem.
62 get_args, getall_args, and set_args are methods that can be invoked on
64 Hash::AutoHash::Args::V0 objects. Descriptions of these methods are
65 below. The others are functions and operate the same way here as in
66 Hash::AutoHash::Args except that they do not need to be imported before
67 use.
68 Title : get_args
70 Usage : ($name,$hobbies)=$args->get_args(qw(-name hobbies))
71 Function: Get values for multiple keywords
72 Args : array or ARRAY of keywords
73 Returns : array or ARRAY of argument values
74 Note : provided in Hash::AutoHash::Args as importable function
75 Title : getall_args
77 Usage : %args=$args->getall_args;
78 Function: Get all keyword, value pairs
79 Args : none
80 Returns : hash or HASH of key=>value pairs.
81 Note : provided in Hash::AutoHash::Args as importable function
82 Title : set_args
84 Usage : $args->set_args
85 (name=>'Joe the Plumber',-first_name=>'Joe',-last_name=>'Plumber')
86 Function: Set multiple arguments in existing object
87 Args : parameter list in same format as for 'new'
88 Returns : nothing
89 Note : provided in Hash::AutoHash::Args as importable function
90
92 This class differs from its precursor, Class::AutoClass::Args, only in
93 a bug fix involving get_args in scalar context.
94 In scalar context, get_args is supposed to return an ARRAY of argument
96 values. Instead, in Class::AutoClass::Args, it returned the value of
97 the first argument.
98 my $values=$args->get_args(qw(name hobbies)); # old bug: gets value of 'name'
100 The bug has been fixed and it now returns an ARRAY of the requested
102 argument values.
103 my $values=get_args($args,qw(name hobbies)); # now: gets ARRAY of both values
105
107 Hash::AutoHash::Args is the base class of this one.
108 Class::AutoClass::Args is replaced by this class.
109 Hash::AutoHash provides the object wrapper used by this class.
111 Hash::AutoHash::MultiValued, Hash::AutoHash::AVPairsSingle,
112 Hash::AutoHash::AVPairsMulti, Hash::AutoHash::Record are other
113 subclasses of Hash::AutoHash.
114 perltie and Tie::Hash present background on tied hashes.
116
118 Nat Goodman, "<natg at shore.net>"
119
121 CPAN reports that "Make test fails under Perl 5.6.2, FreeBSD 5.2.1."
122 for the predecessor to this class, Class::AutoClass::Args. We are not
123 aware of any bugs in this class.
124 Bugs, Caveats, and ToDos
126 See caveats about accessing arguments via method notation.
127
129 You can find documentation for this module with the perldoc command.
130 perldoc Hash::AutoHash::Args::V0
132 You can also look for information at:
134 · RT: CPAN's request tracker
136 <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Hash-AutoHash-Args-V0>
138 · AnnoCPAN: Annotated CPAN documentation
140 <http://annocpan.org/dist/Hash-AutoHash-Args-V0>
142 · CPAN Ratings
144 <http://cpanratings.perl.org/d/Hash-AutoHash-Args-V0>
146 · Search CPAN
148 <http://search.cpan.org/dist/Hash-AutoHash-Args-V0/>
150
152 Copyright (c) 2008, 2009 Institute for Systems Biology (ISB). All
153 Rights Reserved.
154 This program is free software; you can redistribute it and/or modify it
156 under the terms of either: the GNU General Public License as published
157 by the Free Software Foundation; or the Artistic License.
158 See http://dev.perl.org/licenses/ for more information.
160perl v5.30.1 2020-01-30 Hash::AutoHash::Args::V0(3)