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# Math::String::Charset 1.27

Date Added: September 23, 2010  |  Visits: 707

Math::String::Charset is a simple charset for Math::String objects. SYNOPSIS use Math::String::Charset; \$a = new Math::String::Charset; # default a-z \$b = new Math::String::Charset [a..z]; # same \$c = new Math::String::Charset { start => [a..z], sep => }; # with between chars print \$b->length(); # a-z => 26 # construct a charset from bigram table, and an initial set (containing # valid start-characters) # Note: After an a, either an b, c or a can follow, in this order # After an d only an a can follow \$bi = new Math::String::Charset ( { start => a..d, bi => { a => [ b, c, a ], b => [ c, b ], c => [ a, c ], d => [ a, ], q => [ ], # q will be automatically in end } end => [ a, b, ], } ); print \$bi->length(); # a,b => 2 (cross of end and start) print scalar \$bi->class(2); # count of combinations with 2 letters # will be 3+2+2+1 => 8 \$d = new Math::String::Charset ( { start => [a..z], minlen => 2, maxlen => 4, } ); print \$d->first(0),"n"; # undef, too short print \$d->first(1),"n"; # undef, to short print \$d->first(2),"n"; # aa \$d = new Math::String::Charset ( { start => [a..z] } ); print \$d->first(0),"n"; # print \$d->first(1),"n"; # a print \$d->last(1),"n"; # z print \$d->first(2),"n"; # aa This module lets you create an charset object, which is used to contruct Math::String objects. This object knows how to handle simple charsets as well as complex onex consisting of bi-grams (later tri and more). In case of more complex charsets, a reference to a Math::String::Charset::Nested or Math::String::Charset::grouped will be returned. The default charset is the set containing "abcdefghijklmnopqrstuvwxyz" (thus producing always lower case output)..

 Requirements: No special requirements Platforms: Linux Keyword: Charset,  D-,  Libraries,  Mathstringcharset,  New,  Print,  Programming Users rating: 0/10