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[18425] | 1 | require 'yaml'
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| 2 | require 'dbm'
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| 3 | #
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| 4 | # YAML + DBM = YDBM
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| 5 | # - Same interface as DBM class
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| 6 | #
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| 7 | module YAML
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| 8 |
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| 9 | class DBM < ::DBM
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| 10 | VERSION = "0.1"
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| 11 | def []( key )
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| 12 | fetch( key )
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| 13 | end
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| 14 | def []=( key, val )
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| 15 | store( key, val )
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| 16 | end
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| 17 | def fetch( keystr, ifnone = nil )
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| 18 | begin
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| 19 | val = super( keystr )
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| 20 | return YAML::load( val ) if String === val
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| 21 | rescue IndexError
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| 22 | end
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| 23 | if block_given?
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| 24 | yield keystr
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| 25 | else
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| 26 | ifnone
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| 27 | end
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| 28 | end
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| 29 | def index( keystr )
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| 30 | super( keystr.to_yaml )
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| 31 | end
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| 32 | def values_at( *keys )
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| 33 | keys.collect { |k| fetch( k ) }
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| 34 | end
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| 35 | def delete( key )
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| 36 | v = super( key )
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| 37 | if String === v
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| 38 | v = YAML::load( v )
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| 39 | end
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| 40 | v
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| 41 | end
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| 42 | def delete_if
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| 43 | del_keys = keys.dup
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| 44 | del_keys.delete_if { |k| yield( k, fetch( k ) ) == false }
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| 45 | del_keys.each { |k| delete( k ) }
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| 46 | self
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| 47 | end
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| 48 | def reject
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| 49 | hsh = self.to_hash
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| 50 | hsh.reject { |k,v| yield k, v }
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| 51 | end
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| 52 | def each_pair
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| 53 | keys.each { |k| yield k, fetch( k ) }
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| 54 | self
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| 55 | end
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| 56 | def each_value
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| 57 | super { |v| yield YAML::load( v ) }
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| 58 | self
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| 59 | end
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| 60 | def values
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| 61 | super.collect { |v| YAML::load( v ) }
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| 62 | end
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| 63 | def has_value?( val )
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| 64 | each_value { |v| return true if v == val }
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| 65 | return false
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| 66 | end
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| 67 | def invert
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| 68 | h = {}
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| 69 | keys.each { |k| h[ self.fetch( k ) ] = k }
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| 70 | h
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| 71 | end
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| 72 | def replace( hsh )
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| 73 | clear
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| 74 | update( hsh )
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| 75 | end
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| 76 | def shift
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| 77 | a = super
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| 78 | a[1] = YAML::load( a[1] ) if a
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| 79 | a
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| 80 | end
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| 81 | def select( *keys )
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| 82 | if block_given?
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| 83 | self.keys.collect { |k| v = self[k]; [k, v] if yield k, v }.compact
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| 84 | else
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| 85 | values_at( *keys )
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| 86 | end
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| 87 | end
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| 88 | def store( key, val )
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| 89 | super( key, val.to_yaml )
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| 90 | val
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| 91 | end
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| 92 | def update( hsh )
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| 93 | hsh.keys.each do |k|
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| 94 | self.store( k, hsh.fetch( k ) )
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| 95 | end
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| 96 | self
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| 97 | end
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| 98 | def to_a
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| 99 | a = []
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| 100 | keys.each { |k| a.push [ k, self.fetch( k ) ] }
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| 101 | a
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| 102 | end
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| 103 | def to_hash
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| 104 | h = {}
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| 105 | keys.each { |k| h[ k ] = self.fetch( k ) }
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| 106 | h
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| 107 | end
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| 108 | alias :each :each_pair
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| 109 | end
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| 110 |
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| 111 | end
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