Hash
AUTHOR
jan molic /mig/at/1984/dot/cz/
DESCRIPTION
Hash with preserved order and some array-like extensions Public domain.
THANKS
Andrew Johnson for his suggestions and fixes of Hash[], merge, to_a, inspect and shift
# File lib/storable/orderedhash.rb, line 15 def [] *args hsh = Storable::OrderedHash.new if Hash === args[0] hsh.replace args[0] elsif (args.size % 2) != 0 raise ArgumentError, "odd number of elements for Hash" else 0.step(args.size - 1, 2) do |a| b = a + 1 hsh[args[a]] = args[b] end end hsh end
# File lib/storable/orderedhash.rb, line 43 def == hsh2 return false if @order != hsh2.order super hsh2 end
# File lib/storable/orderedhash.rb, line 161 def __class__ Storable::OrderedHash end
# File lib/storable/orderedhash.rb, line 47 def clear @order = [] super end
# File lib/storable/orderedhash.rb, line 51 def delete key @order.delete key super end
# File lib/storable/orderedhash.rb, line 68 def delete_if @order.clone.each { |k| delete k if yield(k) } self end
# File lib/storable/orderedhash.rb, line 63 def each @order.each { |k| yield k,self[k] } self end
# File lib/storable/orderedhash.rb, line 55 def each_key @order.each { |k| yield k } self end
# File lib/storable/orderedhash.rb, line 59 def each_value @order.each { |k| yield self[k] } self end
# File lib/storable/orderedhash.rb, line 193 def each_with_index @order.each_with_index { |k, index| yield k, self[k], index } self end
# File lib/storable/orderedhash.rb, line 82 def first {@order.first => self[@order.first]} end
# File lib/storable/orderedhash.rb, line 138 def inspect ary = [] each {|k,v| ary << k.inspect + "=>" + v.inspect} '{' + ary.join(", ") + '}' end
# File lib/storable/orderedhash.rb, line 88 def invert hsh2 = Hash.new @order.each { |k| hsh2[self[k]] = k } hsh2 end
# File lib/storable/orderedhash.rb, line 85 def last {@order.last => self[@order.last]} end
# File lib/storable/orderedhash.rb, line 148 def merge hsh2 ##self.dup update(hsh2) ## 2009-05-12 -- delano update hsh2 ## dup doesn't take an argument ## and there's no need for it here end
# File lib/storable/orderedhash.rb, line 126 def pop key = @order.last key ? [key,delete(key)] : nil end
# File lib/storable/orderedhash.rb, line 117 def push k,v unless self.include? k @order.push k orig_store(k,v) true else false end end
# File lib/storable/orderedhash.rb, line 93 def reject &block self.dup.delete_if( &block) end
# File lib/storable/orderedhash.rb, line 96 def reject! &block hsh2 = reject( &block) self == hsh2 ? nil : hsh2 end
# File lib/storable/orderedhash.rb, line 100 def replace hsh2 @order = hsh2.keys super hsh2 end
# File lib/storable/orderedhash.rb, line 153 def select ary = [] each { |k,v| ary << [k,v] if yield k,v } ary end
# File lib/storable/orderedhash.rb, line 104 def shift key = @order.first key ? [key,delete(key)] : super end
# File lib/storable/orderedhash.rb, line 38 def store a,b @order.push a unless has_key? a super a,b end
# File lib/storable/orderedhash.rb, line 34 def store_only a,b store a,b end
# File lib/storable/orderedhash.rb, line 130 def to_a ary = [] each { |k,v| ary << [k,v] } ary end
# File lib/storable/orderedhash.rb, line 135 def to_s self.to_a.to_s end
# File lib/storable/orderedhash.rb, line 108 def unshift k,v unless self.include? k @order.unshift k orig_store(k,v) true else false end end
# File lib/storable/orderedhash.rb, line 143 def update hsh2 hsh2.each { |k,v| self[k] = v } self end
# File lib/storable/orderedhash.rb, line 74 def values ary = [] @order.each { |k| ary.push self[k] } ary end
# File lib/storable/orderedhash.rb, line 191 def yaml_inline!() self.yaml_inline = true end
# File lib/storable/orderedhash.rb, line 166 def yaml_inline= bool if respond_to?("to_yaml_style") self.to_yaml_style = :inline else unless defined? @__yaml_inline_meth @__yaml_inline_meth = lambda {|opts| YAML::quick_emit(object_id, opts) {|emitter| emitter << '{ ' << map{|kv| kv.join ': '}.join(', ') << ' }' } } class << self def to_yaml opts = {} begin @__yaml_inline ? @__yaml_inline_meth[ opts ] : super rescue @to_yaml_style = :inline super end end end end end @__yaml_inline = bool end
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