/usr/lib/ruby/1.8/extlib/mash.rb is in libextlib-ruby1.8 0.9.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | # This class has dubious semantics and we only have it so that people can write
# params[:key] instead of params['key'].
class Mash < Hash
# @param constructor<Object>
# The default value for the mash. Defaults to an empty hash.
#
# @details [Alternatives]
# If constructor is a Hash, a new mash will be created based on the keys of
# the hash and no default value will be set.
def initialize(constructor = {})
if constructor.is_a?(Hash)
super()
update(constructor)
else
super(constructor)
end
end
# @param key<Object> The default value for the mash. Defaults to nil.
#
# @details [Alternatives]
# If key is a Symbol and it is a key in the mash, then the default value will
# be set to the value matching the key.
def default(key = nil)
if key.is_a?(Symbol) && include?(key = key.to_s)
self[key]
else
super
end
end
alias_method :regular_writer, :[]= unless method_defined?(:regular_writer)
alias_method :regular_update, :update unless method_defined?(:regular_update)
# @param key<Object> The key to set.
# @param value<Object>
# The value to set the key to.
#
# @see Mash#convert_key
# @see Mash#convert_value
def []=(key, value)
regular_writer(convert_key(key), convert_value(value))
end
# @param other_hash<Hash>
# A hash to update values in the mash with. The keys and the values will be
# converted to Mash format.
#
# @return <Mash> The updated mash.
def update(other_hash)
other_hash.each_pair { |key, value| regular_writer(convert_key(key), convert_value(value)) }
self
end
alias_method :merge!, :update
# @param key<Object> The key to check for. This will be run through convert_key.
#
# @return <TrueClass, FalseClass> True if the key exists in the mash.
def key?(key)
super(convert_key(key))
end
# def include? def has_key? def member?
alias_method :include?, :key?
alias_method :has_key?, :key?
alias_method :member?, :key?
# @param key<Object> The key to fetch. This will be run through convert_key.
# @param *extras<Array> Default value.
#
# @return <Object> The value at key or the default value.
def fetch(key, *extras)
super(convert_key(key), *extras)
end
# @param *indices<Array>
# The keys to retrieve values for. These will be run through +convert_key+.
#
# @return <Array> The values at each of the provided keys
def values_at(*indices)
indices.collect {|key| self[convert_key(key)]}
end
# @param hash<Hash> The hash to merge with the mash.
#
# @return <Mash> A new mash with the hash values merged in.
def merge(hash)
self.dup.update(hash)
end
# @param key<Object>
# The key to delete from the mash.\
def delete(key)
super(convert_key(key))
end
# @param *rejected<Array[(String, Symbol)] The mash keys to exclude.
#
# @return <Mash> A new mash without the selected keys.
#
# @example
# { :one => 1, :two => 2, :three => 3 }.except(:one)
# #=> { "two" => 2, "three" => 3 }
def except(*keys)
super(*keys.map {|k| convert_key(k)})
end
# Used to provide the same interface as Hash.
#
# @return <Mash> This mash unchanged.
def stringify_keys!; self end
# @return <Hash> The mash as a Hash with symbolized keys.
def symbolize_keys
h = Hash.new(default)
each { |key, val| h[key.to_sym] = val }
h
end
# @return <Hash> The mash as a Hash with string keys.
def to_hash
Hash.new(default).merge(self)
end
protected
# @param key<Object> The key to convert.
#
# @param <Object>
# The converted key. If the key was a symbol, it will be converted to a
# string.
#
# @api private
def convert_key(key)
key.kind_of?(Symbol) ? key.to_s : key
end
# @param value<Object> The value to convert.
#
# @return <Object>
# The converted value. A Hash or an Array of hashes, will be converted to
# their Mash equivalents.
#
# @api private
def convert_value(value)
if value.class == Hash
value.to_mash
elsif value.is_a?(Array)
value.collect { |e| convert_value(e) }
else
value
end
end
end
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