Class: Ardm::Mash

Inherits:
Hash
  • Object
show all
Defined in:
lib/ardm/support/mash.rb

Overview

This class has dubious semantics and we only have it so that people can write params instead of params.

Instance Method Summary collapse

Constructor Details

#initialize(constructor = {}) ⇒ Mash

Initializes a new mash.



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# File 'lib/ardm/support/mash.rb', line 12

def initialize(constructor = {})
  if constructor.is_a?(Hash)
    super()
    update(constructor)
  else
    super(constructor)
  end
end

Instance Method Details

#[]=(key, value) ⇒ Object

Sets the value associated with the specified key.



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# File 'lib/ardm/support/mash.rb', line 42

def []=(key, value)
  regular_writer(convert_key(key), convert_value(value))
end

#default(key = nil) ⇒ Object

Gets the default value for the mash.



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# File 'lib/ardm/support/mash.rb', line 27

def default(key = nil)
  if key.is_a?(Symbol) && include?(key = key.to_s)
    self[key]
  else
    super
  end
end

#delete(key) ⇒ Object 



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# File 'lib/ardm/support/mash.rb', line 96

def delete(key)
  super(convert_key(key))
end

#except(*keys) ⇒ Mash

Returns a mash that includes everything but the given keys.

Examples:

{ :one => 1, :two => 2, :three => 3 }.except(:one)
  #=> { "two" => 2, "three" => 3 }



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# File 'lib/ardm/support/mash.rb', line 109

def except(*keys)
  self.dup.except!(*keys.map {|k| convert_key(k)})
end

#except!(*keys) ⇒ Hash

Removes the specified keys from the mash.

Examples:

mash = { :one => 1, :two => 2, :three => 3 }
mash.except!(:one, :two)
mash # => { :three => 3 }



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# File 'lib/ardm/support/mash.rb', line 123

def except!(*keys)
  keys.each { |key| delete(key) }
  self
end

#fetch(key, *extras) ⇒ Object 



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# File 'lib/ardm/support/mash.rb', line 76

def fetch(key, *extras)
  super(convert_key(key), *extras)
end

#key?(key) ⇒ Boolean Also known as: include?, has_key?, member?

Determines whether the mash contains the specified key.



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# File 'lib/ardm/support/mash.rb', line 64

def key?(key)
  super(convert_key(key))
end

#merge(hash) ⇒ Mash 



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# File 'lib/ardm/support/mash.rb', line 91

def merge(hash)
  self.dup.update(hash)
end

#regular_update ⇒ Object 



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# File 'lib/ardm/support/mash.rb', line 36

alias_method :regular_update, :update

#regular_writer ⇒ Object 



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# File 'lib/ardm/support/mash.rb', line 35

alias_method :regular_writer, :[]=

#stringify_keys! ⇒ Mash

Used to provide the same interface as Hash.



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# File 'lib/ardm/support/mash.rb', line 131

def stringify_keys!; self end

#symbolize_keys ⇒ Hash 



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# File 'lib/ardm/support/mash.rb', line 134

def symbolize_keys
  h = Hash.new(default)
  each { |key, val| h[key.to_sym] = val }
  h
end

#to_hash ⇒ Hash 



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# File 'lib/ardm/support/mash.rb', line 141

def to_hash
  Hash.new(default).merge(self)
end

#update(other_hash) ⇒ Mash Also known as: merge!

Updates the mash with the key/value pairs from the specified hash.



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# File 'lib/ardm/support/mash.rb', line 53

def update(other_hash)
  other_hash.each_pair { |key, value| regular_writer(convert_key(key), convert_value(value)) }
  self
end

#values_at(*indices) ⇒ Array 



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# File 'lib/ardm/support/mash.rb', line 84

def values_at(*indices)
  indices.collect {|key| self[convert_key(key)]}
end