Class | Hashish |
In: |
lib/core_ext/hashish.rb
|
Parent: | Hash |
Stolen from Rails Active Support and renamed to Hashish.
This class has dubious semantics and we only have it so that people can write params[:key] instead of params[‘key’] and they get the same value for both keys.
[]= | -> | regular_writer |
# File lib/core_ext/hashish.rb, line 7 def initialize(constructor = {}) if constructor.is_a?(Hash) super() update(constructor) else super(constructor) end end
# File lib/core_ext/hashish.rb, line 121 def convert_key(key) key.kind_of?(Symbol) ? key.to_s : key end
# File lib/core_ext/hashish.rb, line 125 def convert_value(value) case value when Hash value.with_indifferent_access when Array value.collect { |e| e.is_a?(Hash) ? e.with_indifferent_access : e } else value end end
# File lib/core_ext/hashish.rb, line 16 def default(key = nil) if key.is_a?(Symbol) && include?(key = key.to_s) self[key] else super end end
Removes a specified key from the hash.
# File lib/core_ext/hashish.rb, line 106 def delete(key) super(convert_key(key)) end
Returns an exact copy of the hash.
# File lib/core_ext/hashish.rb, line 85 def dup HashWithIndifferentAccess.new(self) end
Fetches the value for the specified key, same as doing hash[key]
# File lib/core_ext/hashish.rb, line 69 def fetch(key, *extras) super(convert_key(key), *extras) end
Checks the hash for a key matching the argument passed in:
hash = HashWithIndifferentAccess.new hash["key"] = "value" hash.key? :key # => true hash.key? "key" # => true
# File lib/core_ext/hashish.rb, line 60 def key?(key) super(convert_key(key)) end
Merges the instantized and the specified hashes together, giving precedence to the values from the second hash Does not overwrite the existing hash.
# File lib/core_ext/hashish.rb, line 91 def merge(hash) self.dup.update(hash) end
Performs the opposite of merge, with the keys and values from the first hash taking precedence over the second. This overloaded definition prevents returning a regular hash, if reverse_merge is called on a HashWithDifferentAccess.
# File lib/core_ext/hashish.rb, line 97 def reverse_merge(other_hash) super other_hash.with_indifferent_access end
# File lib/core_ext/hashish.rb, line 101 def reverse_merge!(other_hash) replace(reverse_merge( other_hash )) end
Updates the instantized hash with values from the second:
hash_1 = HashWithIndifferentAccess.new hash_1[:key] = "value" hash_2 = HashWithIndifferentAccess.new hash_2[:key] = "New Value!" hash_1.update(hash_2) # => {"key"=>"New Value!"}
# File lib/core_ext/hashish.rb, line 46 def update(other_hash) other_hash.each_pair { |key, value| regular_writer(convert_key(key), convert_value(value)) } self end