Class: Hash
- Defined in:
- lib/symbolized/core_ext/hash/keys.rb,
lib/symbolized/core_ext/object/deep_dup.rb,
lib/symbolized/core_ext/hash/reverse_merge.rb,
lib/symbolized/core_ext/hash/symbolized_hash.rb
Direct Known Subclasses
Instance Method Summary collapse
-
#assert_valid_keys(*valid_keys) ⇒ Object
Validate all keys in a hash match
*valid_keys
, raising ArgumentError on a mismatch. -
#deep_dup ⇒ Object
Returns a deep copy of hash.
-
#deep_stringify_keys ⇒ Object
Returns a new hash with all keys converted to strings.
-
#deep_stringify_keys! ⇒ Object
Destructively convert all keys to strings.
-
#deep_symbolize_keys ⇒ Object
Returns a new hash with all keys converted to symbols, as long as they respond to
to_sym
. -
#deep_symbolize_keys! ⇒ Object
Destructively convert all keys to symbols, as long as they respond to
to_sym
. -
#deep_transform_keys(&block) ⇒ Object
Returns a new hash with all keys converted by the block operation.
-
#deep_transform_keys!(&block) ⇒ Object
Destructively convert all keys by using the block operation.
-
#reverse_merge(other_hash) ⇒ Object
Merges the caller into
other_hash
. -
#reverse_merge!(other_hash) ⇒ Object
(also: #reverse_update)
Destructive
reverse_merge
. -
#stringify_keys ⇒ Object
Returns a new hash with all keys converted to strings.
-
#stringify_keys! ⇒ Object
Destructively convert all keys to strings.
-
#symbolize_keys ⇒ Object
(also: #to_options)
Returns a new hash with all keys converted to symbols, as long as they respond to
to_sym
. -
#symbolize_keys! ⇒ Object
(also: #to_options!)
Destructively convert all keys to symbols, as long as they respond to
to_sym
. -
#to_symbolized_hash ⇒ Object
(also: #nested_under_symbolized_hash)
Returns a
Symbolized::SymbolizedHash
out of its receiver:. -
#transform_keys ⇒ Object
Returns a new hash with all keys converted using the block operation.
-
#transform_keys! ⇒ Object
Destructively convert all keys using the block operations.
Instance Method Details
#assert_valid_keys(*valid_keys) ⇒ Object
Validate all keys in a hash match *valid_keys
, raising ArgumentError on a mismatch.
Note that keys are treated differently than HashWithIndifferentAccess, meaning that string and symbol keys will not match.
{ name: 'Rob', years: '28' }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key: :years. Valid keys are: :name, :age"
{ name: 'Rob', age: '28' }.assert_valid_keys('name', 'age') # => raises "ArgumentError: Unknown key: :name. Valid keys are: 'name', 'age'"
{ name: 'Rob', age: '28' }.assert_valid_keys(:name, :age) # => passes, raises nothing
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 71 def assert_valid_keys(*valid_keys) valid_keys.flatten! each_key do |k| unless valid_keys.include?(k) raise ArgumentError.new("Unknown key: #{k.inspect}. Valid keys are: #{valid_keys.map(&:inspect).join(', ')}") end end end |
#deep_dup ⇒ Object
Returns a deep copy of hash.
hash = { a: { b: 'b' } }
dup = hash.deep_dup
dup[:a][:c] = 'c'
hash[:a][:c] # => nil
dup[:a][:c] # => "c"
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# File 'lib/symbolized/core_ext/object/deep_dup.rb', line 42 def deep_dup each_with_object(dup) do |(key, value), hash| hash[key.deep_dup] = value.deep_dup end end |
#deep_stringify_keys ⇒ Object
Returns a new hash with all keys converted to strings. This includes the keys from the root hash and from all nested hashes and arrays.
hash = { person: { name: 'Rob', age: '28' } }
hash.deep_stringify_keys
# => {"person"=>{"name"=>"Rob", "age"=>"28"}}
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 107 def deep_stringify_keys deep_transform_keys{ |key| key.to_s } end |
#deep_stringify_keys! ⇒ Object
Destructively convert all keys to strings. This includes the keys from the root hash and from all nested hashes and arrays.
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 114 def deep_stringify_keys! deep_transform_keys!{ |key| key.to_s } end |
#deep_symbolize_keys ⇒ Object
Returns a new hash with all keys converted to symbols, as long as they respond to to_sym
. This includes the keys from the root hash and from all nested hashes and arrays.
hash = { 'person' => { 'name' => 'Rob', 'age' => '28' } }
hash.deep_symbolize_keys
# => {:person=>{:name=>"Rob", :age=>"28"}}
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 126 def deep_symbolize_keys deep_transform_keys{ |key| key.to_sym rescue key } end |
#deep_symbolize_keys! ⇒ Object
Destructively convert all keys to symbols, as long as they respond to to_sym
. This includes the keys from the root hash and from all nested hashes and arrays.
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 133 def deep_symbolize_keys! deep_transform_keys!{ |key| key.to_sym rescue key } end |
#deep_transform_keys(&block) ⇒ Object
Returns a new hash with all keys converted by the block operation. This includes the keys from the root hash and from all nested hashes and arrays.
hash = { person: { name: 'Rob', age: '28' } }
hash.deep_transform_keys{ |key| key.to_s.upcase }
# => {"PERSON"=>{"NAME"=>"Rob", "AGE"=>"28"}}
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 88 def deep_transform_keys(&block) _deep_transform_keys_in_object(self, &block) end |
#deep_transform_keys!(&block) ⇒ Object
Destructively convert all keys by using the block operation. This includes the keys from the root hash and from all nested hashes and arrays.
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 95 def deep_transform_keys!(&block) _deep_transform_keys_in_object!(self, &block) end |
#reverse_merge(other_hash) ⇒ Object
Merges the caller into other_hash
. For example,
= .reverse_merge(size: 25, velocity: 10)
is equivalent to
= { size: 25, velocity: 10 }.merge()
This is particularly useful for initializing an options hash with default values.
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# File 'lib/symbolized/core_ext/hash/reverse_merge.rb', line 12 def reverse_merge(other_hash) other_hash.merge(self) end |
#reverse_merge!(other_hash) ⇒ Object Also known as: reverse_update
Destructive reverse_merge
.
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# File 'lib/symbolized/core_ext/hash/reverse_merge.rb', line 17 def reverse_merge!(other_hash) # right wins if there is no left merge!( other_hash ){|key,left,right| left } end |
#stringify_keys ⇒ Object
Returns a new hash with all keys converted to strings.
hash = { name: 'Rob', age: '28' }
hash.stringify_keys
# => {"name"=>"Rob", "age"=>"28"}
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 33 def stringify_keys transform_keys{ |key| key.to_s } end |
#stringify_keys! ⇒ Object
Destructively convert all keys to strings. Same as stringify_keys
, but modifies self
.
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 39 def stringify_keys! transform_keys!{ |key| key.to_s } end |
#symbolize_keys ⇒ Object Also known as: to_options
Returns a new hash with all keys converted to symbols, as long as they respond to to_sym
.
hash = { 'name' => 'Rob', 'age' => '28' }
hash.symbolize_keys
# => {:name=>"Rob", :age=>"28"}
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 50 def symbolize_keys transform_keys{ |key| key.to_sym rescue key } end |
#symbolize_keys! ⇒ Object Also known as: to_options!
Destructively convert all keys to symbols, as long as they respond to to_sym
. Same as symbolize_keys
, but modifies self
.
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 57 def symbolize_keys! transform_keys!{ |key| key.to_sym rescue key } end |
#to_symbolized_hash ⇒ Object Also known as: nested_under_symbolized_hash
Returns a Symbolized::SymbolizedHash
out of its receiver:
{ 'a' => 1 }.to_symbolized_hash[:a] # => 1
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# File 'lib/symbolized/core_ext/hash/symbolized_hash.rb', line 7 def to_symbolized_hash Symbolized::SymbolizedHash.(self) end |
#transform_keys ⇒ Object
Returns a new hash with all keys converted using the block operation.
hash = { name: 'Rob', age: '28' }
hash.transform_keys{ |key| key.to_s.upcase }
# => {"NAME"=>"Rob", "AGE"=>"28"}
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 8 def transform_keys return enum_for(:transform_keys) unless block_given? result = self.class.new each_key do |key| result[yield(key)] = self[key] end result end |
#transform_keys! ⇒ Object
Destructively convert all keys using the block operations. Same as transform_keys but modifies self
.
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# File 'lib/symbolized/core_ext/hash/keys.rb', line 19 def transform_keys! return enum_for(:transform_keys!) unless block_given? keys.each do |key| self[yield(key)] = delete(key) end self end |