class Hash
ruby 2.3 support
Public Instance Methods
transform_keys() { |key| ... }
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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"}
If you do not provide a block
, it will return an Enumerator for chaining with other methods:
hash.transform_keys.with_index { |k, i| [k, i].join } # => {"name0"=>"Rob", "age1"=>"28"}
# File lib/me_redis/hash.rb, line 13 def transform_keys return enum_for(:transform_keys) { size } unless block_given? result = {} each_key do |key| result[yield(key)] = self[key] end result end
transform_keys!() { |key| ... }
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Destructively converts all keys using the block
operations. Same as transform_keys
but modifies self
.
# File lib/me_redis/hash.rb, line 23 def transform_keys! return enum_for(:transform_keys!) { size } unless block_given? keys.each do |key| self[yield(key)] = delete(key) end self end