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Contents
class Hash
# File activesupport/lib/active_support/core_ext/hash/keys.rb
#
# hash = { name: 'Rob', age: '28' }
# hash.transform_keys{ |key| key.to_s.upcase }
# => { "NAME" => "Rob", "AGE" => "28" }
def transform_keys
result = {}
each_key do |key|
result[yield(key)] = self[key]
end
result
end
def transform_keys!(&block)
keys.each do |key|
value = delete(key)
self[yield(key)] = value.is_a?(Hash) ? value.transform_keys!(&block) : value
end
self
end
# hash = { 'name' => 'Rob', 'age' => '28' }
# hash.symbolize_keys
# => { name: "Rob", age: "28" }
def symbolize_keys
transform_keys{ |key| key.to_sym rescue key }
end
# File activesupport/lib/active_support/core_ext/hash/keys.rb, line 135
def symbolize_keys!
transform_keys!{ |key| key.to_sym rescue key }
end
# Merges the caller into +other_hash+. For example,
#
# options = options.reverse_merge(size: 25, velocity: 10)
#
# is equivalent to
#
# options = { size: 25, velocity: 10 }.merge(options)
#
# This is particularly useful for initializing an options hash
# with default values.
def reverse_merge(other_hash)
other_hash.merge(self)
end
# Destructive +reverse_merge+.
def reverse_merge!(other_hash)
# right wins if there is no left
merge!(other_hash) { |key,left,right| left }
end
end
Version data entries
14 entries across 14 versions & 3 rubygems