Method: Hash#fetch_nested

Defined in:
lib/core/facets/hash/fetch_nested.rb

#fetch_nested(*keys) ⇒ Object

Similar to Hash#fetch but supports nested lookup and is ‘nil` safe.

{}.fetch_nested('anything','at','all')  #=> nil

h = {'hello'=>{'world'=>42}}
h.fetch_nested(*['hello','world'])  #=> 42

CREDIT: T. Yamada and Sean Mackesey


12
13
14
15
16
17
18
 
# File 'lib/core/facets/hash/fetch_nested.rb', line 12

def fetch_nested(*keys)
  begin
    keys.reduce(self){|accum, k| accum.fetch(k)}
	rescue (RUBY_VERSION<'1.9' ? IndexError : KeyError)
    block_given? ? yield(*keys) : nil
  end
end