lukaszkorecki · February 16, 2015 10:35
diff --git a/f.rb b/f.rb
 ha = {
  a: 1,
  b: 2,
  c: 3
 }

 # With default.
 s = [:a, :d, :c].map { |k| { k => ha.fetch(k, -1) } }.reduce(&:merge!)

 puts ha
 puts s

 # Throw if no defaults
 [:a, :d, :c].map { |k| { k => ha.fetch(k) } }.reduce(&:merge!)
	ha = {
	a: 1,
	b: 2,
	c: 3
	}

	# With default.
	s = [:a, :d, :c].map { \|k\| { k => ha.fetch(k, -1) } }.reduce(&:merge!)

	puts ha
	puts s

	# Throw if no defaults
	[:a, :d, :c].map { \|k\| { k => ha.fetch(k) } }.reduce(&:merge!)