Class | Enumerator |
In: |
lib/core/facets/enumerator/fx.rb
lib/core/facets/enumerator.rb lib/core/facets/to_hash.rb |
Parent: | Object |
initialize | -> | old_initialize |
Provides the ruby-1.9 block form of Enumerator, where you can write:
obj = Enumerator.new do |yielder| # ... yielder.yield(data) # or: yielder << data # ... end
When obj.each is called, the block is run once. It should call yielder.yield with each item it wishes to generate.
Example:
fib = Enumerator.new { |y| a = b = 1 loop { y << a a, b = b, a + b } } fib.take(10) #=> [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
Convert an Enumerator object into a hash. This is equivalent to Array#to_h.
e1 = [[1,:a],[2,:b],[3,:c]].to_enum e1.to_h #=> { 1=>:a, 2=>:b, 3=>:c } e2 = [1,2,3,4,5].to_enum e2.to_h #=> {5=>nil, 1=>2, 3=>4} e3 = [1,2,1,3,1,5].to_enum e3.to_h #=> {1=>5}
CREDIT: Sandor Szücs