paneq

> f= Fiber.new { puts "x" }
> f.resume
x
 => nil 
> f.resume
FiberError: dead fiber called

paneq

> f = Fiber.new{ puts "first"; Fiber.yield; puts "second" }
> f.resume
first
 => nil 
> f.resume
second
 => nil 
> f.resume
FiberError: dead fiber called

paneq

> f = Fiber.new{ Fiber.yield 2; Fiber.yield 3; Fiber.yield 5; Fiber.yield 7; }
> f.resume
 => 2 
> f.resume
 => 3 
> f.resume
 => 5 
> f.resume
 => 7 
> f.resume

paneq

f = Fiber.new{ Fiber.yield 7; "OMG Fibers"}
> f.resume
 => 7
> f.resume
 => "OMG Fibers"

paneq

> f = Fiber.new{ 5.times{|x| Fiber.yield(x+10) }; nil }
> 6.times{ puts f.resume.inspect  }
10
11
12
13
14
nil

paneq

> f = Fiber.new{ loop{ Fiber.yield rand() } }
> f.resume
 => 0.284433348607815 
> f.resume
 => 0.49985331837809865 
> f.resume
 => 0.41816746846163666

paneq

> f1 = Fiber.new{ loop{ Fiber.yield rand() } }
> f2 = Fiber.new{ ary = [true, false]; loop{ Fiber.yield(ary.sample)  } }
> f1.resume
 => 0.39994797202857346 
> f2.resume
 => false 
> f2.resume
 => false
> f1.resume
 => 0.9078216956199455 

paneq

ruby-1.9.2-p180-fastrequire :057 > f1 = Fiber.new{ i = 1; loop{ i+= 1; Fiber.yield(i) if Prime.prime?(i) } }
 => #<Fiber:0x0000000234a150> 
ruby-1.9.2-p180-fastrequire :058 > f2 = Fiber.new{ i = 1; loop{ i+= 1; Fiber.yield(i**2)  } }
 => #<Fiber:0x00000002329c48> 
ruby-1.9.2-p180-fastrequire :060 >   4.times do
ruby-1.9.2-p180-fastrequire :061 >     puts f1.resume + f2.resume
ruby-1.9.2-p180-fastrequire :062?>   end
6
12
21

paneq

> require 'prime'
> f1 = Fiber.new{ i = 1; loop{ i+= 1; Fiber.yield(i) if Prime.prime?(i) } }
> f2 = Fiber.new{ i = 1; loop{ i+= 1; Fiber.yield(i**2)  } }
> 4.times do
>   puts f1.resume + f2.resume
> end
6
12
21
32

paneq

results = []
f1 = Fiber.new do 
  i = 1
  loop do 
    i+= 1
    if Prime.prime?(i)
      results << i
      Fiber.yield(i)
    end
  end