With node-fibers, we can write codes in traditionally synchronous fashion and avoid deep nested callback calls without blocking the Node event loop.
Below is an example to generate Fibonacci series. Each run resumes the calculation loop and returns a number to the calling code.
1 Fiber = require 'fibers'
2
3 Fibonacci = ->
4 return Fiber(->
5 Fiber.yield 0
6 prev = 0
7 curr = 1
8 while true
9 Fiber.yield curr
10 tmp = prev + curr
11 prev = curr
12 curr = tmp
13 )
14
15 seq = Fibonacci()
16 i = 0
17 while i < 100
18 i = seq.run()
19 console.log i
20 #coffee fibonacci.coffee
21 #0
22 #1
23 #1
24 #2
25 #3
26 #5
27 #8
28 #13
29 #21
30 #34
31 #55
32 #89
33 #144
2
3 Fibonacci = ->
4 return Fiber(->
5 Fiber.yield 0
6 prev = 0
7 curr = 1
8 while true
9 Fiber.yield curr
10 tmp = prev + curr
11 prev = curr
12 curr = tmp
13 )
14
15 seq = Fibonacci()
16 i = 0
17 while i < 100
18 i = seq.run()
19 console.log i
20 #coffee fibonacci.coffee
21 #0
22 #1
23 #1
24 #2
25 #3
26 #5
27 #8
28 #13
29 #21
30 #34
31 #55
32 #89
33 #144
