This is an example program for dealing with streams in Node.

filter.js takes a stream of either 'x' or 'y' (utf8) via stdin.

Once a pattern is matched, it will print the pattern name to the console.

The patterns in this example are A: 'xxx' and B: 'xyx'.

Uncomment the console.log at ln.26 to see the buffer actively filling!

the generator.js program emits a sample stream of pseudorandom x and y characters.

Uncomment the setTimeout block to limit the program to 10 seconds.

You can pipe these programs together using the following command:

node generator.js | node filter.js