Reading a file concurrently

Question

The reading part isn\'t concurrent but the processing is. I phrased the title this way because I\'m most likely to search for this problem again using that phrase. :)

Answer 1

Edit: The answer by @tomasz above is the correct one. Please disregard this answer.

You need to do two things:

1. use buffered chan's so that sending doesn't block
2. close the results chan so that receiving doesn't block.

The use of buffered channels is essential because unbuffered channels need a receive for each send, which is causing the deadlock you're hitting.

If you fix that, you'll run into a deadlock when you try to receive the results, because results hasn't been closed.

Here's the fixed playground: http://play.golang.org/p/DtS8Matgi5