[Haskell-cafe] list comprehension doesn't work

[Jerzy Karczmarczuk]

MATEUSZ,

There is nothing wrong with sending beginner questions to h-café!
After all, a FRIENDLY community is for whom? For Simon PJ only?

Notice that "John" got more than a dozen answers, people TRY to help him 
anyway.
==

On the other hand, the original requester *should* have thought on:

1. Putting down in a concise, but explicit manner what was for him the 
expected result. And also:
2. Writing what were the errors signalled by the system.

But no, we had just "help!, nothing works".  This should be avoided, 
some people are reluctant to analyze situations too obscure, even if one 
"almost-syntax" error was clear...

Jerzy Karczmarczuk