[Haskell-cafe] Strictness in do block

Neil Mitchell ndmitchell at gmail.com
Wed Jul 5 07:08:16 EDT 2006


> What I want to know is the generic way to force an entire String (or
> other list, perhaps from hGetContents) to be evaluated (read into RAM, I
> guess) so the underlying file can be closed.... and do it right now.
What I have done in the past is to take the length of the string, and
test the length in some way - although I guess you could call seq on
the length.

Of course, the length tests technically doesn't evaluate the character
positions (just the spine of the list), but it always works in



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