Assignment versus binding

[Rustom Mody]

On Wednesday, October 5, 2016 at 7:05:02 PM UTC+5:30, BartC wrote:
> On 05/10/2016 14:13, Rustom Mody wrote:
> > On Wednesday, October 5, 2016 at 4:24:01 PM UTC+5:30, BartC wrote:
> >> On 05/10/2016 11:03, Ben Bacarisse wrote:
> 
> >>> spam io = do x <- io;
> >>>              print x;
> >>>              x <- io;
> >>>              print (x+1)
> >>
> >> (I downloaded Haskell (ghc) yesterday to try this out. First problem was
> >> that I couldn't figure out how to do two things one after another
> >> (apparently you need 'do').
> >>
> >> And when I tried to use a random number function in an expression to see
> >> if it was evaluated once or twice, apparently my installation doesn't
> >> have any form of random() (despite being a monstrous 1700MB with 20,000
> >> files).
> >
> > In general this may be true.
> > In general you need to use cabal or stack in haskell-world like you use
> > pip in python world to get what stuff you need
> >
> > However for Random it seems to be part of System:
> > https://hackage.haskell.org/package/random-1.1/docs/System-Random.html
> >
> >
> > Here’s a session just blindly following
> > https://www.schoolofhaskell.com/school/starting-with-haskell/libraries-and-frameworks/randoms
> >
> > $ ghci
> > GHCi, version 7.10.3: http://www.haskell.org/ghc/  :? for help
> > Prelude> import System.Random
> 
> That's the one it can't find. Actually it can't seem to import any 
> standard libraries, so the implementation must be screwed up.
> 
> Or is it because I downloaded the Minimal** rather Full version? The 
> minimal version is already 1.7GB! Can it really be that big and yet not 
> include such basic stuff? If so, what on earth is taking up all the 
> space! (The full version was 10-15% bigger.)
> 
> (** 
> https://downloads.haskell.org/~platform/8.0.1/HaskellPlatform-8.0.1-minimal-x86_64-setup-a.exe)

Minimal means only compiler: NO libraries except what the compiler needs to compile.
Almost certainly wrong for a beginner’s testing the waters.

You should probably download haskell-platform (full)

[Disclaimer: Dont know too much about haskell on windows]