On 22 May 2005 14:17, Jim Apple wrote:
Simon Peyton Jones wrote:
- For command-line 'let' and 'x<-e' forms, if exactly one variable is bound, we print its value if it is Showable and not () prompt> let x = 4 4 prompt> x <- return 5 5
prompt> let ones = [1:x]
What am I to do if I want ones set, but not printed?
I think you mean let ones = 1:ones but it's a good point. At the moment you can hack around it with let ones = 1:ones; x=x (for example). Simon: I think let bindings should be exempt from the new auto-show behaviour. The docs currently say that let doesn't evaluate its rhs: An important difference between the two types of binding is that the monadic bind (p <- e) is strict (it evaluates e), whereas with the let form, the expression isn't evaluated immediately: and the example that follows that paragraph is currently wrong (the let binding will yield an exception). Cheers, Simon