Yes, exactly! On Sun, Dec 23, 2018 at 02:08:57PM +0100, Damien Mattei wrote:
lazyness....?
On Sun, Dec 23, 2018 at 8:40 AM Tom Ellis < tom-lists-haskell-cafe-2017@jaguarpaw.co.uk> wrote:
On Sat, Dec 22, 2018 at 09:52:18AM +0100, Damien Mattei wrote:
i have inserted trace statement that output variable ... i have strange behavior of output:
Let's take a simpler example. Do you understand why the trace statments from this small program appear in the order that they do? (And for what it's worth I really think you'll be better off writing programs using do notation).
% cat test.hs import Debug.Trace
result = let a = trace "evaluating a" 2 b = trace "evaluating b" 10 c = trace "evaluating c" (a + b) in c ~% ghci -e result test.hs evaluating c evaluating b evaluating a 12