"main=interact id" basically echoes every line of my input, whereas
"main=interact show" correctly waits for EOF before outputting something.
Which of these are you claiming is wrong?
I guess "interact" does what it should, but I think it should be changed to avoid interleaved in- and output.
lose Ctrl-D. C'est la vie.
That is okay if I'm daring enough to change the buffering.
Hugs and NHC gave me no chance for "ctrl-d", though.
I'd say steer clear of introducing students to interact.
Good advice (currently), but I thought, interact could be used for a simple stand alone program, that does not require "do" (or ">>=").
Christian
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