[Haskell-cafe] Arrow key functionality for REPL written in Haskell

[PENG, BO YA]

Hi,

I'm trying to implement the arrow key functionality for a systemf REPL to
recall previously entered lines. I think I should save the previous lines
in a list and then traverse through the list when an arrow key is pressed,
but I'm no sure how to detect an arrow key and implement this functionality.
Can anyone give a brief description about the implementation or point me to
some other resources?
Thanks!

Emma
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