The Gofer prelude had a function
openfile :: String -> String
which mapped file path names to strings containing the named files' contents.
The Hugs98 Prelude doesn't seem to have anything like that function.
Instead, it has things like
readFile :: String -> IO String
Why would I want openfile instead of readFile? The problem in which the
need for openfile arose is this:
I want to load a binary search tree and a list with
words read from a file, and then perform, interactively,
several tests comparing the cost of searching the
tree with that of searching the list. In addition to
performing the tests interactively, I want to separate
the cost of searching the list and the tree from the
cost of constructing them.
In order for the list and the tree to be used in several successive
command-line evaluations without being reconstructed each time, they must
be named globally. This is no problem with openfile, but readFile forces
their names to be local to an IO command.
Can anyone suggest a solution?
Thanks,
--Ham
------------------------------------------------------------------
Hamilton Richards Jr. Department of Computer Sciences
Senior Lecturer Mail Code C0500
512-471-9525 The University of Texas at Austin
SHC 434 Austin, Texas 78712-1188
[EMAIL PROTECTED]
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