Get Programming With Haskell by Will Kurt

Author:Will Kurt [Douglas Crockford]
Language: eng
Format: epub
ISBN: 1617293768
Amazon: 1617293768
Publisher: Manning Publications
Published: 2018-04-02T00:00:00+00:00

Now you can use this IO action in your main to modify your image file:

main :: IO () main = do args <- getArgs let fileName = head args imageFile <- BC.readFile fileName glitched <- randomReplaceByte imageFile let glitchedFileName = mconcat ["glitched_",fileName] BC.writeFile glitchedFileName glitched print "all done"

You can compile your program and run it at the command line:

$ ghc glitcher.hs $ ./glitcher lovecraft.jpg

These results are okay but not as dramatic as you’d hoped, as shown in figure 25.3.

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