How to remove speicific value constructor in a list using traversal
data Fruit = Apple Int | Banana Color Int data Color = Red | Green let basket = [Apple 3,Banana Red 30,Apple 6] The goal is to keep Banana only How to remove all Apple {} in the list basket ? using traversal (https://hackage.haskell.org/package/lens-5.3.2/docs/Control-Lens-Traversal.html) ? Once the traversal is built then I can remove them […]
How to remove speicific value constructor in a list using traversal
data Fruit = Apple Int | Banana Color Int data Color = Red | Green let basket = [Apple 3,Banana Red 30,Apple 6] The goal is to keep Banana only How to remove all Apple {} in the list basket ? using traversal (https://hackage.haskell.org/package/lens-5.3.2/docs/Control-Lens-Traversal.html) ? Once the traversal is built then I can remove them […]
How to remove speicific value constructor in a list using traversal
data Fruit = Apple Int | Banana Color Int data Color = Red | Green let basket = [Apple 3,Banana Red 30,Apple 6] The goal is to keep Banana only How to remove all Apple {} in the list basket ? using traversal (https://hackage.haskell.org/package/lens-5.3.2/docs/Control-Lens-Traversal.html) ? Once the traversal is built then I can remove them […]
How to remove speicific value constructor in a list using traversal
data Fruit = Apple Int | Banana Color Int data Color = Red | Green let basket = [Apple 3,Banana Red 30,Apple 6] The goal is to keep Banana only How to remove all Apple {} in the list basket ? using traversal (https://hackage.haskell.org/package/lens-5.3.2/docs/Control-Lens-Traversal.html) ? Once the traversal is built then I can remove them […]
How to remove speicific value constructor in a list using traversal
data Fruit = Apple Int | Banana Color Int data Color = Red | Green let basket = [Apple 3,Banana Red 30,Apple 6] The goal is to keep Banana only How to remove all Apple {} in the list basket ? using traversal (https://hackage.haskell.org/package/lens-5.3.2/docs/Control-Lens-Traversal.html) ? Once the traversal is built then I can remove them […]
How to remove speicific value constructor in a list using traversal
data Fruit = Apple Int | Banana Color Int data Color = Red | Green let basket = [Apple 3,Banana Red 30,Apple 6] The goal is to keep Banana only How to remove all Apple {} in the list basket ? using traversal (https://hackage.haskell.org/package/lens-5.3.2/docs/Control-Lens-Traversal.html) ? Once the traversal is built then I can remove them […]
How to display variable contents onto a GUI using Haskell’s Monomer
I’m creating a calculator GUI and I have the user able to type in an expression, press the enter key, and the expression will then be evaluated. Right now a variable is storing the result of the evaluation and I want it displayed on the screen. I’m not sure how to do that seeing as I only know how to create buttons, labels, and recognize keystrokes. Any help would be greatly appreciated!