Treasure Chest
10 Points
generics
Instructions
In this exercise you're going to write a generic (/ magical!) TreasureChest, to store some treasure.
1. Define the TreasureChest generic custom type
Define a TreasureChest custom type with a single variant.
The variant should have an associated String value, which will be used to store the password of the treasure chest.
The variant should also have an associate generic value, which will be used to store the treasure. This value is generic so that the treasure can be anything.
2. Define the getTreasure function
This function should take two parameters
- a
String(for trying a password) - a
TreasureChestgeneric custom type
This function should check the provided password attempt against the String in the TreasureChest.
The function should return a Maybe.
If the passwords match then return Just with the generic value from the TreasureChest (the treasure!)
If the passwords do not match then return Nothing.
3. Define the multiplyTreasure function
This (higher order) function should take two parameters
- a multiplier function that takes one generic parameter, and returns a list of the same generic type
- a
TreasureChestgeneric custom type, also with the same generic type
This function should call the multiplier function with the treasure in the chest.
The function should return a new TreasureChest, with the same password as the original, and with the multiplied treasure (the return)
Treasure Chest
10 Points
generics
Instructions
In this exercise you're going to write a generic (/ magical!) TreasureChest, to store some treasure.
1. Define the TreasureChest generic custom type
Define a TreasureChest custom type with a single variant.
The variant should have an associated String value, which will be used to store the password of the treasure chest.
The variant should also have an associate generic value, which will be used to store the treasure. This value is generic so that the treasure can be anything.
2. Define the getTreasure function
This function should take two parameters
- a
String(for trying a password) - a
TreasureChestgeneric custom type
This function should check the provided password attempt against the String in the TreasureChest.
The function should return a Maybe.
If the passwords match then return Just with the generic value from the TreasureChest (the treasure!)
If the passwords do not match then return Nothing.
3. Define the multiplyTreasure function
This (higher order) function should take two parameters
- a multiplier function that takes one generic parameter, and returns a list of the same generic type
- a
TreasureChestgeneric custom type, also with the same generic type
This function should call the multiplier function with the treasure in the chest.
The function should return a new TreasureChest, with the same password as the original, and with the multiplied treasure (the return)