Pattern matching
Patterns define functions by shape and replace long conditionals.
What you will be able to do
- Match on constructors and literals.
- Use _ for unused values.
- Order matters.
In plain English
Patterns define functions by shape and replace long conditionals.
- Match on constructors and literals.
- Use _ for unused values.
- Order matters.
classify :: Int -> String
classify 0 = "zero"
classify n | n > 0 = "positive"
| otherwise = "negative"Your turn
EasyExplain it back
Answer from memory: What does the underscore pattern mean?
TEXT · starter
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Knowledge checkQuestion 1
What does the underscore pattern mean?
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