Programming Languages and Paradigms COMP 302
Prof. Errington
School of Computer Science Mc
Copyright By PowCoder代写 加微信 powcoder
Fall 2022 – Week 3, lesson 2
Announcements
Elections: 3 October. Classes cancelled. (No effect to us.)
Advance polling available. (See #announcements.)
HW1 will be released today and will be due next Friday at 2am, i.e. in the night from Thursday to Friday.
Solutions and grades should be released the following Monday or Tuesday at the latest.
Last time…
Pattern-matching:
Last time…
Pattern-matching:
Match on multiple things at once by forming a tuple, i.e. match (a, b) with …
Last time…
Pattern-matching:
Match on multiple things at once by forming a tuple, i.e.
match (a, b) with … Match_failure exception
Last time…
Pattern-matching:
Match on multiple things at once by forming a tuple, i.e.
match (a, b) with …
Match_failure exception
let-expressions can also use patterns, i.e.
let p = e1 in e2 – useful for tuples!
Last time…
Pattern-matching:
Match on multiple things at once by forming a tuple, i.e.
match (a, b) with …
Match_failure exception
let-expressions can also use patterns, i.e.
let p = e1 in e2 – useful for tuples!
Last time…
Pattern-matching:
Match on multiple things at once by forming a tuple, i.e.
match (a, b) with … Match_failure exception
let-expressions can also use patterns, i.e.
let p = e1 in e2 – useful for tuples!
let (p1, p2) = e1 in e2
Special case: let x = e1 in e2
(A bare variable is the simplest pattern!)
Last time…
Pattern-matching:
Match on multiple things at once by forming a tuple, i.e.
match (a, b) with …
Match_failure exception
let-expressions can also use patterns, i.e.
let p = e1 in e2 – useful for tuples!
let (p1, p2) = e1 in e2
Special case: let x = e1 in e2
(A bare variable is the simplest pattern!) Recursive types:
Last time…
Pattern-matching:
Match on multiple things at once by forming a tuple, i.e.
match (a, b) with …
Match_failure exception
let-expressions can also use patterns, i.e.
let p = e1 in e2 – useful for tuples!
let (p1, p2) = e1 in e2
Special case: let x = e1 in e2
(A bare variable is the simplest pattern!) Recursive types:
A linked list of cards, recursively defined: type hand = Empty | Card of card * hand
This time…
Polymorphic types.
Higher-order functions!
This time…
Polymorphic types.
Higher-order functions!
Buckle up.
Polymorphic types
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