Haskell Cheat Sheet
Mark 1
email Scott Turner
basics: definitions and generic expressions
name = ...
if s then x else y
(x)
| |
types, figuring out diagnostics
name :: type
| |
numbers (Int, Integer, Rational, Float, Double)
0, 1, -1, ... 1.0, 2.0, 1.5, 0.6666, ... a + b a - b negate x a * b abs x fromInteger n m % n a ^ n |
function definitions and where (type -> type')
functionName x = ... x ...
functionName' y = ... name ... name' ...
where {
name = ... y ...;
name' = ... y ... name ...
}
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strings (String)
"whatever" s ++ t show x read s |
lists ([type])
map f l [m .. n] [a,b,c] [] k ++ l |
sentences (Bool)
False True a == b a /= b a < b a <= b a >= b a > b s && t s || t not s |
actions (IO type)
do { a;
b
}
do { x <- a;
... x ...
}
return x
putStrLn s
s <- getLine
sequence l
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