good ideas in programming languages
Post on 22-Jan-2018
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•• int [,] x = new int[2,2] { { 1,2 }, {3, 4} };• x = [1 2; 3 4]
•••• Z = [A B]• X' X^-1•
c * A
A * B
•A \ B
𝑎 𝑏𝑐 𝑑
×𝑒 𝑓𝑔 ℎ
=𝑎𝑒 + 𝑏𝑔 𝑎𝑓 + 𝑏ℎ𝑐𝑒 + 𝑑𝑔 𝑐𝑓 + 𝑑ℎ
𝑎 𝑏𝑐 𝑑
⨀𝑒 𝑓𝑔 ℎ
=𝑎𝑒 𝑏𝑓𝑐𝑔 𝑑ℎ
•• 3f32
•
•X' * Y • X' *
••
x = {[(2+3)-4]/2};•
• 𝑥𝑖𝑗
X = [1 2; 3 4];X = [ 1 2
3 4 ];
X * Y;X .* Y;
{ … }
(x:i32) -> float { … }
f := (x:i32) -> float { … }
f := (x:i32) -> float { … }
•
data class Person(var name:String, var age:Int)
equals()/hashCode()
toString()
val (name, age) = john
val john = Person("John", 23)val jane = john.copy(name = "Jane")
class Foo{
group names{
first, middle?, last : string}
}
names
struct Foo SOA{
int x;bool b;
}
Foo foos[128];
int[128]bool[128]
≠ ≤ ≥
⋅ ⨉ ⨀
x²+y³
∧ ∨
x.Contains(y)
!x.Contains(y)
x.Count == 0
x.All(e => y.Contains(e))
x.Remove(e => y.Contains(e))
y ∈ x or x ∋ y
y ∉ x
x = ∅
y ⊂ x
x ∖= y
∀x : {x ∈ items | x > 0}{print(x)
}
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