Quiz
Consider a scalar-valued function of arity n [$]f = f(x_1,... ,x_n)[$] From this function we want to fix [$]n-1[$] arbitrary arguments leaving one argument free as it were, resulting in a (higher-order) function of arity 1.. The idea is to cycle over each argument from 1 to n, thereby creating a function of arity 1.
ex
f(x,y,z)
g1(x) = f(x, 2.0, 1.0)
g2(y) = f(2.0, y, 1.0)
g3(z) = f(2.0, 2.0, z)
Can it be done?
I bet Mathematica or Haskell yes?
Serving the Quantitative Finance Community
Re: Quizzies, Brainteasers: Functional Programming in C++
I'm not sure what you're trying to do.
If the goal is to do what you did in the example, then didn't you already do it?
If the goal is to do what you did in the example, then didn't you already do it?
-
- Cuchulainn
- Posts: 22926
- Joined:
Re: Quizzies, Brainteasers: Functional Programming in C++
But i want to do it for any function of any arity n = 1,2,3,...I'm not sure what you're trying to do.
If the goal is to do what you did in the example, then didn't you already do it?
The compile-time example was only an example to show the intent.
At run-time I want to do it for a variable number of arguments that is only known at run-time.
Re: Quizzies, Brainteasers: Functional Programming in C++
THIS?
IMPLICIT DOUBLE PRECISION (A-H,L,O-Z)
IMPLICIT INTEGER (I-K,M-N)
PARAMETER (N=20)
DIMENSION G(N),X(N),Y(N),X0(N)
DO 110 J=1,N
Y(J)=X0(J)
110 CONTINUE
DO 100 I=1,N
Y(I)=X(I)
G(I)=F(Y)
Y(I)=X0(I)
100 CONTINUE
END
DOUBLE PRECISION FUNCTION F(X)
IMPLICIT DOUBLE PRECISION (A-H,L,O-Z)
IMPLICIT INTEGER (I-K,M-N)
DIMENSION X(*)
F = DSIN(X(1))
RETURN
END
IMPLICIT DOUBLE PRECISION (A-H,L,O-Z)
IMPLICIT INTEGER (I-K,M-N)
PARAMETER (N=20)
DIMENSION G(N),X(N),Y(N),X0(N)
DO 110 J=1,N
Y(J)=X0(J)
110 CONTINUE
DO 100 I=1,N
Y(I)=X(I)
G(I)=F(Y)
Y(I)=X0(I)
100 CONTINUE
END
DOUBLE PRECISION FUNCTION F(X)
IMPLICIT DOUBLE PRECISION (A-H,L,O-Z)
IMPLICIT INTEGER (I-K,M-N)
DIMENSION X(*)
F = DSIN(X(1))
RETURN
END
-
- Cuchulainn
- Posts: 22926
- Joined:
Re: Quizzies, Brainteasers: Functional Programming in C++
is this bad practice in C++
Code: Select all
int netbuf[4* 1000000];