/prog/ - C pointer

Name: Anonymous 2012-09-18 17:01

Let's say i've allocated memory for a dxd-matrix (displayed as a d^2 vector) like this:

double* A = calloc(d*d, sizeof(double));

Now i want to set the whole vector at one, like

" &A = {0,1,2,3}; "

But isn't working, is there a method setting the whole vector at once without going through every entry A[i] i=0,...,3?

Thank you!

Name: Anonymous 2012-09-18 17:03

lel no.

Name: Anonymous 2012-09-18 17:12

memcpy

Name: Anonymous 2012-09-18 18:47

>>1
*(struct t { double d[4]; }*)A = (struct t){ 0, 1, 2, 3 };

Name: Anonymous 2012-09-18 18:58

/polecat kebabs/

Name: Anonymous 2012-09-19 2:52

rep movsb

Name: Anonymous 2012-09-19 4:41

>>4
That is awful.

Name: Anonymous 2012-09-19 10:19

>>1
Use a language with first-class arrays.

(HEAP[d,d]REAL a; # Allocate an array on the heap #

a[1,] := (0, 1, 2, 3); # Set first row #

a[,1] := (0, 1, 2, 3); # Set first column #

a) # Result is the array #

Name: Anonymous 2012-09-19 23:52

>>7
Unnecessary, too. What happens if the stride of the matrix isn't 4.

Name: Anonymous 2012-09-20 0:56

Damn you are so retarded.

Name: Anonymous 2012-09-20 8:07

>>10
Shalom!

Name: Anonymous 2013-08-31 17:53

Pure muscle memory for me. Some of the harder songs I might fail a bunch, but I catch on if I keep it up.
Rin-chan Now! is a good example of a song that I got stuck on for a long time before I was able to do it.

Name: Anonymous 2013-08-31 19:24

I'm laughing too hard to be upset that it's gone.

Name: Anonymous 2013-09-01 19:56

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C pointer

1 Name: Anonymous 2012-09-18 17:01

2 Name: Anonymous 2012-09-18 17:03

3 Name: Anonymous 2012-09-18 17:12

4 Name: Anonymous 2012-09-18 18:47

5 Name: Anonymous 2012-09-18 18:58

6 Name: Anonymous 2012-09-19 2:52

7 Name: Anonymous 2012-09-19 4:41

8 Name: Anonymous 2012-09-19 10:19

9 Name: Anonymous 2012-09-19 23:52

10 Name: Anonymous 2012-09-20 0:56

11 Name: Anonymous 2012-09-20 8:07

12 Name: Anonymous 2013-08-31 17:53

13 Name: Anonymous 2013-08-31 19:24

14 Name: Anonymous 2013-09-01 19:56