calloc equivalent

[RJ]

Hi all,

SImple question. How do I allocate an array of an runtime-determined
size? I didn't see anything obvious in the tutorial or language
specification.

I tried

var d *[...]int= new([flag.NArg()]int);

but I get

map_fun.go:13: invalid array bound flag.NArg()

among other errors, presumably because the type needs a constant in
the array bound. What is the go-ish way to do this?

rj

[Russ Cox]

You can't allocate a variable-sized array, but you can allocate a slice.

var d []int = make([]int, flag.NArg());

or more idiomatically

d := make([]int, flag.NArg());

See also http://golang.org/doc/effective_go.html#slices

Enjoy!
Russ

[RJ]

Thanks!

rj