On 4/1/2010 6:34 PM, kj wrote:
When coding C I have often found static local variables useful for
doing once-only run-time initializations. For example:
int foo(int x, int y, int z) {
static int first_time = TRUE;
static Mongo *mongo;
if (first_time) {
mongo = heavy_lifting_at_runtime();
first_time = FALSE;
}
return frobnicate(mongo, x, y, z);
Global var or class or closure such as below (obviously untested ;=):
make_foo()
mongo = heavy_lifting_at_runtime();
def _(x,y,z):
return frobnicate(mongo, x, y, z)
return _
foo = make_foo
del make_foo # to make sure it is *never* called again ;
Now you only have foo with a hard-to-access private object and no
first_time checks when you call it.
Terry Jan Reedy
--
http://mail.python.org/mailman/listinfo/python-list
