Terry Reedy wrote:
> 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
I suspect you mean
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
>
I don't think I'd ever want to use such an obscure technique in a
program. You might want to consider using functools.wraps to make sure
that the foo function looks right.
regards
Steve
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