大约有 30,000 项符合查询结果（耗时：0.0344秒） [XML]
Scala: List[Future] to Future[List] disregarding failed futures
...version of Scala (2.11.5)... I corrected that, and wrote a few additional tests if anyone is interested... here is my version >
implicit class FutureCompanionOps(val f: Future.type) extends AnyVal {
/** Given a list of futures `fs`, returns the future holding the list of Try's of the fut...
Copy constructor for a class with unique_ptr
...nique_ptr is not copyable, it is only moveable.
This will directly affect Test, which is, in your second, example also only moveable and not copyable.
In fact, it is good that you use unique_ptr which protects you from a big mistake.
For example, the main issue with your first code is that the po...
Does C have a “foreach” loop construct?
...rgv[])
{
list_node list[] = {
{ .next = &list[1], .data = "test 1" },
{ .next = &list[2], .data = "test 2" },
{ .next = NULL, .data = "test 3" }
};
FOR_EACH(item, list)
puts((char *) item->data);
return 0;
}
...
Getting key with maximum value in dictionary?
...
I have tested MANY variants, and this is the fastest way to return the key of dict with the max value:
def keywithmaxval(d):
""" a) create a list of the dict's keys and values;
b) return the key with the max value"""...
How do I show the value of a #define at compile-time?
... reflect the revised terminology. (Both terms, incidentally, are equally detestable. The correct term is, of course, stringifaction. Be ready to update your links.)) operator. This acts only on the arguments of a macro and replaces the unexpanded argument with the argument enclosed in double quotes....
Why is using 'eval' a bad practice?
...r a legitimate use-case for using eval, one that is found even in CPython: testing.
Here's one example I found in test_unary.py where a test on whether (+|-|~)b'a' raises a TypeError:
def test_bad_types(self):
for op in '+', '-', '~':
self.assertRaises(TypeError, eval, op + "b'a'")
...
How to validate an e-mail address in swift?
...
wouldn't return emailTest.evaluateWithObject(testStr) be a lot more simpler and readable? Comparing to == true is a bit like Javascript.
– Sulthan
Aug 24 '14 at 11:55
...
Remove not alphanumeric characters from string
....g.:
input.replace(/[^0-9a-z]/gi, '')
The input is malformed
Since the test string contains various escaped chars, which are not alphanumeric, it will remove them.
A backslash in the string needs escaping if it's to be taken literally:
"\\test\\red\\bob\\fred\\new".replace(/\W/g, '')
"testredb...
Stack smashing detected
...** stack smashing detected ***: ./a.out terminated
Aborted (core dumped)
Tested on Ubuntu 16.04, GCC 6.4.0.
Disassembly
Now we look at the disassembly:
objdump -D a.out
which contains:
int main (void){
400579: 55 push %rbp
40057a: 48 89 e5 ...
Django dynamic model fields
...ill Hardy's talk at DjangoCon 2011 (watch it!) are nevertheless robust and tested in production (relevant source code).
First to implement this was Michael Hall.
Yes, this is magic, with these approaches you can achieve fully dynamic Django apps, models and fields with any relational database back...