大约有 12,000 项符合查询结果（耗时：0.0163秒） [XML]
Why can't non-default arguments follow default arguments?
...ink that the algorithm at PEP 3102 could work exactly the same even if def foo(x=None, y) would be allowed. So I'm still curious why this is not allowed by Python. Is there a real fundamental reason or is it just "we don't allow it because we don't allow it".
– Jeroen Demeyer
...
How to use > in an xargs command?
... needs recursion and a simple loop with a glob for everything else:
find /foo -exec sh -c 'grep "$1" > "$1.out"' -- {} \;
or non-recursive:
for file in *; do grep "$file" > "$file.out"; done
Notice the proper use of quotes.
...
What's wrong with cplusplus.com?
...ple... there is no undefined behavior.
– Dennis Zickefoose
Jun 29 '11 at 16:27
1
You declared "Ma...
How to align checkboxes and their labels consistently cross-browsers
...I disagree with the suggestion about using conditional comments. Keep the *foobar CSS hack. That works well, is used by frameworks like YUI, and allows you to keep together what belongs together.
– ebruchez
Jan 30 '09 at 17:54
...
How to return smart pointers (shared_ptr), by reference or by value?
... to return a shared_ptr is to simply return by value:
shared_ptr<T> Foo()
{
return shared_ptr<T>(/* acquire something */);
};
This is a dead-obvious RVO opportunity for modern C++ compilers. I know for a fact that Visual C++ compilers implement RVO even when all optimizations are ...
Modifying a query string without reloading the page
... these mean you can do something simple like history.pushState(null, '', '/foo?bar=true') if your new url is on the same host/port.
– Blaskovicz
Nov 2 '16 at 19:38
...
Synchronization vs Lock
...ization ensures fair or FIFO allocation of the lock. Using
synchronized(foo) {
}
or
lock.acquire(); .....lock.release();
does not assure fairness.
If you have lots of contention for the lock you can easily encounter barging where newer requests get the lock and older requests get stuck. I'...
Automapper - how to map to constructor parameters instead of property setters
...nstructUsing((src, res) =>
{
return new ToType(
foo: src.MyFoo,
bar: res.Mapper.Map<BarModel>(src.MyBar),
);
});
Note the Func's 2nd parameter res which is the Resolution Context. This parameter allows you to use already registered mappings.
...
What is the difference between String and string in C#?
...xplicitly specifying an enum's underlying type. For instance:
public enum Foo : UInt32 {} // Invalid
public enum Bar : uint {} // Valid
That's just a matter of the way the spec defines enum declarations - the part after the colon has to be the integral-type production, which is one token of sby...
Checking for a dirty index or untracked files with Git
...newly-created empty files. You can try it in any clean working tree: touch foo && git diff --shortstat
– Campadrenalin
Aug 5 '14 at 15:37
...