大约有 6,800 项符合查询结果（耗时：0.0226秒） [XML]
Recursive lambda functions in C++11
...n slower code. But not always. Have a look at the answers to std::function vs template
This is not just a peculiarity about C++,
it's directly mapping to the mathematics of lambda calculus. From Wikipedia:
Lambda calculus cannot express this as directly as some other notations:
all functions ar...
Excluding directories in os.walk
...y, given that the intent is to exclude directories, at the cost of O(n**2) vs O(n) time.
(Making a copy of the dirs list with list(dirs) is required for correct execution)
# exclude = set([...])
for root, dirs, files in os.walk(top, topdown=True):
[dirs.remove(d) for d in list(dirs) if d in e...
Dynamic LINQ OrderBy on IEnumerable / IQueryable
I found an example in the VS2008 Examples for Dynamic LINQ that allows you to use a sql-like string (e.g. OrderBy("Name, Age DESC")) for ordering. Unfortunately, the method included only works on IQueryable<T> . Is there any way to get this functionality on IEnumerable<T> ?
...
Aligning UIToolBar items
...tagged iPhone. Therefore my answer is valid. It's also good to contrast c# vs obj-c. Clearly, c# is modern, slimmer, nicer, faster and superior in every way.
– Herman Schoenfeld
Aug 1 '13 at 2:31
...
Why should I use Google's CDN for jQuery?
...ragmentation in CDN providers, jQuery versions, and
protocol usage (http vs. https), the chances of getting a CDN cache
hit are shockingly low – and downloading from an external domain has
the potential to perform not one, but three round trips (a DNS lookup,
a TCP connection, and an HTTP ...
extra qualification error in C++
... @altumano: Is it this thing github.com/VioletGiraffe/cppcheck-vs-addin ? If so could you please report the bug - that project is quite alive and there's good chance it will be fixed.
– sharptooth
Mar 6 '15 at 11:28
...
Why CancellationToken is separate from CancellationTokenSource?
... design allows the two
key operations (initiating a cancellation request vs. observing and
responding to cancellation) to be cleanly separated. In particular,
methods that take only a CancellationToken can observe a cancellation
request but cannot initiate one.
Link: .NET 4 Cancellation Fr...
Does making a struct volatile make all its members volatile?
...
From: http://msdn.microsoft.com/en-us/library/145yc477%28v=vs.80%29.aspx
To declare the object pointed to by the pointer as const or volatile, use a declaration of the form:
const char *cpch;
volatile char *vpch;
To declare the value of the pointer — that is, the actual addres...
Check if any ancestor has a class using jQuery
...parents to be found, parents() is faster than closest() jsperf.com/closest-vs-parents-foobar
– Alex
May 7 '14 at 7:42
...
Is there a concise way to iterate over a stream with indices in Java 8?
... work. You can't have different segments of a pipeline running in parallel vs sequential. Only the last of parallel or sequential is honored when the terminal operation commences.
– Stuart Marks
Aug 15 '14 at 22:03
...