大约有 47,000 项符合查询结果（耗时：0.0620秒） [XML]
List all the files that ever existed in a Git repository
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This is a simplified variation of Strager's solution:
git log --pretty=format: --name-status | cut -f2- | sort -u
Edit: Thanks to Jakub for teaching me a bit more in the comments, this version has a shorter pipeline and gives git more opportunity to get things right.
git log --pretty=format: ...
Get exception description and stack trace which caused an exception, all as a string
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See the traceback module, specifically the format_exc() function. Here.
import traceback
try:
raise ValueError
except ValueError:
tb = traceback.format_exc()
else:
tb = "No error"
finally:
print tb
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Import a file from a subdirectory?
...6)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from lib import BoxTime
>>> BoxTime.foo()
foo!
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Batch files - number of command line arguments
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Googling a bit gives you the following result from wikibooks:
set argC=0
for %%x in (%*) do Set /A argC+=1
echo %argC%
Seems like cmd.exe has evolved a bit from the old DOS days :)
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【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...et, struct socket *sock, int protocol,
int kern)
{
...
list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { //inet_init->inet_register_protosw, inetsw_array
err = 0;
/* Check the non-wild match. */
if (protocol == answer->protocol) {
if (protocol != IPPROTO_IP)
...
C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
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// collect in-use pointers
std::unordered_set<T *> in_use;
for (auto p = head_list_.load(std::memory_order_acquire); p; p = p->next_) {
in_use.insert(p->target_);
}
// delete useless pointers
List *retire_head = nullptr;
List *retire_tail = nullptr;
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StringBuilder vs String concatenation in toString() in Java
...it is shorter and the compiler will in fact turn it into version 2 - no performance difference whatsoever.
More importantly given we have only 3
properties it might not make a
difference, but at what point do you
switch from concat to builder?
At the point where you're concatenating in a...
Why is it slower to iterate over a small string than a small list?
...fference is closer to 70% (or more) once a lot of the overhead is removed, for Python 2.
Object creation is not at fault. Neither method creates a new object, as one-character strings are cached.
The difference is unobvious, but is likely created from a greater number of checks on string indexing, w...
'printf' vs. 'cout' in C++
... that std::cout is way better than printf, even if the question just asked for differences. Now, there is a difference - std::cout is C++, and printf is C (however, you can use it in C++, just like almost anything else from C). Now, I'll be honest here; both printf and std::cout have their advantage...
snprintf and Visual Studio 2010
I'm unfortunate enough to be stuck using VS 2010 for a project, and noticed the following code still doesn't build using the non-standards compliant compiler:
...