大约有 20,000 项符合查询结果（耗时：0.0300秒） [XML]
How many GCC optimization levels are there?
...lear on the man page.
We shall conclude that:
anything above -O3 up to INT_MAX is the same as -O3, but that could easily change in the future, so don't rely on it.
GCC 5.1 runs undefined behavior if you enter integers larger than INT_MAX.
the argument can only have digits, or it fails gracefully. I...
What are the differences between type() and isinstance()?
...ne is not better; they are for different things.
– EL_DON
Apr 30 '17 at 2:30
Please can you tell me - why have you use...
Why can't I use the 'await' operator within the body of a lock statement?
....Tasks;
public class SemaphoreLocker
{
private readonly SemaphoreSlim _semaphore = new SemaphoreSlim(1, 1);
public async Task LockAsync(Func<Task> worker)
{
await _semaphore.WaitAsync();
try
{
await worker();
}
finally
{...
Does C# have extension properties?
...{
private static readonly ConditionalWeakTable<Person, Employee> _employees =
new ConditionalWeakTable<Person, Employee>();
public decimal Salary
{
get
{
// `this` is the instance of Person
return _employees.GetOrCreate(this...
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
...n value").
Note: Git 2.25.1 (Feb. 2020) proposes in commit 9c8a294:
empty_tree=$(git mktree </dev/null)
# Windows:
git mktree <NUL
And adds:
As a historical note, the function now known as repo_read_object_file() was taught the empty tree in 346245a1bb ("hard-code the empty tree object...
Quora如何在快速开发中保持高品质代码 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...模块/目录等级的代码“ownership”上添加标签，例如：
__reviewer__ = 'vanessa, kornel'
如果提交新变更，系统就自动会分析文件（或其上层目录），将新审查者的名字添加到提交数据中。我们还有额外的规则将代码审核派发给合适的...
How do I declare class-level properties in Objective-C?
...natomic' version? Also i would consider naming the backing variables with '_' as is default by apple and also improves readability since returning/setting self.value from the getter/setter causes infinite recursion. In my opinion this is the right answer.
– Peter Segerblom
...
Log4net rolling daily filename with date in the file name
...up using (note the '.log' filename and the single quotes around 'myfilename_'):
<rollingStyle value="Date" />
<datePattern value="'myfilename_'yyyy-MM-dd"/>
<preserveLogFileNameExtension value="true" />
<staticLogFileName value="false" />
<file type="log4net.Uti...
Create directories using make file
...
This would do it - assuming a Unix-like environment.
MKDIR_P = mkdir -p
.PHONY: directories
all: directories program
directories: ${OUT_DIR}
${OUT_DIR}:
${MKDIR_P} ${OUT_DIR}
This would have to be run in the top-level directory - or the definition of ${OUT_DIR} would h...
Creating functions in a loop
...cated way which involved using a closure as a "function factory":
def make_f(i):
def f():
return i
return f
and in your loop use f = make_f(i) instead of the def statement.
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