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Didn't Java once have a Pair class? [duplicate]
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There is no Pair in the standard framework, but the Apache Commons Lang, which comes quite close to “standard”, has a Pair.
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When should std::move be used on a function return value? [duplicate]
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met save for the fact that the source object is a function parameter,
and the object to be copied is designated by an lvalue, overload
resolution to select the constructor for the copy is first performed as
if the object were designated by an rvalue.
return foo; is a case of NRVO, so cop...
Removing fields from struct or hiding them in JSON Response
...hat, upon being called, performs a query, creates an instance of a struct, and then encodes that struct as JSON before sending back to the caller. I'd now like to allow the caller to be able to select the specific fields they would like returned by passing in a "fields" GET parameter.
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Transform DateTime into simple Date in Ruby on Rails
...at .to_date() is not present in standard ruby so we have to do workaround. Converting from DateTime to Date with correct timezone trough string (!!!) is not elegant. Understanding the internals of the DateTime and Date is not easy. Just rampaging, ignore! :-)
– Notinlist
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CListCtrl 如何设置单元格颜色？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...ColListCtrl.InitCtrl(&Head, &Cols);
//添加数据
CString Linetitle;
int pos=0;
for (int x=0; x<10;x++)
{
Head.RemoveAll();
Linetitle.Format("Line %d",x);
Head.Add(Linetitle);
Linetitle.Format("SubLine %d-1",x);
Head.Add(Linetitle);
Linetitle.Format("SubLine %d-2",x);
Head.Add(...
c/c++ volatile和mutable关键字 - C/C++ - 清泛网 - 专注C/C++及内核技术
...olatile 吗？解释为什么。
3); 下面的函数有什么错误：
int square(volatile int *ptr)
{
return *ptr * *ptr;
}
下面是答案：
1)是的。一个例子是只读的状态寄存器。它是volatile因为它可能被意想不到地改变。它是const因为程序不应该...
shared_ptr指针被赋值后，原指针会引用清零、自动释放。 - C/C++ - 清泛IT...
...赋值后，原指针会引用清零、自动释放。
std::shared_ptr<int> intg;
void foo(std::shared_ptr<int> p)
{
intg = p; // 原指针释放，存储新的智能指针
//*(intg.get()) = *(p.get...
How to get the current time in milliseconds from C in Linux?
...amp;spec);
s = spec.tv_sec;
ms = round(spec.tv_nsec / 1.0e6); // Convert nanoseconds to milliseconds
if (ms > 999) {
s++;
ms = 0;
}
printf("Current time: %"PRIdMAX".%03ld seconds since the Epoch\n",
(intmax_t)s, ms);
}
If your goal is to measure...
How to Create a circular progressbar in Android which rotates on it?
... creating a layer-list, I separated it into two files. One for ProgressBar and one for its background.
This is the ProgressDrawable file (@drawable folder): circular_progress_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
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How to make an HTTP POST web request
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request.Method = "POST";
// Create POST data and convert it to a byte array.
string postData = "This is a test that posts this string to a Web server.";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Set the ContentType property ...