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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
Excel RTD(Excel Real-Time Data)实时刷新数据技术从Excel 2002开始，微软提供了一种叫做Excel RTD（real-time data）的技术，使用该技术可以在Excel中实时查看和更新数据。RTD采用所谓的...从Excel 2002开始，微软提供了一种叫做Excel RTD（real-time d...
一个故事告诉你比特币的原理及运作机制 - 创意 - 清泛网 - 专注C/C++及内核技术
一个故事告诉你比特币的原理及运作机制bitcoin-mechanism-make-easy周末花时间看了一些比特币原理相关的资料，虽然不敢说把每个细节都完全搞懂了，不过整体思路和关键部分的主要原理还是比较明白。写一篇文章...周末花时间看了...
汇编语言超浓缩教程（汇编入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
汇编语言超浓缩教程（汇编入门必备） 哎哟，哥们儿，还捣鼓汇编呢？那东西没用，兄弟用VB"钓"一个API就够你忙活个十天半月的，还不一定搞出来。此君之言倒也不虚，那吾等还有...“ 哎哟，哥们儿，还捣鼓汇编呢？那东西没...
No Exception while type casting with a null in java
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You can cast null to any reference type without getting any exception.
The println method does not throw null pointer because it first checks whether the object is null or not. If null then it simply prints the string "null". Otherw...
How to check SQL Server version
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declare @sqlVers numeric(4,2)
select @sqlVers = left(cast(serverproperty('productversion') as varchar), 4)
Gives 8.00, 9.00, 10.00 and 10.50 for SQL 2000, 2005, 2008 and 2008R2 respectively.
Also, Try the system extended procedure xp_msver. You can call this stored procedure...
TypeScript: casting HTMLElement
Does anyone know how to cast in TypeScript?
13 Answers
13
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How expensive is RTTI?
...me if you can afford to do
if (typeid(a) == typeid(b)) {
B* ba = static_cast<B*>(&a);
etc;
}
instead of
B* ba = dynamic_cast<B*>(&a);
if (ba) {
etc;
}
The former involves only one comparison of std::type_info; the latter necessarily involves traversing an inheritance...
Cast from VARCHAR to INT - MySQL
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As described in Cast Functions and Operators:
The type for the result can be one of the following values:
BINARY[(N)]
CHAR[(N)]
DATE
DATETIME
DECIMAL[(M[,D])]
SIGNED [INTEGER]
TIME
UNSIGNED [INTEGER]
Therefore,...
How to automatically convert strongly typed enum into int?
...rted into integer type, while strongly typed enums can not do it without a cast.
11 Answers
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C++ convert hex string to signed integer
...gt;> x;
// output it as a signed type
std::cout << static_cast<int>(x) << std::endl;
}
In the new C++11 standard, there are a few new utility functions which you can make use of! specifically, there is a family of "string to number" functions (http://en.cppreference.co...