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How can I check if a string is null or empty in PowerShell?
... null strings passed to a commandlet or function don't stay null. They get converted to empty strings. See the Microsoft Connect bug at connect.microsoft.com/PowerShell/feedback/details/861093/….
– JamieSee
Dec 11 '14 at 17:59
...
What is the purpose of willSet and didSet in Swift?
...
The point seems to be that sometimes, you need a property that has automatic storage and some behavior, for instance to notify other objects that the property just changed. When all you have is get/set, you need another field to ho...
What are the rules for calling the superclass constructor?
...rather than "super()".
class SuperClass
{
public:
SuperClass(int foo)
{
// do something with foo
}
};
class SubClass : public SuperClass
{
public:
SubClass(int foo, int bar)
: SuperClass(foo) // Call the superclass constructor in the...
Any idea why I need to cast an integer literal to (int) here?
...
The compiler tries to subtract 128 from (Integer) instead of casting -128 to Integer. Add () to fix it
Integer i3 = (Integer) -128; // doesn't compile
Integer i3 = (Integer) (-128); // compiles
According to BoltClock in the comments the cast to int works as inte...
How do I sort a list by different parameters at different timed
...parator implements Comparator<Person> {
ID_SORT {
public int compare(Person o1, Person o2) {
return Integer.valueOf(o1.getId()).compareTo(o2.getId());
}},
NAME_SORT {
public int compare(Person o1, Person o2) {
return o1.getFullName().comp...
编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...
...部的秘密--微软的编译器是如何解析Try/Catch/Throw的Compiler-Internals-How-Try-Catch-Throw-are-Interprpreted-by-the-Microsoft-Compiler编译器 解析 Try Catch Throw本文不是一篇介绍如何在x86架构上详细地实现异常处理(exception handling)的手册，只是一篇入...
编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...
...部的秘密--微软的编译器是如何解析Try/Catch/Throw的Compiler-Internals-How-Try-Catch-Throw-are-Interprpreted-by-the-Microsoft-Compiler编译器 解析 Try Catch Throw本文不是一篇介绍如何在x86架构上详细地实现异常处理(exception handling)的手册，只是一篇入...
编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...
...部的秘密--微软的编译器是如何解析Try/Catch/Throw的Compiler-Internals-How-Try-Catch-Throw-are-Interprpreted-by-the-Microsoft-Compiler编译器 解析 Try Catch Throw本文不是一篇介绍如何在x86架构上详细地实现异常处理(exception handling)的手册，只是一篇入...
编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...
...部的秘密--微软的编译器是如何解析Try/Catch/Throw的Compiler-Internals-How-Try-Catch-Throw-are-Interprpreted-by-the-Microsoft-Compiler编译器 解析 Try Catch Throw本文不是一篇介绍如何在x86架构上详细地实现异常处理(exception handling)的手册，只是一篇入...
编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...
...部的秘密--微软的编译器是如何解析Try/Catch/Throw的Compiler-Internals-How-Try-Catch-Throw-are-Interprpreted-by-the-Microsoft-Compiler编译器 解析 Try Catch Throw本文不是一篇介绍如何在x86架构上详细地实现异常处理(exception handling)的手册，只是一篇入...