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Why should I avoid std::enable_if in function signatures
...n a helper class) that receives a dummy argument based on the same compile-time condition that you use in the enable_if.
template<typename T>
T fun(T arg)
{
return detail::fun(arg, typename some_template_trait<T>::type() );
}
namespace detail {
template<typename T>
...
Why isn't sizeof for a struct equal to the sum of sizeof of each member?
...tly in the struct at fixed offsets. The compiler knows all this at compile time so the pointer is implicit. For example, if you have a struct variable of this type called s then &s.a == &s and &s.d == &s + 12 (given the alignment shown in the answer). The pointer is only stored if t...
Extracting text from HTML file using Python
... there is no mention of his death and it's of course frozen in 2012, as if time stopped or he took a very long vacation. Very disturbing.
– JulienFr
Sep 8 '17 at 23:18
...
A semantics for Bash scripts?
More than any other language I know, I've "learned" Bash by Googling every time I need some little thing. Consequently, I can patchwork together little scripts that appear to work. However, I don't really know what's going on, and I was hoping for a more formal introduction to Bash as a programmin...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
... the IL that actually executes, but rather native code built from it at runtime.
– Oskar Berggren
Feb 9 '13 at 12:07
2
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Unit testing code with a file system dependency
...ils to the test. This is bad because now you have to change the test every time you change the implementation details of your method because changing the implementation details breaks your test(s)!
Having bad tests is actually worse than having no tests at all.
In your example:
void DoIt(IZipper ...
Calling a JavaScript function named in a variable [duplicate]
...Space["functionName"]();
Avoid eval, and avoid passing a string in to setTimeout and setInterval. I write a lot of JS, and I NEVER need eval. "Needing" eval comes from not knowing the language deeply enough. You need to learn about scoping, context, and syntax. If you're ever stuck with an eval, j...
What is the type of lambda when deduced with “auto” in C++11?
... the type really unnamed, or is it just not given a name until compilation time? IOW, could one use RTTI to find the name the compiler decided upon?
– Ben
Oct 31 '11 at 19:17
3
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Difference between 'struct' and 'typedef struct' in C++?
... in the tag namespace.
You'd have to declare it as:
struct Foo x;
Any time you want to refer to a Foo, you'd always have to call it a struct Foo. This gets annoying fast, so you can add a typedef:
struct Foo { ... };
typedef struct Foo Foo;
Now struct Foo (in the tag namespace) and just pla...
Solutions for INSERT OR UPDATE on SQL Server
...ond updates the record. Adding a lock allow this to happen in a very short time-frame, preventing an error.
– Jean Vincent
Feb 29 '12 at 11:31
1
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