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MySQL, update multiple tables with one query
I have a function that updates three tables, but I use three queries to perform this. I wish to use a more convenient approach for good practice.
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How do pointer to pointers work in C?
...act two-dimensional, since strings are character arrays. Hence: char **.
A function f will need to accept an argument of type t ** if it is to alter a variable of type t *.
Many other reasons that are too numerous to list here.
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Performance surprise with “as” and nullable types
...sible boxed enum types. The JIT compiler generates a call to a CLR helper function named JIT_Unbox_Nullable to get the job done. This is a general purpose function for any value type, lots of code there to check types. And the value is copied. Hard to estimate the cost since this code is locked ...
Is ServiceLocator an anti-pattern?
...you tried to get parallel tests working with static dependencies? It's not fun.
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Multiple inheritance/prototypes in JavaScript
...e can be achieved in ECMAScript 6 by using Proxy objects.
Implementation
function getDesc (obj, prop) {
var desc = Object.getOwnPropertyDescriptor(obj, prop);
return desc || (obj=Object.getPrototypeOf(obj) ? getDesc(obj, prop) : void 0);
}
function multiInherit (...protos) {
return Object.cr...
Understanding reference counting with Cocoa and Objective-C
...hat the returned string
// will still be valid for the caller of this function.
return [s autorelease];
}
I realize all of this is a bit confusing - at some point, though, it will click. Here are a few references to get you going:
Apple's introduction to memory management.
Cocoa Progra...
What's the best way to put a c-struct in an NSArray?
...structure myStruct is created on the stack and hence is destroyed when the function ends -- the array will contain a pointer to an object that is no longer there. You can work around this by using your own memory management routines -- hence why the option is provided to you -- but then you have to ...
C++ templates Turing-complete?
...cout << Factorial<4>::val << "\n";
}
That was a little fun but not very practical.
To answer the second part of the question:
Is this fact useful in practice?
Short Answer: Sort of.
Long Answer: Yes, but only if you are a template daemon.
To turn out good programming using t...
When to use nested classes and classes nested in modules?
...tern even for scripts, where the namespace isn't terribly needed, just for fun and practice...
#!/usr/bin/env ruby
class A
class Realwork_A
...
end
class Realwork_B
...
end
def run
...
end
self
end.new.run
...