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How to delete duplicates on a MySQL table?
...
Doesn't seem to work with InnoDB. I ran ALTER TABLE foo ENGINE MyISAM to work around it, changed the engine back after.
– Martin
Jul 17 '13 at 23:06
13
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How to call a parent class function from derived class function?
...uate it by adding the base class's name followed by two colons base_class::foo(...). You should note that unlike Java and C#, C++ does not have a keyword for "the base class" (super or base) since C++ supports multiple inheritance which may lead to ambiguity.
class left {
public:
void foo();
};...
Kotlin: how to pass a function as parameter to another?
Given function foo :
10 Answers
10
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C# pattern to prevent an event handler hooked twice [duplicate]
...Linq; // Required for the .Contains call below:
...
private EventHandler foo;
public event EventHandler Foo
{
add
{
if (foo == null || !foo.GetInvocationList().Contains(value))
{
foo += value;
}
}
remove
{
foo -= value;
}
}
Usin...
How to unset a JavaScript variable?
...o-op when the target isn't an object property. e.g.,
(function() {
var foo = 123;
delete foo; // wont do anything, foo is still 123
var bar = { foo: 123 };
delete bar.foo; // foo is gone
}());
But since global variables are actually members of the window object, it works.
When proto...
What use is find_package() if you need to specify CMAKE_MODULE_PATH anyway?
...ocated within your project. Something like this:
CMakeLists.txt
cmake/FindFoo.cmake
cmake/FindBoo.cmake
CMakeLists.txt content:
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
find_package(Foo REQUIRED) # FOO_INCLUDE_DIR, FOO_LIBRARIES
find_package(Boo REQUIRED) # BOO_INCLUDE_DI...
AngularJS : How to watch service variables?
...{
observerCallbacks.push(callback);
};
//call this when you know 'foo' has been changed
var notifyObservers = function(){
angular.forEach(observerCallbacks, function(callback){
callback();
});
};
//example of when you may want to notify observers
this.foo = someNgReso...
What is this crazy C++11 syntax ==> struct : bar {} foo {};?
...First, we'll take a bog-standard abstract UDT (User-Defined Type):
struct foo { virtual void f() = 0; }; // normal abstract type
foo obj;
// error: cannot declare variable 'obj' to be of abstract type 'foo'
Let's also recall that we can instantiate the UDT at the same time that we define it:
str...
AngularJS: ng-show / ng-hide not working with `{{ }}` interpolation
...
The foo.bar reference should not contain the braces:
<p ng-hide="foo.bar">I could be shown, or I could be hidden</p>
<p ng-show="foo.bar">I could be shown, or I could be hidden</p>
Angular expressions n...
Which is preferred: Nullable.HasValue or Nullable != null?
...nd to always use !=null
And this is why:
Let imagine we have some class Foo with a nullable double variable SomeDouble
public class Foo
{
public double? SomeDouble;
//some other properties
}
If somewhere in our code we want to get all Foo with a non null SomeDouble values from a col...