Use a “closure”: $(edit_link).click(function(){ return changeViewMode(myvar); }); This creates an anonymous temporary function wrapper that knows about the parameter and passes it to the actual callback implementation.
Firefox interprets function statements differently and apparently they broke declaration hoisting for the function declaration. ( A good read about named functions / declaration vs expression ) Why does Firefox interpret statements differently is because of the following code: if ( true ) { function test(){alert(“YAY”);} } else { function test(){alert(“FAIL”);} } test(); // should … Read more
How about this: def test(): exec (code, globals()) f()
With default parameter values added in ES2015, you can declare default values for the parameters, and when making the call, if you pass undefined as the first parameter, it will get the default: function test(a = “ay”, b = “bee”) { console.log(`a = ${a}, b = ${b}`); } test(); // “a = ay, b = … Read more
You can always pass a dictionary as an argument to a function. For instance, dict = {‘a’:1, ‘b’:2} def myFunc(a=0, b=0, c=0): print(a,b,c) myFunc(**dict)
Dan Saks wrote about this in 1995, during the lead up to C++ standardisation: The committees decided that functions such as this, that accept a pointer or reference to an array with unknown bound, complicate declaration matching and overload resolution rules in C++. The committees agreed that, since such functions have little utility and are … Read more
I’m sure this question has been asked several times before, but I can’t find the link. $.fn points to the jQuery.prototype. Any methods or properties you add to it become available to all instance of the jQuery wrapped objects. $.something adds a property or function to the jQuery object itself. Use the first form $.fn.something … Read more
Covariance and contravariance are qualities of the class not qualities of the parameters. (They are qualities that depend on the parameters, but they make statements about the class.) So, Function1[-A,+B] means that a function that takes superclasses of A can be viewed as a subclass of the original function. Let’s see this in practice: class … Read more
From Scoping rules for importing The use keyword must be declared in the outermost scope of a file (the global scope) or inside namespace declarations. This is because the importing is done at compile time and not runtime, so it cannot be block scoped So you should put like this, use should specified at the … Read more
It’s all because OpenCV uses Automatic Memory Management. OpenCV handles all the memory automatically. First of all, std::vector, Mat, and other data structures used by the functions and methods have destructors that deallocate the underlying memory buffers when needed. This means that the destructors do not always deallocate the buffers as in case of Mat. … Read more