function
Are these compatible function types in C?
These two defect reports address your issue: Defect Report #316 Defect Report #317 Defect report 316 says (emphasis mine going forward): The rules for compatibility of function types in 6.7.5.3#15 do not define when a function type is “specified by a function definition that contains a (possibly empty) identifier list”, […] and it has a … Read more
Pass unknown number of parameters to JS function [duplicate]
What you want is probably Function.prototype.apply(). Usage: var params = [param1, param2, param3]; functiona.apply(this, params); As others noted, functiona declaration may use arguments, e.g.: function functiona() { var param1 = this.arguments[0]; var param2 = this.arguments[1]; } But it can use any number of normal parameters as well: function foo(x, y) { console.log(x); } foo.apply(this, [10, … Read more
How to multiply functions in python?
You can use your hack class as a decorator pretty much as it’s written, though you’d likely want to choose a more appropriate name for the class. Like this: class Composable(object): def __init__(self, function): self.function = function def __call__(self, *args, **kwargs): return self.function(*args, **kwargs) def __mul__(self, other): @Composable def composed(*args, **kwargs): return self.function(other(*args, **kwargs)) return … Read more
Why can’t I use a Javascript function before its definition inside a try block?
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
What is the difference between functions in math and functions in programming?
In functional programming you have Referential Transparency, which means that you can replace a function with its value without altering the program. This is true in Math too, but this is not always true in Imperative languages. A math function is defined by: a relationship that maps elements from one set (A) to another (B), … Read more
How to pass arguments to the __code__ of a function?
I am completely against this use of __code__. Although I am a curious person, and this is what someone theoretically could do: code # This is your code object that you want to execute def new_func(eggs): pass new_func.__code__ = code new_func(‘eggs’) Again, I never want to see this used, ever. You might want to look … Read more
How does this object method definition work without the “function” keyword?
How is it possible that this runs at all in any browser? Is is some sort of new ES6 functionality? Yes. … Method definitions A property of an object can also refer to a function or a getter or setter method. var o = { property: function ([parameters]) {}, get property() {}, set property(value) {}, … Read more
itertools.ifilter Vs. filter Vs. list comprehensions
Your understanding is correct: the only difference is that ifilter returns an iterator, while using filter is like calling: list(ifilter(…)) You may also be interested in what PEP 289 says about filter and ifilter: List comprehensions greatly reduced the need for filter() and map(). Likewise, generator expressions are expected to minimize the need for itertools.ifilter() … Read more
How can I make the default value of an argument depend on another argument (in Python)?
The language doesn’t support such syntax. The usual workaround for these situations(*) is to use a default value which is not a valid input. def func(n=5.0, delta=None): if delta is None: delta = n/10 (*) Similar problems arise when the default value is mutable.