The return type must be determined at compile-time. You might use std::common_type (since C++11): For arithmetic types not subject to promotion, the common type may be viewed as the type of the (possibly mixed-mode) arithmetic expression such as T0() + T1() + … + Tn(). template < typename T, typename X> typename std::common_type<T, X>::type Max_Number … Read more
I have a struct that contains a declaration like this one: No you don’t. That’s a syntax error. You’re looking for: void (*functions[256])(); Which is an array of function pointers. Note, however, that void func() isn’t a “function that takes no arguments and returns nothing.” It is a function that takes unspecified numbers or types … Read more
Your choices are ALTERNATIVE 1 You can use templates template <typename T> T myfunction( T t ) { return t + t; } ALTERNATIVE 2 Plain function overloading bool myfunction(bool b ) { } int myfunction(int i ) { } You provide a different function for each type of each argument you expect. You can … Read more
Difference between Predicate<T> and Function<T, R> First and foremost a Predicate<T> is strictly a boolean-valued function: _ _ _ _ _ _ _ | | T –> | predicate | –> boolean |_ _ _ _ _ _ _| Whereas this is not necessarily true for a Function<T, R>: _ _ _ _ _ _ … Read more
You can use $MyInvocation which contains some useful information about what is currently executed. function foo { ‘This function is called {0}.’ -f $MyInvocation.MyCommand }
bind returns a function which will act like the original function but with this predefined. It is usually used when you want to pass a function to an event handler or other async callback. call and apply will call a function immediately letting you specify both the value of this and any arguments the function … Read more
import time try: time.sleep(10) finally: print “clean up” clean up Traceback (most recent call last): File “<stdin>”, line 2, in <module> KeyboardInterrupt If you need to catch other OS level interrupts, look at the signal module: http://docs.python.org/library/signal.html Signal Example from signal import * import sys, time def clean(*args): print “clean me” sys.exit(0) for sig in … Read more
Thanks RASG for https://stackoverflow.com/a/3211647/982924 Async function with callback: function async(u, c) { var d = document, t=”script”, o = d.createElement(t), s = d.getElementsByTagName(t)[0]; o.src=”https://” + u; if (c) { o.addEventListener(‘load’, function (e) { c(null, e); }, false); } s.parentNode.insertBefore(o, s); } Usage: async(‘snapabug.appspot.com/snapabug.js’, function() { SnapABug.init(‘XXXXX-XXXXX-XXXXX-XXXXX-XXXXX’); }); jsFiddle
There is a difference in the * usage when you are defining a variable and when you are using it. In declaration, int *myVariable; Means a pointer to an integer data type. In usage however, *myVariable = 3; Means dereference the pointer and make the structure it is pointing at equal to three, rather then … Read more