Remember that arguments are passed on the stack. The va_start function contains the “magic” code to initialize the va_list with the correct stack pointer. It must be passed the last named argument in the function declaration or it will not work. What va_arg does is use this saved stack pointer, and extract the correct amount … Read more
From the JEP docs itself – Description – These will include varargs overloads, so that there is no fixed limit on the collection size. However, the collection instances so created may be tuned for smaller sizes. Special-case APIs (fixed-argument overloads) for up to ten of elements will be provided. While this introduces some clutter in … Read more
Mockito 1.8.1 introduced anyVararg() matcher: when(a.b(anyInt(), anyInt(), Matchers.<String>anyVararg())).thenReturn(b); Also see history for this: https://code.google.com/archive/p/mockito/issues/62 Edit new syntax after deprecation: when(a.b(anyInt(), anyInt(), ArgumentMatchers.<String>any())).thenReturn(b);
With params you can call your method like this: addTwoEach(1, 2, 3, 4, 5); Without params, you can’t. Additionally, you can call the method with an array as a parameter in both cases: addTwoEach(new int[] { 1, 2, 3, 4, 5 }); That is, params allows you to use a shortcut when calling the method. … Read more
It is hard to give a static type to the apply function, since its type depends on the type of the (possibly heterogeneous) list argument. There are at least two ways one way to write this function in Haskell that I can think of: Using reflection We can defer type checking of the application until … Read more
void Error(const char* format, …) { va_list argptr; va_start(argptr, format); vfprintf(stderr, format, argptr); va_end(argptr); } If you want to manipulate the string before you display it and really do need it stored in a buffer first, use vsnprintf instead of vsprintf. vsnprintf will prevent an accidental buffer overflow error.
You can’t do it directly; you have to create a function that takes a va_list: #include <stdarg.h> static void exampleV(int b, va_list args); void exampleA(int a, int b, …) // Renamed for consistency { va_list args; do_something(a); // Use argument a somehow va_start(args, b); exampleV(b, args); va_end(args); } void exampleB(int b, …) { va_list args; … Read more
When using spread, you are expanding a single variable into more: var abc = [‘a’, ‘b’, ‘c’]; var def = [‘d’, ‘e’, ‘f’]; var alpha = [ …abc, …def ]; console.log(alpha)// alpha == [‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’]; When using rest arguments, you are collapsing all remaining arguments of a function into one array: … Read more
Splatting is not in the language yet, as confirmed by the devs. Workaround for now is to use an overload or wait if you cannot add overloads.
ES6 using rest parameters If you are able to use ES6 you can use: Rest Parameters function sortArgs(…args) { return args.sort(function (a, b) { return a – b; }); } document.body.innerHTML = sortArgs(12, 4, 6, 8).toString(); As you can read in the link The rest parameter syntax allows us to represent an indefinite number of … Read more