Is it possible to send a variable number of arguments to a JavaScript function, from an array? var arr = [‘a’,’b’,’c’] var func = function() { // debug alert(arguments.length); // for(arg in arguments) alert(arg); } func(‘a’,’b’,’c’,’d’); // prints 4 which is what I want, then ‘a’,’b’,’c’,’d’ func(arr); // prints 1, then ‘Array’ I’ve recently written … Read more
I’m afraid of varargs. I don’t know what to use them for. Plus, it feels dangerous to let people pass as many arguments as they want. What’s an example of a context that would be a good place to use them? 8 Answers 8
Basically I have an ArrayList of locations: ArrayList<WorldLocation> locations = new ArrayList<WorldLocation>(); below this I call the following method: .getMap(); the parameters in the getMap() method are: getMap(WorldLocation… locations) The problem I’m having is I’m not sure how to pass in the WHOLE list of locations into that method. I’ve tried .getMap(locations.toArray()) but getMap doesn’t … Read more
I’d like to be able to create a function like: class A { private String extraVar; public String myFormat(String format, Object … args){ return String.format(format, extraVar, args); } } The problem here is that args is treated as Object[] in the method myFormat, and thus is a single argument to String.format, while I’d like every … Read more
Say I have a C function which takes a variable number of arguments: How can I call another function which expects a variable number of arguments from inside of it, passing all the arguments that got into the first function? Example: void format_string(char *fmt, …); void debug_print(int dbg_lvl, char *fmt, …) { format_string(fmt, /* how … Read more
I know this is a basic question, but I couldn’t find an answer. Why use it? if you write a function or a method that’s using it, when you remove it the code will still work perfectly, 100% as without it. E.g: With params: static public int addTwoEach(params int[] args) { int sum = 0; … Read more
How can I write a function that accepts a variable number of arguments? Is this possible, how? 18 Answers 18
Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. Answers without enough detail may be edited or deleted. The arguments object in JavaScript is an odd wart—it acts just like an array in most situations, but it’s not actually an array object. … Read more
I understand this occurs with Java 7 when using varargs with a generic type; But my question is.. What exactly does Eclipse mean when it says “its use could potentially pollute the heap?” And How does the new @SafeVarargs annotation prevent this? 6 s 6 Heap pollution is a technical term. It refers to references … Read more
I’m trying to combine the slice [1, 2] and the slice [3, 4]. How can I do this in Go? I tried: append([]int{1,2}, []int{3,4}) but got: cannot use []int literal (type []int) as type int in append However, the documentation seems to indicate this is possible, what am I missing? slice = append(slice, anotherSlice…) 9 … Read more
