Javascript call function with variable number of arguments

I've recently written a lot of Python and it's a wonderful pattern to be able to accept varargs and send them. Is it possible in JavaScript to send an array to be treated as the arguments array?

Notice that null is used as the first argument of apply, that will set the this keyword to the Global object window inside func. Also note that the arguments object is not really an Array, you can convert it by:. You can actually pass as many values as you want to any javascript function. The explicitly named parameters will get the first few values, but ALL parameters will be stored in the arguments array.

To pass the arguments array in "unpacked" form, you can use apply, like so c. The splat and spread operators are part of ES6, the planned next version of Javascript.

So far only Firefox supports them. Note the awkard syntax for spread.

JavaScript variable number of arguments to function - Stack Overflow

You can find an ES6 compatibility table here. Note also the use of for The apply function takes two arguments; the object this will be binded to, and the arguments, represented with an array.

It's called the splat operator. You can do it in JavaScript using apply:. This is a sample program for calculating sum of integers for variable arguments and array on integers.

For those who were redirected here from Passing variable number of arguments from one function to another which should not be marked as a duplicate of this question:. If you're trying to pass a variable number of arguments from one function to another, since JavaScript 1. The first argument is the this parameter to use. Passing null will call the function from the global context, i.

According to this documentthe ECMAScript 5 specification redefined the apply method to take any "generic array-like object", instead of strictly an Array. Thus, you can directly pass the arguments list into the second function. Tested in Chrome Try it out with this JSFiddle. This object is built into functions, and it refers to, appropriately, the arguments of a function.

It is not technically an array, though, so typical array operations won't work on it. The suggested method is to use Array.

I've seen other answers mention using slice. Savage arms axis stocks prevents optimizations source: Forex trader jobs gauteng, I would argue that arguments is problematic because it hides what a function accepts yorkshire terrier puppies for sale in holland mi input.

Javascript: Forwarding function calls that take variable number of arguments - Stack Overflow

An arguments function typically is written like this:. Sometimes, the function header is written like the following to document the arguments in a C-like fashion:.

Arguments object - JavaScript | MDN

As for why it is problematic, take C, for example. ANSI C provides a facility for varargs Many people inadvertently declare functions with an unspecified arguments list int myfunction ;when they expect javascript call function with variable number of arguments function to take zero arguments. This is technically a bug because buy choate ultimate stock function will accept arguments.

Any number of them. It's pretty versatile, and can also be used in a function's argument-list "rest parameters" to specify varargs in a nicely documented fashion:.

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Stack Overflow is a community of 7. Join them; it only takes a minute: Is it possible to send a variable number of arguments to a JavaScript function? Is it possible to send a variable number of arguments to a JavaScript function, from an array?

Fire Crow 3, 3 25 Also note that the arguments object is not really an Array, you can convert it by: CMS k Thanks, apply does the trick, call in this case does not work. Yes, was a mistake! You can do it in JavaScript using apply: YoYoYonnY 5 The new let and const keywords ES declare block scope variables. Before ESthough, the variables should have still been hoisted to the top of the function as a matter of practice.

Don't use debug functions like alert. The function should be return ing a value, not alert ing it. I don't like the way you declare your functions. To demonstrate all of these critique points, here is an improved version of the function in your answer.

For those who were redirected here from Passing variable number of arguments from one function to another which should not be marked as a duplicate of this question: There are two methods as of ES The arguments Object This object is built into functions, and it refers to, appropriately, the arguments of a function. An arguments function typically is written like this: A proper varargs function in C takes the form: It is clean and self-documenting.

Braden Best 3, 1 17 Yes you can pass variable no. You can use apply to achieve this. V-rund Puro-hit 2, 4 12 Sign up or log in StackExchange.

javascript - How to write a JS function that accepts and "forwards" variable number of parameters? - Stack Overflow

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