Array parameter in Javascript

Question

How I can to define array parameter in javascript function. For example in c# I can just like this.

private void myFunc(params object[] values){

}

You want to specify that a particular argument passed to a function is, by default, an Array? — David Thomas, Mar 29 '18 at 10:00
In javascript you cant specify parameter type, simply do `var func = function(array){}` And then you have to take care that `array` is of type `Array`. http://no.gd/p/untyped-20120205-235300.jpg — bladekp, Mar 29 '18 at 10:01
I'd like to call function like this myFunc("1","2","n") and retrieve data in function via foreach() — Adil, Mar 29 '18 at 10:18
Ok, so this is an [XY problem](http://xyproblem.info/). *Ask about your real problem, not about the supposed solution*. If you want to pass in an array, then pass an array, not three separate values. `myFunc( ["1","2","n"] )` — JJJ, Mar 29 '18 at 10:22

score 1 · Answer 1 · answered Mar 29 '18 at 10:00

JavaScript is dynamically typed. Any argument can be passed an array. There is no special syntax to declare it.

function example(my_argument) {
    if (my_argument instanceof Array) {
       console.log(my_argument, "is an array");
    } else {
       console.log(my_argument, "is not an array");
    }
}

example([1,2,3]);
example("a string");

score 0 · Answer 2 · answered Mar 29 '18 at 10:03

You don't specify type of argument in Javascript, it's dynamically typed language. In case you want to check explicitly type of argument then you can do something like:

function(arg1) {
    if (typeof arg1 !== 'object') {
        throw new Error('Invalid type of argument');
    }
}

Also take a look at this answer.

Array parameter in Javascript

2 Answers2