Question

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Passing arbitrary number of parameter to a function in javascript

How to create an arbitrary function in JavaScript? You know, like Math.min(x1,x2…xn). It can have infinite arguments. I tried to make it like this:

function arbfun(x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x20){...}

Thats not realy infinite is it?

Answer 1

You need to access the variable arguments from within the function:

function foo() {
  alert("Called with " + arguments.length + " arguments!");

  for(var i = 0; i < arguments.length; i++) {
    alert(arguments[i]);
  }
}

See it in action.