Passing variable number of arguments from one function to another [duplicate]

Answer 1

you need to use the apply function.. here is how u do it:

function variableFunction1()  
    {  

   alert("variableFunction1 arguments length: " + arguments.length);  

   // calls second varargs function keeping current 'this'.  
   variableFunction2.apply(this, arguments);  
}  

function variableFunction2()  
{  

   alert("variableFunction2 arguments length: " + arguments.length);  
}  

variableFunction1('a','b','c');  

Demo

Answer 2

You can in fact do this with apply, if I understand your question correctly:

function show(foo, bar) { window.alert(foo+' '+bar); }
function run(f, args) { f.apply(null,args); } 
run(show, ['foo', 'bar']);

Answer 3

In your example to pass variable arguments to show this works

function show(foo, bar) { window.alert(foo+' '+bar); }
function run(f) { f.apply(null, Array().slice.call(arguments, 1)); }
run(show, 'foo', 'bar');  

Answer 4

The main way to pass a programmatically generated set of arguments to a function is by using the function's 'apply' method.

function show(foo, bar) {
  window.alert(foo+' '+bar);
}
function run(f) {
  // use splice to get all the arguments after 'f'
  var args = Array.prototype.splice.call(arguments, 1);
  f.apply(null, args);
}

run(show, 'foo', 'bar');