Node.js: How to programmatically determine asynchronous?

Question

I\'d like to be able to take a function that doesn\'t take a callback and determine if it will execute asynchronously.

In particular, I\'m working with Node.js on th

Answer 1

This is not exactly a solution, just a hint on cases which might be indeed a solution.

Many franeworks or libraries, define functions which can work either synchronously or asynchronously, depending on whether the last function argument (the callback) is given.

For example:

function dummy_sync_or_async(data, callback)
{
  if (callback)
  { 
     // call async code
     //..
     callback(result);
  }
  else
  {
    // call sync code
    // ..
    return result;
  } 
}

Then one can check the number of arguments received (for example if working as a proxy to these function methods) and check these against the function signature (i.e function.length)

Then one can decide whether the function is called in sync or async mode.