pop array, if last element is function

popfun - pop function

The popfun Node.js module removes the last element from an array if it is a function and returns it. This can be handy to fetch the callback from an arguments array ([err, a1, a2, an, cb]).

var popfun = require('popfun')
function echo () {
  var args = Array.prototype.slice.call(arguments)
  var callback = popfun(args)
  if (callback) callback(null, args.join(' '))
echo('hey', 'you', function (errmsg) {
  • args Object to pop if last element is of type 'function'

This function can take any type. If it receives an array, it pops the last element, and returns the element; else it returns null.

With npm do:

npm install popfun

MIT License