sample use case of process.nextTick on node.js

nextTickSample.js

function Foo() {
  var self = this;
  require('events').EventEmitter.call(arguments, this);
  // process.nextTick(function() {
    self.emit('foo');
  // });
}

require('util').inherits(Foo, require('events').EventEmitter);

var foo = new Foo();
foo.on('foo', function() {
  require('util').log('foo');
});