js scoping demo (node.js)

node_scope_test.js

var sys = require('sys');

var foo = {
  name: 'foo',
  bar: function() {
    sys.puts('in bar, this is ' + this.name);
    setTimeout(this.bar, 1000);
  },
  baz: function() {
    var me = this;
    sys.puts('in baz, this is ' + this.name);
    setTimeout(function(){ me.baz(); }, 1000);
  }
};

foo.bar(); // 'this' scope goes away after one invocation
foo.baz(); // closing over the scope keeps it around

// $ node node_scope_test.js
// in bar, this is foo
// in baz, this is foo
// in bar, this is undefined
// in baz, this is foo
// in baz, this is foo
// in baz, this is foo
// ...^C