How to get a subset of a javascript object's properties

Question

Say I have an object:

elmo = { 
  color: \'red\',
  annoying: true,
  height: \'unknown\',
  meta: { one: \'1\', two: \'2\'}
};

I want to m

Answer 1

Using the "with" statement with shorthand object literal syntax

Nobody has demonstrated this method yet, probably because it's terrible and you shouldn't do it, but I feel like it has to be listed.

var o = {a:1,b:2,c:3,d:4,e:4,f:5}
with(o){
  var output =  {a,b,f}
}
console.log(output)

Pro: You don't have to type the property names twice.

Cons: The "with" statement is not recommended for many reasons.

Conclusion: It works great, but don't use it.