for-of vs _.map

foo.coffee

_ = require('underscore')

class Bar
  constructor: ->
    @bar = "Bar!"
  baz: 'Bar!'

class Foo extends Bar
  constructor: ->
    @foo = "Foo!"

obj = new Foo

console.log "=== for-of ==="
for k, v of obj
  console.log "#{k}:#{v}"

console.log "=== _.map ==="
_.map obj, (v,k)->
  console.log "#{k}: #{v}"


console.log "=== object hash ==="

dict = 
  foo: 'foo'
  bar: 'bar'
  baz: 'baz'

for k, v of dict
  console.log "#{k}:#{v}"

output.txt

$ pbpaste | coffee -s
=== for-of ===
foo:Foo!
constructor:function Foo() {
      this.foo = "Foo!";
    }
baz:Bar!
=== _.map ===
foo: Foo!
=== object hash ===
foo:foo
bar:bar
baz:baz