An example in swift tour in <https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/GuidedTour.html#//apple_ref/doc/uid/TP40014097-CH2-ID1>

```
var occupations = [
  "Malcolm": "Captain",
  "Kaylee": "Mechanic",
]
occupations["Jayne"] = "Public Relations"

```

The final result of occupations is :

```
["Kaylee": "Mechanic", "Jayne": "Public Relations", "Malcolm": "Captain"]

```

My question:

1. Is var occupations a Map?
2. In what order does new item be added?