Swift 2 changes

####Structs are value types

classes are reference types

• print()

Array:

eg: var arr:Array<Int> = [] or var arr:[Int] = []

for mixed values you have to explicitly mention: var mixed:[Any] = [1, "str", false] var mixed:[AnyObject] = [1, "str"]

mixed.append(2, atIndex:3) mixed.insert(2, atIndex:3) mixed.remoteAtIndex(2, atIndex:3)

.. all the way upto … all the way upto and including ..<

Array Slicing:

Array enumerate() to get the index

####Dictionary 2 ways of declaring: eg:

Optionals:

var x: Int? x = 12 var y:Int?

if x != nil { print("(x!)") }

//Optional binding (shortcut for above) if let z = x { print("(z)") }

if let xx = x { if let yy = y { print(xx*yy) } }

// in swift 2 - multiple conditions in one line if let xx = x, let yy = y { print(xx*yy) }

if let xx = x where xx % 2 == 0 { print(xx) }