learning-swift.md

#Swift Intro Video

• Slides

###Constants and Vars

• Swift prefers immutability
• you can use unicode characters for var names 

####Type inference no need to specify type

###String

• collection of characters, can use a for in loop to iterate over characters
• can combine strings and characters

####Building Complex Strings

• interpolations

####Array and Dictionaries

• can work with any type, don't have to be objects or clas types
• Collections are typed collections. Can provide a type annotation to specify only accepts strings.

##Loops ###Create and modify collections ####For-in loop

• characters, strings, ranges 11:51, arrays, dictionaries

####Modifying an Array

• Nothing is represented by nil

###If Statements 21%20AM.png

• optional parens
• braces required

###Switch Statements

• must supply default case. either a case for every value or a default.

##Functions

Returning Values

###Tuples

• usefule when u want to pass around multiple values simply like when a function returns multiple values

• u get at those values with a constant

• for each iteration of the dict you get a tuple pair

####Another wayt o get values:

##Closures

• no need to specify types

• functions are named closures in Swift

##Classes

• no header files
• no base class required, can use NSObject for ex if you want

• would be let instead of var if you don't want to change it later on
• stored and computed properties 30:52
• computed properties, even read-only ones do need to be defined as variables

####Initializer Syntax

No more alloc!

• won't need an initializer if you had supplied a default value

####Dot Syntax

####Class initialization

• see intermediate talk

####Adding Methods to Functions

####Property Observers

left off at 36:10