Getters & Setters

Getters and setters are not provided by default in go, but we can use it.

• If we have a field called name we can have a getter like Name() not GetName()
• a setter like SetName()

Interface names

Following are some of the well-known interfaces

• Do not name your interface Reader, Writer, Formatter, CloseNotifier unless you have the same signature and meaning
• One method interfaces are named the method name+er like above

Mixed caps

Do not use underscore like_this to write multi-word name in go. Write likeThis or LikeThis.

Data

Allocation with new(T)

• It allocates memory for type T and zeros them out
• new(T) returns a *T
• new(T) does not initializes type T

T{prop: value} composite literal

• We can initialize a type with literals
• Person{name: "Mr. Tom"} will create a new instance of Person each time it is evaluated
• &Person{} is same as new(Person)

Allocation with make

make(T, args) is different from previous two methods. It returns an initialized (not zeroed) value of type T not *T. It is used for slices, maps and channels only, because these types are representations of something else under the hood that must be initialized before use.

• A slice uses a three item descriptor

  • a pointer to the data contained in an array *[1,2,3]

  • the length of the slice

  • the capacity of the slice

    A psudo code representation of a slice

    array 0x001111: [1,2,3,4,5] // somewhere in the memory
    
    type slice {
        *array[int]: 0x001111
        length: int
        capacity: int
    }