go basic

101.go

f := "apple"
//is same as
var f = "apple"
//is same as
var f string = "apple"

operators : &&, ||

Closure
func intSeq() func() int {
    i := 0
    return func() int {
        i++
        return i
    }
}
nextInt := intSeq()
////////////////////////////
Interfaces are named collections of method signatures.
type geometry interface {
    area() float64
    perim() float64
}
/////////////////////////
errors.New("can't work with 42")

gistfile1.txt

1. Outside a function, every statement begins with a keyword (var, func, and so on) and so the := construct is not available.
2. Constants cannot be declared using the := syntax.

te.go

1. make -> make([]string, 3)//type, length
  creates array of same types
2. append -> append(s, "d")//array, new value(s) -> append(s, "e", "f")
  appends to the array the value
3. copy   -> copy(c, s)//copying (to,from)
4. delete -> delete(m, k)//delete from m entry with the key of 'k'
slice[start:end]

[2:5] -> [2, 3, 4]
[:5] -> [0:up to 5th]
[2:] -> [2:up to end]

/////////////////////////////////////
range iterates over arrays, maps, strings
for _, num := range nums {
        sum += num
}
//////////////////////////////////////
func plus(a type, b type) type {
    return a + b
}

func split(sum int) (x, y int) {
	x = sum * 4 / 9
	y = sum - x
	return
}
//same as return x, y. No need to declare vars at the top of the function

func vals() (int, int) {
    return 3, 7
}

Variadic functions can be called with any number of trailing arguments
func sum(nums ...int) {
    total := 0
    for _, num := range nums {
        total += num
    }
}