Golang: Sorting a slice of basic types and custom types

For Sorting a slice of basic types, int, float64 and string, we can use build-in functions, sort.Ints, sort.Float64s and sort.Strings to get a sorted slice in ascending order. When it comes to custom types, there are two ways to sort, sort.Slice or sort.Sort. Use sort.Sort function will need to create a corresponding custom type to implement sort.Interface ahead.

Golang: sorting summary card

Table of Contents
· Sorting a Slice of basic types
  ∘ Use built-in function
· Sorting a Slice of custom types
  ∘ Use function sort.Slice
  ∘ Use function sort.Sort

Sorting a Slice of basic types

Use built-in function

• int slices: sort.Ints
• float64 slices: sort.Float64s
• string slices: sort.Strings

Sorting a Slice of custom types

Use function sort.Slice

• sort a slice by a specified field
• use the provided less function to decide the sorted order.

func Slice(x interface{}, less func(i, j int) bool)

• no need to create custom type for the slice

Use function sort.Sort

• custom sorting by implementing sort.Interface

type Interface interface {
	Len() int
	Less(i, j int) bool
	Swap(i, j int)
}

• need to create a custom type for the slice to implement sort.Interface

You can reach the whole source code here.