YasushiKobayashi/arrayOperations

Small library for performing union, intersect, difference and distinct operations on slices in goLang

arrayOperations

Small library for performing union, intersect, difference and distinct operations on slices in goLang

I don't promise that these are optimized (not even close!), but they work :)

Quickstart

var a = []int{1, 1, 2, 3}
var b = []int{2, 4}

z, ok := Difference(a, b)
if !ok {
	fmt.Println("Cannot find difference")
}

slice, ok := z.Interface().([]int)
if !ok {
	fmt.Println("Cannot convert to slice")
}
fmt.Println(slice, reflect.TypeOf(slice)) // [1, 3, 4] []int

API

Difference

func Difference(arrs ...interface{}) (reflect.Value, bool)

Difference returns a slice of values that are only present in one of the input slices

[1, 2, 2, 4, 6] & [2, 4, 5] >> [1, 5, 6]

[1, 1, 3, 4, 5, 6] >> [1, 3, 4, 5, 6]

// EXAMPLE
var a = []int{1, 1, 2, 3}
var b = []int{2, 4}

z, ok := Difference(a, b)
if !ok {
    fmt.Println("Cannot find difference")
}

slice, ok := z.Interface().([]int)
if !ok {
    fmt.Println("Cannot convert to slice")
}
fmt.Println(slice, reflect.TypeOf(slice)) // [1, 3, 4] []int

Distinct

func Distinct(arr interface{}) (reflect.Value, bool)

Distinct returns the unique vals of a slice

[1, 1, 2, 3] >> [1, 2, 3]

// EXAMPLE
var a = []int{1, 1, 2, 3}

z, ok := Distinct(a)
if !ok {
    fmt.Println("Cannot find distinct")
}

slice, ok := z.Interface().([]int)
if !ok {
    fmt.Println("Cannot convert to slice")
}
fmt.Println(slice, reflect.TypeOf(slice)) // [1, 2, 3] []int

Intersect

func Intersect(arrs ...interface{}) (reflect.Value, bool)

Intersect returns a slice of values that are present in all of the input slices

[1, 1, 3, 4, 5, 6] & [2, 3, 6] >> [3, 6]

[1, 1, 3, 4, 5, 6] >> [1, 3, 4, 5, 6]

// EXAMPLE
var a = []int{1, 1, 2, 3}
var b = []int{2, 4}

z, ok := Intersect(a, b)
if !ok {
    fmt.Println("Cannot find intersect")
}

slice, ok := z.Interface().([]int)
if !ok {
    fmt.Println("Cannot convert to slice")
}
fmt.Println(slice, reflect.TypeOf(slice)) // [2] []int

Union

func Union(arrs ...interface{}) (reflect.Value, bool)

Union returns a slice that contains the unique values of all the input slices

[1, 2, 2, 4, 6] & [2, 4, 5] >> [1, 2, 4, 5, 6]

[1, 1, 3, 4, 5, 6] >> [1, 3, 4, 5, 6]

// EXAMPLE
var a = []int{1, 1, 2, 3}
var b = []int{2, 4}

z, ok := Union(a, b)
if !ok {
    fmt.Println("Cannot find union")
}

slice, ok := z.Interface().([]int)
if !ok {
    fmt.Println("Cannot convert to slice")
}
fmt.Println(slice, reflect.TypeOf(slice)) // [1, 2, 3, 4] []int

License

MIT