nilsmagnus / functions

Handy collection functions for the go language

functions to go

Handy collection-functions for the go language.

Functions to support common collection-operations:

• map
• reduce
• filter
• associate,associateby
• contains, containsAll
• first, last
• forEach, forEachIndexed
• distinct

Coming soon: See godoc for complete documentation.

getting started

go get github.com/nilsmagnus/functions

package main

import (
	"fmt"
	"github.com/nilsmagnus/functions"
	"log"
)

func main() {
	items := []int{1, 2, 99}

	mappedItems := functions.Map(items, func(a int) string { return fmt.Sprintf("mapped %d", a) })

	log.Printf("Mapped items: %v", mappedItems)
}

Run this example on the playground

Have a look at functions_test.go for usage.

Map-function

numbers := []int{1,2,3,199}

mapd := Map(numbers, func(a int) string { return fmt.Sprintf("%d", a)}) 

// mapd => []string{"1", "2", "3", "199"}

AssociateBy-function

numbers := []int{1,2,3,199}

mapd := AssociateBy(numbers, func(t int) string {
    return fmt.Sprintf("%d", t)
}) 

// => map[string]int {"1":1, "2":2, "3":3, "199": 199}