akrennmair / slice

slice provides generic Map, Reduce and Filter functions for Go.

slice

slice is a simple Go package to provide generic versions of Map, Reduce and Filter on slices. I mainly wrote it as an exercise to get more familar with Go 1.18's new type parameterization feature, but decided to publish it in case it is useful for others.

package main

import (
	"fmt"
	"math"

	"github.com/akrennmair/slice"
)

func main() {
	someNumbers := []float64{1.0, 2.0, 4.0, 23.5, 42.9}
	fmt.Printf("sqrt(%v) = %v\n", someNumbers, slice.Map(someNumbers, func(v float64) float64 {
		return math.Sqrt(v)
	}))

	someStrings := []string{"hello", "to", "the", "golang", "community"}
	fmt.Printf("len(%v) = %v\n", someStrings, slice.Map(someStrings, func(s string) int {
		return len(s)
	}))
	fmt.Printf("total length: %d\n", slice.Reduce(slice.Map(someStrings, func(s string) int {
		return len(s)
	}), func(acc, i int) int {
		return acc + i
	}))

	moreNumbers := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
	fmt.Printf("even numbers: %v\n", slice.Filter(moreNumbers, func(i int) bool {
		return i%2 == 0
	}))
}

channel

An additional package github.com/akrennmair/slice/channel is also provided that contains Map, Reduce and Filter functions that operate on chans.

Authors

• Andreas Krennmair [e-mail]

License

See the file LICENSE for license information.