slice

Package slice implements some popular helpers for working with Go slices in functional manner.

It uses Go generic syntax according to the proposal that might be implemented in the language in Go 1.18.

Usage

package main

import "github.com/nDmitry/slice"

func main() {
    ints := []int{1, 2, 3, 4, 5}
    strings := []string{"eat", "a", "cake"}

    fmt.Println(
        slice.Filter(ints, func(item int, _ int) bool { return item%2 == 0 }),
        slice.Filter(ints, func(item int, i int) bool { return i%2 == 0 }),
        slice.Filter(strings, func(item string, _ int) bool { return len(item) == 4 }),

        slice.Some(ints, func(item int, _ int) bool { return item%2 == 0 }),
        slice.Every(ints, func(item int, _ int) bool { return item%2 == 0 }),

        slice.Find(ints, func(item int, _ int) bool { return item%2 == 0 }),
        slice.FindLast(ints, func(item int, _ int) bool { return item%2 == 0 }),
        slice.FindIndex(ints, func(item int, _ int) bool { return item%2 == 0 }),
        slice.FindLastIndex(ints, func(item int, _ int) bool { return item%2 == 0 }),

        slice.Map(ints, func(item int, _ int) int { return item * item }),
        slice.Map(ints, func(item int, _ int) float64 { return float64(item) * 0.5 }),

        slice.Reduce(ints, func(sum int, item int, _ int) int { return sum + item }, 0),
    )
}