iter

README

iter

Iterators for Go using 1.18beta1 generics.

Usage

package main

import (
  "fmt"
  "strings"

  "github.com/mtoohey31/iter"
)

func main() {
  initial := iter.FromSlice([]string{"hello", "beautiful", "world"})
  result := initial.Filter(func(s string) bool {
    return len(s) < 6
  }).MapSame(func(s string) string {
    return strings.ToUpper(s)
  }).Collect()
  fmt.Println(result) // produces: [HELLO WORLD]
}

See examples/ for more demonstrations.

Notes

• It should go without saying that since 1.18 is still beta, so is this library.
• From what I can tell, with my limited understanding of go memory management, sliceInner struct is rather inefficient because it duplicates values and leaves past items sitting inside itself.

Similar Projects

• The inspiration for my own attempt, which is more mature but doesn't support chaining calls: https://github.com/polyfloyd/go-iterator