Package iter provides generic, lazy iterators, functions for producing them from primitive types, as well as functions and methods for transforming and consuming them.
package main
import (
"fmt"
"strings"
"mtoohey.com/iter/v2"
)
func main() {
initial := iter.Elems([]string{"hello", "beautiful", "world"})
result := initial.Filter(func(s string) bool {
return len(s) < 6
}).Map(strings.ToUpper).Collect()
fmt.Println(result) // produces: [HELLO WORLD]
}There is some overhead to using the iterators in this package, since each evaluation requires a function call, so if the performance of your application is a top priority, this package might not be the best choice. Don't guess about performance though: I would recommend benchmarking to determine the impact of using iterators, because in some cases, lazy iterators may be faster than the equivalent strict loop.
- Everyone that commented on my r/golang post
- The inspiration for my own attempt: https://github.com/polyfloyd/go-iterator