[Go] Using lists.

package main

import (
    "errors"
    "github.com/cwchentw/algo-golang/list"
    "log"
)

func main() {
    l := list.New()

    for i := 1; i <= 10; i++ {
        l.Push(i)
    }

    evens, _ := l.Select(isEven)
    for e := range evens.Iter() {
        n, _ := e.(int)
        if n % 2 != 0 {
            log.Fatalln("Error Select result")
        }
    }
}

func isEven(a interface{}) (bool, error) {
    n, ok := a.(int)
    if ok != true {
        return false, errors.New("Failed type assertion on a")
    }

    return n % 2 == 0, nil
}