break in for-range loop will leave garbage

[AlekSi]

http://ewencp.org/blog/golang-iterators/

[mantyr]

It is quite obvious. Example next:

[mantyr]

func TestIterBack(t *testing.T) {
    items := New()
    for i := 0; i < 100; i++ {
        items.Add(i, i)
    }

    i := 0
    for _, key := range items.Keys {
        item, ok := items.Get(key)
        if !ok {
            continue
        }
        if item == 10 {
            break
        }
        i++
    }
    if i != 10 {
        t.Errorf("Ooops, position error")
    }
}

Its Work.