How to Create Distinct Channels in Go: A Guide to Memory Leak Prevention

Distinctive Channels in Go

In Go, a common requirement is to create channels that only output distinct values. To achieve this, however, requires some additional considerations.

Implementation

A straightforward solution is to utilize a map to store encountered values. Here's a simple implementation:

<code class="go">func UniqueGen(min, max int) <-chan int {
    m := make(map[int]struct{}, max-min)
    ch := make(chan int)
    go func() {
        for i := 0; i < 1000; i++ {
            v := min + rand.Intn(max)
            if _, ok := m[v]; !ok {
                ch <- v
                m[v] = struct{}{}
            }
        }
        close(ch)
    }()

    return ch
}</code>

Memory Leak Concerns

When using a map to remember previously encountered values, one may worry about memory leaks. However, in this implementation, the map is bounded to the range of possible values (max - min) and is cleared upon channel closure. Therefore, there is no memory leak concern.

The above is the detailed content of How to Create Distinct Channels in Go: A Guide to Memory Leak Prevention. For more information, please follow other related articles on the PHP Chinese website!