结构内部的结构切片/数组

Question

Please consider this go snippet: https://play.golang.org/p/JkMIRwshG5U

My Service struct holds:

type Service struct {
    ServiceName string
    NodeCount   int
    HeadNode    Node
    Health      bool
}

and my Node struct has:

type Node struct {
    NodeName  string
    LastHeard int
    Role      bool
    Health    bool
}

Suppose if I've 3 nodes for my Service; I'd like the Service struct to also have/keep a list of Nodes. Or, a slice of structs since this is Go, and how do I represent this in Service struct? (Sorry if this question still comes across ambiguous!)

Answer 1

As @JimB pointed out, you'll need a slice of Node objects. Just create a new field within the Service struct to store a slice of Node objects and then append each Node object to that slice of Node objects.

4 minor edits to your code:

type Service struct {
    ServiceName string
    NodeCount   int
    HeadNode    Node
    Health      bool
    // include Nodes field as a slice of Node objects
    Nodes       []Node
}

// local variable to hold the slice of Node objects
nodes := []Node{}

// append each Node to the slice of Node objects
nodes = append(nodes, Node1, Node2, Node3)

// include the slice of Node objects to the Service object during initialization
myService := Service{"PotatoServer", 3, Node1, true, nodes}

See a working example in the playground