content

values := store.Values{
	"title":    store.String("Welcome"),
	"featured": store.Boolean(false),
	"summary":  store.Null(),
	"tags":     store.List(),
}

title, ok := values["title"].StringValue()
fmt.Println("title:", title, ok)
// The bool checks the type, not whether the value is nonzero.
featured, ok := values["featured"].BooleanValue()
fmt.Println("featured:", featured, ok)
_, ok = values["title"].NumberValue()
fmt.Println("title is a number:", ok)

// Map membership is a separate check from the value's type.
_, exists := values["missing"]
fmt.Println("missing key exists:", exists)
summary := values["summary"]
fmt.Println("summary is null:", summary.Kind() == store.ValueNull)
tags := values["tags"]
fmt.Println("tags:", tags.Len(), tags.Kind() == store.ValueList)

Output:
title: Welcome true
featured: false true
title is a number: false
missing key exists: false
summary is null: true
tags: 0 true