56 lines
1.0 KiB
Go
56 lines
1.0 KiB
Go
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package json
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import (
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"encoding/json"
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"fmt"
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"os"
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)
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var f = fmt.Println
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type person1 struct {
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Name string
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Age uint
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}
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type person2 struct {
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Name string `json:"name"`
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Age uint `json:"age"`
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}
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type person3 struct {
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Name string `json:"name"`
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Age uint `json:"age"`
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Albums []string `json:"albums"`
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}
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func Json() {
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stringBytes, _ := json.Marshal("foo")
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f("string =>", string(stringBytes))
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p1Bytes, _ := json.Marshal(&person1{"Abel", 34})
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f("person1 =>", string(p1Bytes))
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p2Bytes, _ := json.Marshal(&person2{"Abel", 34})
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f("person2 =>", string(p2Bytes))
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jsonBytes := []byte(`{"name": "Abel", "age": 34, "albums": ["Dawn FM"]}`)
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pMap := map[string]any{}
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json.Unmarshal(jsonBytes, &pMap)
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uname := pMap["name"].(string)
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f("map[name] =>", uname)
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ualbums := pMap["albums"].([]any)
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album0 := ualbums[0].(string)
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f("map[albums][0] =>", album0)
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p3 := &person3{}
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json.Unmarshal(jsonBytes, &p3)
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f("p3 =>", p3)
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f("Directly writing to stderr:")
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enc := json.NewEncoder(os.Stderr)
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enc.Encode(&p3)
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}
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