37 lines
601 B
Go
37 lines
601 B
Go
package main
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func main() {
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m := make(map[int]string)
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m[1] = "hello"
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m[2] = "world"
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m[3] = "llgo"
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println(m, m[1], m[2], len(m))
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for k, v := range m {
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println(k, ":", v)
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}
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s := make(map[string]int, len(m))
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for k, v := range m {
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s[v] = k
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}
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id, ok := s["llgo"]
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println("llgo", id, ok)
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none, ok := s["go"]
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println("go", none, ok)
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delete(s, "llgo")
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if _, ok := s["llgo"]; ok {
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panic("bad key")
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}
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if len(s) != 2 {
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panic("bad len")
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}
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m2 := make(map[int]string)
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println(m2, len(m2), m2 == nil, m2 != nil)
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var m3 map[int]string
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println(m3, len(m3), m3 == nil, m3 != nil)
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}
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