Go的空白标识符

tony2099 included in Go

2021-01-16 65 words One minute

Contents

是什么?

代表被忽略的变量 underscore means ignoring the value;

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if _, isExists := ageMaps["jim"];isExists{
 // do other thing

 }

the import package is ignored, but the init function have taken effect;

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import (
 _ "github.com/go-sql-driver/mysql"
)
func init() {
 sql.Register("mysql", &MySQLDriver{})
}

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var _ DogType = (*BullDog)(nil)