Golang : Null and nil value
Programmers coming from different programming languages to Golang might wonder how does one deal with NULL values. I put down these reminders below about NULL value for myself and maybe this can be useful to you as well.
Here you go :
Golang does not support NULL.
Nil is the equivalent of NULL in Golang.
All variables by default are initiated with the nil(zero) value.
Example usage of nil :
correctHash := sha1.New() fmt.Printf("%x \n", correctHash.Sum(nil))
Function returning nil will NOT compile,
// not OK func getName() string { return nil }
but returning nil to a pointer or reference (such as a struct) is ok and will compile.
type Person struct { name string } // OK func getName() *Person { return nil }
By Adam Ng
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