let say a function
func BuildRequest(string,string,string)
all three parameters are optional
`request, err := BuildRequest("","{}","")` --> incorrect
like in JS, Java, Python we have null, None but in golang nil is not from string family.
How can I solve this?
If that is the signature of the function (the signature is given), then it depends entirely on the implementation of the function. Most likely the empty string will represent the lack of actual argument value.
If you're free to choose the parameter type, then *string may be nil to represent null value. Or if you don't use the empty string value, denote that to be null and you may use string for convenience
See possible duplicates:
*stringfor optionals.