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Because not all types are comparable, e.g. a slice. So we can't do this
var v ArbitraryType
v == reflect.Zero(reflect.TypeOf(v)).Interface()
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There are 3 ways to find the type of variables in Golang as follows: 1 Using reflect.TypeOf Function 2 Using reflect.ValueOf.Kind () Function 3 Using %T with Printf More ...
%T in fmt package is a Go-syntax representation of the type of the value. You can use %T to find the variable type. Note: An empty interface is denoted by interface {} can be used to hold values of any type.
4 methods to check or find type of an Object or Variable in Go. To check or find the type of variable or object in Go language, we can use %T string format flag, reflect.TypeOf, reflect.ValueOf.Kind functions. And another method is to use type assertions with switch case.
Last Updated : 04 May, 2020 If the structure is empty means that there is no field present inside that particular structure. In Golang, the size of an empty structure is zero. Whenever the user wants to know if the created structure is empty or not, he can access the structure in the main function through a variable.
Go 1.13 introduced Value.IsZero method in reflect package. This is how you can check for zero value using it:
if reflect.ValueOf(v).IsZero() {
// v is zero, do something
}
Apart from basic types, it also works for Chan, Func, Array, Interface, Map, Ptr, Slice, UnsafePointer, and Struct.
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