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Articles tagged with #programming-languages
Creating errors with errors.New() function If we don't need a custom type for an error, and we can work with a single error type then we can use errors.New() function to create an error on the fly. Creating a new error is simple. We simply need to ca...
Error is a result of unexpected circumstances or abnormal behaviour of the program. For example, a network connection error, a user entering incorrect data, a function invoked with inaccurate values or a file not found, and many other scenarios could...
Type assertion Type assertion is used to get the underlying concrete value of the interface variable. i.(Type) this is the syntax of type assertion, where: i -> interface variable Type -> type that implements the interface Let's see an example of typ...
In Golang, an interface is a set of method signatures. When any type defines all the methods from an interface then that type implements the interface. So we can state that interface defines the behaviour of the object/type. For example, an animal wa...
Nested Structs Go allows us to use a struct as a field of another struct, this pattern is called nesting. A nested struct can be defined using the following syntax. type struct1 struct{ // fields } type struct2 struct{ // fields s struct...
What is Struct? A struct is a sequence of named elements, called fields, each of which has a name and a type. Field names may be specified explicitly (IdentifierList) or implicitly (EmbeddedField). Within a struct, non-blank field names must be uniqu...