Reflection

• It allows to examine and manipulate variables and types while your program is running.
• reflection may affect performance
• reflect package has 2 main types, reflect.Type and reflect.Value
• reflect.Type represents type of value while reflect.Value represents an instance of value.
• reflect.TypeOf() and reflect.ValueOf() function can be used to get them

Common Usages

• Custom struct tag
• dynamic type checking and type assertions
• iterating over struct fields
• implementing dependency injection: using ValueOf and Set methods to set fields of structs at runtime.

Reference

[00] https://levelup.gitconnected.com/reflection-in-go-everything-you-need-to-know-to-use-it-effectively-52c78da1f4ff