What is the difference between Go's higher-order functions and first-class functions for creating and using functions as values in Go programs?
In Go, functions are first-class citizens, which means that they can be treated like any other value, such as a string, integer, or struct. They can be assigned to variables, passed as arguments to other functions, and returned as results from functions. This enables Go to support higher-order functions, which are functions that operate on other functions.
Higher-order functions take one or more functions as arguments or return a function as a result. They are used to create abstractions that can be reused in different parts of the codebase. They also enable code to be more concise and expressive.
The difference between higher-order functions and first-class functions in Go is that first-class functions are a fundamental feature of the language, while higher-order functions are a pattern that can be implemented using first-class functions. Higher-order functions use first-class functions to create more powerful abstractions and enable more advanced programming techniques.