What is the difference between Go's function composition and function pipelining for creating and using composed and pipelined functions in Go programs?

Function composition and function pipelining are both techniques for creating and using composed functions in Go programs, but they differ in their approach and use case.

Function composition is the process of combining two or more functions to create a new function that performs both operations in sequence. In Go, this is typically done by defining a new function that takes the output of one function as input to the next function. For example, if we have two functions **f** and **g**, we can compose them into a new function **h** that performs both operations:

func f(x int) int {
    return x + 1
}

func g(x int) int {
    return x * 2
}

func h(x int) int {
    return g(f(x))
}

In this example, **h** is a composed function that first applies **f** to its input, and then applies **g** to the result of **f**.

Function pipelining, on the other hand, is the process of passing a value through a sequence of functions, with each function operating on the output of the previous function. In Go, this is typically done using the **|>** operator, which passes the output of one function as the input to the next function. For example, if we have two functions **f** and **g**, we can pipe them together to create a new function **h** that performs both operations:

func f(x int) int {
    return x + 1
}

func g(x int) int {
    return x * 2
}

func h(x int) int {
    return x |> f |> g
}

In this example, **h** is a pipelined function that first applies **f** to its input, and then applies **g** to the result of **f**.

So, the main difference between function composition and function pipelining is that function composition combines two or more functions into a single function, while function pipelining passes a value through a sequence of functions. Function composition is useful when you want to create a new function that performs two or more operations in sequence, while function pipelining is useful when you want to apply a sequence of operations to a single value.