How Do Lambda Expressions Work in Go?

Lambda Expressions in Go

In Go, lambda expressions are implemented using anonymous functions. This allows you to define functions inline, without having to declare them separately.

Creating a lambda expression in Go is straightforward. Simply use the func keyword followed by the function's parameters and body. For example, the following code defines a lambda expression that returns a string:

func foo() string {
  return "Stringy function"
}

Lambda expressions can be used anywhere you would use a normal function. For instance, you can pass them as arguments to other functions or store them in variables.

The following example demonstrates how to use a lambda expression to pass a function as an argument to another function:

func takesAFunction(foo func() string) {
  fmt.Printf("takesAFunction: %v\n", foo())
}

You can also use lambda expressions to define functions that are returned from other functions. The following example returns a lambda expression that prints a string:

func returnsAFunction() Stringy {
  return func() string {
    fmt.Printf("Inner stringy function\n")
    return "bar" // have to return a string to be stringy
  }
}

As you can see, lambda expressions in Go are a powerful tool that can be used to create concise and reusable code.

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