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Go 1.18: What's New and How to Download It

How to Download and Install Go 1.18

Go is an open-source programming language that can be used to create a wide range of applications, from web development to distributed systems. It is developer-friendly, fast, reliable, and easy to learn. Go has a large and active community that contributes to its development and provides many packages and tools for various use cases.

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In March 2022, the Go team released Go 1.18, which is a massive release that includes new features, performance improvements, and the biggest change ever to the language: generics. In this article, we will explore some of the main features and benefits of Go 1.18, and show you how to download and install it on your computer.


Generics are one of the most requested features in Go, and they are finally here in Go 1.18. Generics allow you to write code that can handle multiple types without repeating yourself or using interface. Generics work by using parameterized types, which are types that have one or more type parameters that can be instantiated with different types.

For example, you can write a generic function that can swap any two values of the same type:

func swap[T any](a, b *T) *a, *b = *b, *a

You can then call this function with different types of arguments:

var x int = 1 var y int = 2 swap[int](&x, &y) // x = 2, y = 1 var s string = "hello" var t string = "world" swap[string](&s, &t) // s = "world", t = "hello"

You can also use type constraints to restrict the types that can be used as type parameters. Type constraints are interface types that specify what methods or operations a type parameter must support. For example, you can write a generic function that can compare any two values of a comparable type:

type comparable interface complex128 func max[T comparable](a, b T) T if a > b return a return b

You can then call this function with any comparable type:

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fmt.Println(max[int](3, 5)) // prints 5 fmt.Println(max[string]("foo", "bar")) // prints "foo" fmt.Println(max[bool](true, false)) // prints true type point struct x int y int fmt.Println(max[point](point1,2, point3,4)) // prints 3,4

To learn more about generics in Go Fuzzing

Fuzzing is a technique where you generate and run random inputs to a program to find bugs that might otherwise go unnoticed. Fuzzing can be especially useful for finding security vulnerabilities, such as buffer overflows, SQL injections, or cross-site scripting attacks.

Go 1.18 supports fuzzing in its standard toolchain, making Go the first major programming language to do so. You can use fuzzing in Go with the go command, which will automatically generate and run inputs for your fuzz target, a function that takes a *testing.F parameter and one or more fuzzing arguments. The go command will use coverage guidance to intelligently explore the code paths of your fuzz target and report any failures or panics.

For example, you can write a fuzz target that tests the Reverse function from the previous section:

func FuzzReverse(f *testing.F) f.Fuzz(func(t *testing.T, s string) r := Reverse(s) if Reverse(r) != s t.Errorf("Reverse(Reverse(%q)) != %q", s, s) )

You can then run this fuzz target with the go command:

go test -fuzz=FuzzReverse

The go command will generate and run random strings as inputs to the fuzz target, and report any errors or crashes. You can also add seed corpus entries to provide initial inputs for the fuzzing engine, either by using the (*testing.F).Add method or by placing files in the testdata/fuzz directory of the fuzz target.

To learn more about fuzzing in Go, you can check out the [tutorial](^2^) or the [documentation](^1^). Workspaces

Workspaces are a new feature in Go 1.18 that simplify working with multiple modules in a single directory tree. Workspaces allow you to create and switch between different sets of modules and dependencies without modifying the go.mod files or the GOPATH environment variable.

You can use workspaces in Go with the go command, which will automatically detect and use the workspace configuration file, named, if i