How to Download and Use Go 1.4
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software. It has a concise and expressive syntax, a powerful concurrency model, a rich set of built-in types and functions, and a fast and garbage-collected runtime.
The latest Go release, version 1.4, arrives as scheduled six months after 1.3. It contains only one tiny language change, in the form of a backwards-compatible simple variant of for-range loop, and a possibly breaking change to the compiler involving methods on pointers-to-pointers. The release focuses primarily on implementation work, improving the garbage collector and preparing the ground for a fully concurrent collector to be rolled out in the next few releases. Stacks are now contiguous, reallocated when necessary rather than linking on new "segments"; this release therefore eliminates the notorious "hot stack split" problem. There are some new tools available including support in the go command for build-time source code generation. The release also adds support for ARM processors on Android and Native Client (NaCl) and for AMD64 on Plan 9.
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In this article, I will show you how to download, install, and use Go 1.4 on your computer. I will also explain some of the benefits of using Go 1.4 for your projects.
Downloading Go 1.4
To download Go 1.4, you can either get a precompiled binary package for your operating system and architecture, or get the source code and build it yourself.
The precompiled binary packages are available from . You can choose from Windows, Linux, Mac OS X, FreeBSD, NetBSD, OpenBSD, DragonFly BSD, Plan 9, Solaris, or Android packages. Each package contains a compressed archive file that you can extract to a location of your choice.
The source code is available from . You can clone it using Git or download it as a zip file. To build the source code, you will need a working Go installation (version 1.4 or later) or a C compiler (gcc or clang). You will also need Git to fetch some dependencies.
Installing Go 1.4
To install Go 1.4 from a binary package, you need to extract the archive file to a location of your choice. The recommended location is /usr/local/go for Unix systems and C:\Go for Windows systems.
After extracting the archive file, you need to add the bin subdirectory of the extracted directory to your PATH environment variable. This will allow you to run the go command and other tools from any directory.
How to download and install Go 1.4 on Windows
Download Go 1.4 source code and build from scratch
Go 1.4 release notes and features
Download Go 1.4 for Linux, macOS, FreeBSD, or other OS
Go 1.4 installation problems and solutions
Download Go 1.4 binaries for different architectures (x86, x64, ARM, etc.)
Go 1.4 vs Go 1.3: what's new and what's changed
Download Go 1.4 documentation and tutorials
How to update Go 1.4 to the latest version
Download Go 1.4 tools and packages
How to uninstall Go 1.4 from your system
Download Go 1.4 for Android or iOS development
How to use Go 1.4 with Visual Studio Code or other IDEs
Download Go 1.4 for web development or cloud computing
How to test and debug Go 1.4 programs
Download Go 1.4 for data science or machine learning
How to write concurrent and parallel programs with Go 1.4
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How to use Go 1.4 modules and dependencies
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How to optimize and benchmark Go 1.4 programs
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How to use Go 1.4 with databases or APIs
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How to use Go 1.4 with C or other languages
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To install Go 1.4 from source code, you need to follow these steps:
Set the GOROOT_BOOTSTRAP environment variable to point to an existing Go installation (version 1.4 or later) or a C compiler (gcc or clang).
Change directory to the root of the source code tree.
Run ./all.bash (Unix) or all.bat (Windows) to build and test the toolchain and standard library.
If all tests pass, you will have a working Go installation in ./bin.
Add ./bin to your PATH environment variable.
Using Go 1.4
To use Go 1.4, you need to set up your environment, write and run Go code, and use the go command.
Setting up your environment
To set up your environment, you need to create a workspace directory where you will store your Go code and dependencies. The workspace directory can be any location of your choice, but it is recommended to use $HOME/go for Unix systems and %USERPROFILE%\go for Windows systems.
You also need to set the GOPATH environment variable to point to your workspace directory. This will tell the go command where to look for your code and dependencies. You can also optionally set the GOBIN environment variable to point to a directory where you want the go command to install executable files.
For example, on Unix systems, you can set up your environment as follows:
mkdir $HOME/go export GOPATH=$HOME/go export GOBIN=$HOME/go/bin
On Windows systems, you can set up your environment as follows:
mkdir %USERPROFILE%\go set GOPATH=%USERPROFILE%\go set GOBIN=%USERPROFILE%\go\bin
Writing and running Go code
To write Go code, you can use any text editor or IDE of your choice. Go code is organized into packages, which are collections of source files that share a common namespace and a common path. Each package has a name that is used to import it from other packages. The main package is a special package that defines an executable program, not a library.
To run Go code, you can use the go run command, which compiles and executes one or more source files. For example, if you have a file named hello.go in your current directory that contains the following code:
package main import "fmt" func main() fmt.Println("Hello, world!")
You can run it as follows:
go run hello.go
This will print "Hello, world!" to the standard output.
Using the go command
The go command is a tool that manages Go source code. It has several subcommands that perform different tasks, such as building, testing, installing, formatting, generating, and more. You can use the go help command to get more information about each subcommand.
Some of the most common subcommands are:
go build: compiles the packages named by the import paths and produces executable files or libraries.
go test: runs tests and benchmarks for the packages named by the import paths.
go install: compiles and installs the packages named by the import paths and their dependencies.
go fmt: formats the source code of the packages named by the import paths according to a standard style.
go generate: runs commands specified by directives within existing files to generate new files.
New features in Go 1.4
Go 1.4 introduces some new features, improvements, and bug fixes to the language and the standard library. Some of the most notable ones are:
A simple variant of for-range loop
The for-range loop syntax now allows omitting the loop variables if they are not needed. For example, instead of writing:
for _, v := range x // do something with v
You can now write:
for range x // do something
A change to methods on pointers-to-pointers
The compiler no longer accepts method calls on pointers-to-pointers that require two dereferences. For example, given these declarations:
type T int func (T) M() var x T
The method call x.M() is now illegal according to the language specification and will cause a compilation error.
Support for Android and NaCl on ARM
The Go toolchain now supports building and running Go programs on Android devices and Native Client (NaCl) sandboxed environments using ARM processors. You can use the GOOS=android and GOOS=nacl environment variables to target these platforms.
Support for Plan 9 on AMD64
The Go toolchain now supports building and running Go programs on Plan 9 operating system using AMD64 processors. You can use the GOOS=plan9 and GOARCH=amd64 environment variables to target this platform.
h3>Improvements to the garbage collector and stacks
The garbage collector and the stack management have been improved to reduce latency and memory usage. The garbage collector now uses a bitmap to track live objects, which reduces the heap size and the scanning time. The stacks are now contiguous and resizable, which eliminates the need for stack segments and the problem of hot stack splits.
New tools and commands
The go command now supports source code generation using the go generate subcommand. This subcommand runs commands specified by //go:generate directives within existing files to produce new files. For example, you can use go generate to run tools like stringer, yacc, or cgo.
The standard library now includes some new tools, such as:
cmd/trace: a tool for viewing trace files produced by programs instrumented with runtime/trace.
cmd/vet: a tool for checking common errors in Go source code.
cmd/pprof: a tool for interactive visualization of profiling data.
net/http/pprof: a package that serves profiling data via HTTP.
Conclusion
In this article, I have shown you how to download, install, and use Go 1.4 on your computer. I have also explained some of the benefits of using Go 1.4 for your projects, such as the new features, improvements, and bug fixes in the language and the standard library.
If you want to learn more about Go 1.4, you can check out .
I hope you enjoyed this article and found it useful. Happy coding with Go 1.4!
FAQs
Q: How do I update my existing Go installation to Go 1.4?
A: If you have installed Go from a binary package, you can simply download and extract the new package over the old one. If you have installed Go from source code, you can either use Git to pull the latest changes and rebuild the toolchain and standard library, or download and extract the new source code archive and follow the installation steps.
Q: How do I check which version of Go I have installed?
A: You can use the go version command to print the current Go version. For example:
go version go version go1.4 linux/amd64
Q: How do I uninstall Go from my computer?
A: To uninstall Go from your computer, you need to remove the directory where you have extracted or built Go (usually /usr/local/go or C:\Go), and remove any references to it from your PATH and other environment variables.
Q: How do I get help with Go?
A: You can get help with Go by reading .
Q: How do I contribute to Go?
A: You can contribute to Go by reporting issues, sending feedback, writing code, testing patches, reviewing changes, writing documentation, or spreading the word. You can find more information on how to contribute on . 44f88ac181
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