Golang check function method

Preface

Golang is a very popular programming language and is widely used in many fields. As a modern language, it has a very comprehensive standard library and also has many cross-platform features. In golang's standard library, we can find a variety of functions and methods to complete our development tasks. This article mainly introduces how to find function methods in golang.

1. Find online documentation

Golang official documentation is very comprehensive and can be accessed on the official website (https://golang.org/doc/). The official documentation contains a detailed introduction to the golang standard library. For novices, you can first learn about the functions and methods in the standard library through the official documentation.

In the official documentation, we can find functions and methods according to different packages. For example, if we want to know about the functions and methods in the fmt package, we can visit https://golang.org/pkg/fmt/. In this page, we can see all functions and methods defined in the fmt package, including function and method definitions, input parameters, and return values.

In the official documentation, we can also use the search function to find the functions and methods we need. In the search box in the upper left corner, enter the name of the function or method we need to find, and then press the Enter key. Search results list details such as the function or method's definition, input parameters, and return values.

2. Use godoc

In addition to official documents, we can also use Godoc to find functions and methods. Godoc is a command line tool that can be run locally to help us find functions and methods in standard libraries, third-party libraries, and libraries written by ourselves.

Using Godoc is very simple. First, we need to install golang. After the installation is complete, open a terminal (Windows users can use cmd or Powershell, Linux and macOS users can use the terminal) and enter the following command:

go get golang.org/x/tools/cmd/godoc

This command will download and install the Godoc tool. After the installation is complete, we can use the following command to start the Godoc service:

godoc -http=:6060

After executing the above command, we can enter http://localhost:6060/ in the browser to access the Godoc interface. In this interface, we can enter the function and method names we need to find in the search bar on the left.

For example, we want to find the Printf function in the fmt package. Type fmt.Printf in the search bar and press Enter. The Printf function and other functions and type definitions related to it are listed in the search results. We can click on the function name to view the function documentation and sample code.

3. Use third-party libraries

In addition to Godoc and official documents, we can also use some third-party libraries to find functions and methods. These libraries usually provide more user-friendly and friendly search functions, making it easier for us to find functions and methods.

The following are some common third-party libraries:

1. GoDocSearch: https://godoc.org/search

GoDocSearch is a GoDoc search Engine that we can use to find functions and methods in the standard library, third-party libraries, and libraries we write ourselves. The search function of GoDocSearch is very powerful and supports functions such as fuzzy search and tag search.

2. gopkgdoc: https://docs.google.com/presentation/d/1BvNXs5r1JGL12v2D_6ZwaU-XbTIVv1kH9uvu9TAiTP8/edit

gopkgdoc is also a GoDoc search engine, similar to GoDocSearch , but its search results are rendered as offline documents. In addition, gopkgdoc also provides a library called pkgsite to help developers publish their own documentation sites.

4. Summary

Finding functions and methods is a very important part of the golang development process. By using official documentation, Godoc, and third-party libraries, we can quickly and accurately find the functions and methods we need. At the same time, we can also learn from the code written by other developers and gain inspiration and experience from it.

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