README
¶
gopl
English | 简体中文
gopl（The Go Programming Language）是一个包含了 《Go 程序设计语言》 中全部示例代码和全部练习题参考答案的项目。
Go 程序设计语言
ISBN: 978-7111558422
安装
git clone https://github.com/linehk/gopl.git
参与贡献
如果你觉得我的参考答案有什么需要改进的地方，欢迎发起 Pull Request。
如果有重大变化，请先打开一个 Issue，讨论您想要改变的内容。
开源许可证
祝语
Happy Go programming, I hope you enjoy writing Go as much as I do.
Directories
¶
| Path | Synopsis |
|---|---|
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ch1
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dup1
Dup1 prints the text of each line that appears more than once in the standard input, preceded by its count.
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Dup1 prints the text of each line that appears more than once in the standard input, preceded by its count. |
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dup2
Dup2 prints the count and text of lines that appear more than once in the input.
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Dup2 prints the count and text of lines that appear more than once in the input. |
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dup3
Dup3 prints the count and text of lines that appear more than once in the named input files.
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Dup3 prints the count and text of lines that appear more than once in the named input files. |
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echo1
Echo1 prints its command-line arguments.
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Echo1 prints its command-line arguments. |
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echo2
Echo2 prints its commamd-line arguments.
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Echo2 prints its commamd-line arguments. |
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echo3
Echo3 prints its command-line arguments.
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Echo3 prints its command-line arguments. |
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exercise1.10
Fetchall fetches URLs in parallel and reports their times and sizes.
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Fetchall fetches URLs in parallel and reports their times and sizes. |
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exercise1.11
越长的参数运行得越久，网站没回应的话会跳过。
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越长的参数运行得越久，网站没回应的话会跳过。 |
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exercise1.12
Lissajous generates GIF animations of random Lissajous figures.
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Lissajous generates GIF animations of random Lissajous figures. |
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exercise1.5
Lissajous generates GIF animations of random Lissajous figures.
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Lissajous generates GIF animations of random Lissajous figures. |
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exercise1.6
Lissajous generates GIF animations of random Lissajous figures.
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Lissajous generates GIF animations of random Lissajous figures. |
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exercise1.7
Fetch prints the content found at each specified URL.
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Fetch prints the content found at each specified URL. |
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exercise1.8
Fetch prints the content found at each specified URL.
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Fetch prints the content found at each specified URL. |
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exercise1.9
Fetch prints the content found at each specified URL.
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Fetch prints the content found at each specified URL. |
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fetch
Fetch prints the content found at each specified URL.
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Fetch prints the content found at each specified URL. |
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fetchall
Fetchall fetches URLs in parallel and reports their times and sizes.
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Fetchall fetches URLs in parallel and reports their times and sizes. |
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helloworld
Helloworld is our first Go program.
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Helloworld is our first Go program. |
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lissajous
Lissajous generates GIF animations of random Lissajous figures.
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Lissajous generates GIF animations of random Lissajous figures. |
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lissajous_web
Lissajous generates GIF animations of random Lissajous figures.
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Lissajous generates GIF animations of random Lissajous figures. |
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server1
Server1 is a minimal "echo" server.
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Server1 is a minimal "echo" server. |
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server2
Server2 is a minimal "echo" and counter server.
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Server2 is a minimal "echo" and counter server. |
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server3
Server3 is an "echo" server that displays request parameters.
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Server3 is an "echo" server that displays request parameters. |
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ch10
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cross
The cross command prints the values of GOOS and GOARCH for this target.
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The cross command prints the values of GOOS and GOARCH for this target. |
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jpeg
The jpeg command reads a PNG image from the standard input and writes it as a JPEG image to the standard output.
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The jpeg command reads a PNG image from the standard input and writes it as a JPEG image to the standard output. |
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ch11
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echo
Echo prints its command-line arguments.
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Echo prints its command-line arguments. |
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exercise11.1
Charcount computes counts of Unicode characters.
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Charcount computes counts of Unicode characters. |
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exercise11.2
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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exercise11.3
Package word provides utilities for word games.
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Package word provides utilities for word games. |
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exercise11.4
Package word provides utilities for word games.
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Package word provides utilities for word games. |
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exercise11.7
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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storage1
Package storage is part of a hypothetical cloud storage server.
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Package storage is part of a hypothetical cloud storage server. |
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storage2
Package storage is part of a hypothetical cloud storage server.
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Package storage is part of a hypothetical cloud storage server. |
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word1
Package word provides utilities for word games.
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Package word provides utilities for word games. |
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word2
Package word provides utilities for word games.
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Package word provides utilities for word games. |
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ch12
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exercise12.12
Package params provides a reflection-based parser for URL parameters.
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Package params provides a reflection-based parser for URL parameters. |
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exercise12.13
Package sexpr provides a means for converting Go objects to and from S-expressions.
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Package sexpr provides a means for converting Go objects to and from S-expressions. |
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exercise12.8
Package sexpr provides a means for converting Go objects to and from S-expressions.
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Package sexpr provides a means for converting Go objects to and from S-expressions. |
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format
Package format provides an Any function that can format any value.
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Package format provides an Any function that can format any value. |
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methods
Package methods provides a function to print the methods of any value.
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Package methods provides a function to print the methods of any value. |
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params
Package params provides a reflection-based parser for URL parameters.
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Package params provides a reflection-based parser for URL parameters. |
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search
Search is a demo of the params.Unpack function.
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Search is a demo of the params.Unpack function. |
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sexpr
Package sexpr provides a means for converting Go objects to and from S-expressions.
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Package sexpr provides a means for converting Go objects to and from S-expressions. |
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ch13
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bzip
Package bzip provides a writer that uses bzip2 compression (bzip.org).
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Package bzip provides a writer that uses bzip2 compression (bzip.org). |
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bzipper
Bzipper reads input, bzip2-compresses it, and writes it out.
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Bzipper reads input, bzip2-compresses it, and writes it out. |
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equal
Package equal provides a deep equivalence relation for arbitrary values.
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Package equal provides a deep equivalence relation for arbitrary values. |
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exercise13.1
Package equal provides a deep equivalence relation for arbitrary values.
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Package equal provides a deep equivalence relation for arbitrary values. |
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exercise13.3
Package bzip provides a writer that uses bzip2 compression (bzip.org).
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Package bzip provides a writer that uses bzip2 compression (bzip.org). |
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unsafeptr
Package main demonstrates basic use of unsafe.Pointer.
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Package main demonstrates basic use of unsafe.Pointer. |
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ch2
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boiling
Boiling prints the boiling point of water.
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Boiling prints the boiling point of water. |
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cf
Cf converts its numeric argument to Celsius and Fahrenheit.
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Cf converts its numeric argument to Celsius and Fahrenheit. |
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echo4
Echo4 prints its command-line arguments.
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Echo4 prints its command-line arguments. |
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exercise2.1
Package tempconv performs Celsius and Fahrenheit conversion.
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Package tempconv performs Celsius and Fahrenheit conversion. |
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exercise2.2
Package tempconv performs Celsius and Fahrenheit and Kelvin conversion.
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Package tempconv performs Celsius and Fahrenheit and Kelvin conversion. |
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ftoc
Ftoc prints two Fahrenheit-to-Celsius conversions.
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Ftoc prints two Fahrenheit-to-Celsius conversions. |
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tempconv
Package tempconv performs Celsius and Fahrenheit conversion.
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Package tempconv performs Celsius and Fahrenheit conversion. |
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tempconv0
Package tempconv performs Celsius and Fahrenheit temperature computations.
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Package tempconv performs Celsius and Fahrenheit temperature computations. |
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ch3
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basename1
Basename1 reads file names from stdin and prints the base name of each one.
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Basename1 reads file names from stdin and prints the base name of each one. |
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basename2
Basename2 reads file names from stdin and prints the base name of each one.
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Basename2 reads file names from stdin and prints the base name of each one. |
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comma
Comma prints its argument numbers with a comma at each power of 1000.
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Comma prints its argument numbers with a comma at each power of 1000. |
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exercise3.1
Surface computes an SVG rendering of a 3-D surface function.
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Surface computes an SVG rendering of a 3-D surface function. |
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exercise3.2
Surface computes an SVG rendering of a 3-D surface function.
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Surface computes an SVG rendering of a 3-D surface function. |
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exercise3.3
Surface computes an SVG rendering of a 3-D surface function.
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Surface computes an SVG rendering of a 3-D surface function. |
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exercise3.4
Surface computes an SVG rendering of a 3-D surface function.
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Surface computes an SVG rendering of a 3-D surface function. |
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exercise3.5
Mandelbrot emits a PNG image of the Mandelbrot fractal.
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Mandelbrot emits a PNG image of the Mandelbrot fractal. |
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exercise3.6
Mandelbrot emits a PNG image of the Mandelbrot fractal.
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Mandelbrot emits a PNG image of the Mandelbrot fractal. |
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exercise3.7
Mandelbrot emits a PNG image of the Mandelbrot fractal.
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Mandelbrot emits a PNG image of the Mandelbrot fractal. |
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mandelbrot
Mandelbrot emits a PNG image of the Mandelbrot fractal.
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Mandelbrot emits a PNG image of the Mandelbrot fractal. |
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netflag
Netflag demonstrates an integer type used as a bit field.
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Netflag demonstrates an integer type used as a bit field. |
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printints
Printints demonstrates the use of bytes.Buffer to format a sring.
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Printints demonstrates the use of bytes.Buffer to format a sring. |
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surface
Surface computes an SVG rendering of a 3-D surface function.
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Surface computes an SVG rendering of a 3-D surface function. |
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ch4
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append
Append illustrates the behavior of the built-in append function.
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Append illustrates the behavior of the built-in append function. |
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autoescape
Autoescape demonstrates automatic HTML escaping in html/template.
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Autoescape demonstrates automatic HTML escaping in html/template. |
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charcount
Charcount computes counts of Unicode characters.
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Charcount computes counts of Unicode characters. |
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dedup
Dedup prints only one instance of each line; duplicates are removed.
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Dedup prints only one instance of each line; duplicates are removed. |
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embed
Embed demonstrates basic struct embedding.
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Embed demonstrates basic struct embedding. |
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graph
Graph shows how to use a map of maps to represent a directed graph.
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Graph shows how to use a map of maps to represent a directed graph. |
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issues
Issues prints a table of GitHub issues matching the search terms.
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Issues prints a table of GitHub issues matching the search terms. |
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issueshtml
Issueshtml prints an HTML table of issues matching the search terms.
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Issueshtml prints an HTML table of issues matching the search terms. |
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issuesreport
Issuesreport prints a report of issues matching the search terms.
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Issuesreport prints a report of issues matching the search terms. |
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movie
Movie prints Movies as JSON.
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Movie prints Movies as JSON. |
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nonempty
Nonempty is an example of an in-place slice algorithm.
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Nonempty is an example of an in-place slice algorithm. |
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rev
Rev reverses a slice.
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Rev reverses a slice. |
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sha256
The sha256 command computes the SHA256 hash (an array) of a string.
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The sha256 command computes the SHA256 hash (an array) of a string. |
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treesort
Package treesort provides insertion sort using an unbalanced binary tree.
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Package treesort provides insertion sort using an unbalanced binary tree. |
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ch5
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defer1
Defer1 demonstrates a deferred call being invoked during a panic.
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Defer1 demonstrates a deferred call being invoked during a panic. |
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defer2
Defer2 demonstrates a deferred call to runtime.Stack during a panic.
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Defer2 demonstrates a deferred call to runtime.Stack during a panic. |
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exercise5.6
Surface computes an SVG rendering of a 3-D surface function.
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Surface computes an SVG rendering of a 3-D surface function. |
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fetch
Fetch saves the contents of a URL into a local file.
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Fetch saves the contents of a URL into a local file. |
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findlinks1
Findlinks1 prints the links in an HTML document read from standard inpit.
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Findlinks1 prints the links in an HTML document read from standard inpit. |
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findlinks2
Findlinks2 does an HTTP GET on each URL, parses the result as HTML, and prints the links within it.
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Findlinks2 does an HTTP GET on each URL, parses the result as HTML, and prints the links within it. |
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links
Package links provides a link-extraction function.
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Package links provides a link-extraction function. |
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outline
Outline prints the outline of an HTML document tree.
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Outline prints the outline of an HTML document tree. |
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outline2
Outline prints the outline of an HTML document tree.
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Outline prints the outline of an HTML document tree. |
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squars
The squares program demonstrates a function value with state.
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The squares program demonstrates a function value with state. |
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sum
The sum program demonstrates a variadic function.
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The sum program demonstrates a variadic function. |
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title1
Title1 prints the title of an HTML document specified by a URL.
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Title1 prints the title of an HTML document specified by a URL. |
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title2
Title2 prints the title of an HTML document specified by a URL.
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Title2 prints the title of an HTML document specified by a URL. |
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topsort
The topsort program prints the nodes of a DAG in topological order.
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The topsort program prints the nodes of a DAG in topological order. |
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trace
The trace program uses defer to add entry/exit diagnostics to a function.
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The trace program uses defer to add entry/exit diagnostics to a function. |
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wait
The wait program waits for an HTTP server to start responding.
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The wait program waits for an HTTP server to start responding. |
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ch6
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coloredpoint
Coloredpoint demonstrates struct embeding.
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Coloredpoint demonstrates struct embeding. |
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exercise6.1
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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exercise6.2
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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exercise6.3
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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exercise6.4
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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exercise6.5
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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geometry
Package geometry defines simply types for plane geometry.
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Package geometry defines simply types for plane geometry. |
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intset
Package intset provides a set of integers based on a bit vector.
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Package intset provides a set of integers based on a bit vector. |
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urlvalues
The urlvalues command demonstrates a map type with methods.
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The urlvalues command demonstrates a map type with methods. |
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ch7
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bytecounter
Bytecounter demonstrates an implementation of io.Writer that counts bytes.
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Bytecounter demonstrates an implementation of io.Writer that counts bytes. |
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eval
Package eval provides an expression evaluator.
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Package eval provides an expression evaluator. |
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exercise7.13
Package eval provides an expression evaluator.
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Package eval provides an expression evaluator. |
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exercise7.14
Package eval provides an expression evaluator.
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Package eval provides an expression evaluator. |
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exercise7.15/eval
Package eval provides an expression evaluator.
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Package eval provides an expression evaluator. |
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exercise7.16/eval
Package eval provides an expression evaluator.
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Package eval provides an expression evaluator. |
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exercise7.3
Package treesort provides insertion sort using an unbalanced binary tree.
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Package treesort provides insertion sort using an unbalanced binary tree. |
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exercise7.7
因为 temp 的类型是 *Celsius，而 *Celsius 实现了 String() 方法 所以在调用 fmt.Println(*temp) 会调用 String() 方法
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因为 temp 的类型是 *Celsius，而 *Celsius 实现了 String() 方法 所以在调用 fmt.Println(*temp) 会调用 String() 方法 |
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http1
Http1 is a rudimentary e-commerce server.
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Http1 is a rudimentary e-commerce server. |
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http2
Http2 is an e-commerce server with /list and /price endpoints.
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Http2 is an e-commerce server with /list and /price endpoints. |
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http3
Http3 is an e-commerce server that registers the /list and /price endpoints by calling (*http.ServeMux).Handle.
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Http3 is an e-commerce server that registers the /list and /price endpoints by calling (*http.ServeMux).Handle. |
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http3a
Http3a is an e-commerce server that registers the /list and /price endpoints by calling (*http.ServeMux).HandleFunc.
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Http3a is an e-commerce server that registers the /list and /price endpoints by calling (*http.ServeMux).HandleFunc. |
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http4
Http4 is an e-commerce server that registers the /list and /price endpoint by calling http.HandleFunc.
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Http4 is an e-commerce server that registers the /list and /price endpoint by calling http.HandleFunc. |
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sleep
The sleep program sleeps for a specified period of time.
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The sleep program sleeps for a specified period of time. |
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sorting
Sorting sorts a music playlist into a variety of orders.
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Sorting sorts a music playlist into a variety of orders. |
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surface
The surface program plots the 3-D surface of a user-provided function.
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The surface program plots the 3-D surface of a user-provided function. |
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tempconv
Package tempconv performs Celsius and Fahrenheit temperature computations.
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Package tempconv performs Celsius and Fahrenheit temperature computations. |
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tempflag
Tempflag prints the value of its -temp (temperature) flag.
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Tempflag prints the value of its -temp (temperature) flag. |
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xmlselect
Xmlselect prints the text of selected elements of an XML document.
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Xmlselect prints the text of selected elements of an XML document. |
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ch8
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cake
Package cake provides a simulation of a concurrent cake shop with numerous parameters.
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Package cake provides a simulation of a concurrent cake shop with numerous parameters. |
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chat
Chat is a server that lets clients chat with each other.
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Chat is a server that lets clients chat with each other. |
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clock1
Clock1 is a TCP server that periodically writes the time.
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Clock1 is a TCP server that periodically writes the time. |
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clock2
Clock is a TCP server that periodically writes the time.
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Clock is a TCP server that periodically writes the time. |
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countdown1
Countdown implements the countdown for a rocket launch.
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Countdown implements the countdown for a rocket launch. |
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countdown2
Countdown implements the countdown for a rocket launch.
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Countdown implements the countdown for a rocket launch. |
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countdown3
Countdown implements the countdown for a rocket launch.
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Countdown implements the countdown for a rocket launch. |
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crawl1
Crawl1 crawls web links starting with the command-line arguments.
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Crawl1 crawls web links starting with the command-line arguments. |
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crawl2
Crawl2 crawls web links starting with the command-line arguments.
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Crawl2 crawls web links starting with the command-line arguments. |
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crawl3
Crawl3 crawls web links starting with the command-line arguments.
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Crawl3 crawls web links starting with the command-line arguments. |
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du1
The du1 command computes the disk usage of the files in a directory.
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The du1 command computes the disk usage of the files in a directory. |
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du2
The du2 command computes the disk usage of the files in a directory.
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The du2 command computes the disk usage of the files in a directory. |
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du3
The du3 command computes the disk usage of the files in a directory.
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The du3 command computes the disk usage of the files in a directory. |
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du4
The du4 command computes the disk usage of the files in a directory.
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The du4 command computes the disk usage of the files in a directory. |
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exercise8.10/links
Package links provides a link-extraction function.
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Package links provides a link-extraction function. |
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exercise8.13
Chat is a server that lets clients chat with each other.
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Chat is a server that lets clients chat with each other. |
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exercise8.3
Netcat is a simple read/write client for TCP servers.
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Netcat is a simple read/write client for TCP servers. |
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exercise8.5/mandelbrot
Mandelbrot emits a PNG image of the Mandelbrot fractal.
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Mandelbrot emits a PNG image of the Mandelbrot fractal. |
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netcat1
Netcat1 is a read-only TCP client.
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Netcat1 is a read-only TCP client. |
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netcat2
Netcat is a simple read/write client for TCP servers.
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Netcat is a simple read/write client for TCP servers. |
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netcat3
Netcat is a simple read/write client for TCP servers.
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Netcat is a simple read/write client for TCP servers. |
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pipeline1
Pipeline1 demonstrates an infinite 3-stage pipeline.
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Pipeline1 demonstrates an infinite 3-stage pipeline. |
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pipeline2
Pipeline2 demonstrates a finite 3-stage pipeline.
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Pipeline2 demonstrates a finite 3-stage pipeline. |
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pipeline3
Pipeline3 demonstrates a finite 3-stage pipeline with range, close, and unidirectional channel types.
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Pipeline3 demonstrates a finite 3-stage pipeline with range, close, and unidirectional channel types. |
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reverb1
Rever1 is a TCP server that simulates an echo.
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Rever1 is a TCP server that simulates an echo. |
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reverb2
Rever2 is a TCP server that simulates an echo.
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Rever2 is a TCP server that simulates an echo. |
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spinner
Spinner displays an animation while computing the 45th Fibonacci number.
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Spinner displays an animation while computing the 45th Fibonacci number. |
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thumbnail
The thumbnail command produces thumbnails of JPEG files whose names are provided on each line of the standard input.
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The thumbnail command produces thumbnails of JPEG files whose names are provided on each line of the standard input. |
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thumbnail/thumbnail
The thumbnail package produces thumbnail-size images from larger images.
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The thumbnail package produces thumbnail-size images from larger images. |
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ch9
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bank1
Package bank provides a concurrency-safe bank with one account.
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Package bank provides a concurrency-safe bank with one account. |
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bank2
Package bank provides a concurrency-safe bank with one account.
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Package bank provides a concurrency-safe bank with one account. |
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bank3
Package bank provides a concurrency-safe single-account bank.
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Package bank provides a concurrency-safe single-account bank. |
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exercise9.3/memotest
Package memotest provides common functions for testing various designs of the memo package.
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Package memotest provides common functions for testing various designs of the memo package. |
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exercise9.6/mandelbrot
Mandelbrot emits a PNG image of the Mandelbrot fractal.
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Mandelbrot emits a PNG image of the Mandelbrot fractal. |
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memo1
Package memo provides a concurrency-unsafe memoization of a function of type Func.
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Package memo provides a concurrency-unsafe memoization of a function of type Func. |
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memo2
Package memo provides a concurrency-safe memoization a function of type Func.
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Package memo provides a concurrency-safe memoization a function of type Func. |
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memo3
Package memo provides a concurrency-safe memoization a function of type Func.
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Package memo provides a concurrency-safe memoization a function of type Func. |
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memo4
Package memo provides a concurrency-safe memoization a function of a function.
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Package memo provides a concurrency-safe memoization a function of a function. |
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memo5
Package memo provides a concurrency-safe non-blocking memoization of a function.
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Package memo provides a concurrency-safe non-blocking memoization of a function. |
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memotest
Package memotest provides common functions for testing various designs of the memo package.
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Package memotest provides common functions for testing various designs of the memo package. |
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