2015-12-09 07:57:17 +00:00
<!DOCTYPE HTML>
< html lang = "zh-tw" >
< head >
< meta charset = "UTF-8" >
< meta http-equiv = "X-UA-Compatible" content = "IE=edge" / >
2015-12-31 08:20:27 +00:00
< title > 布爾型 | Go语言圣经< / title >
2015-12-09 07:57:17 +00:00
< meta content = "text/html; charset=utf-8" http-equiv = "Content-Type" >
< meta name = "description" content = "" >
< meta name = "generator" content = "GitBook 2.5.2" >
< meta name = "HandheldFriendly" content = "true" / >
< meta name = "viewport" content = "width=device-width, initial-scale=1, user-scalable=no" >
< meta name = "apple-mobile-web-app-capable" content = "yes" >
< meta name = "apple-mobile-web-app-status-bar-style" content = "black" >
< link rel = "apple-touch-icon-precomposed" sizes = "152x152" href = "../gitbook/images/apple-touch-icon-precomposed-152.png" >
< link rel = "shortcut icon" href = "../gitbook/images/favicon.ico" type = "image/x-icon" >
< link rel = "stylesheet" href = "../gitbook/style.css" >
2015-12-28 08:08:26 +00:00
< link rel = "stylesheet" href = "../gitbook/plugins/gitbook-plugin-katex/katex.min.css" >
2015-12-09 07:57:17 +00:00
< link rel = "stylesheet" href = "../gitbook/plugins/gitbook-plugin-highlight/website.css" >
< link rel = "stylesheet" href = "../gitbook/plugins/gitbook-plugin-fontsettings/website.css" >
< link rel = "next" href = "../ch3/ch3-05.html" / >
< link rel = "prev" href = "../ch3/ch3-03.html" / >
< / head >
< body >
2015-12-31 08:20:27 +00:00
< div class = "book" data-level = "3.4" data-chapter-title = "布爾型" data-filepath = "ch3/ch3-04.md" data-basepath = ".." data-revision = "Thu Dec 31 2015 16:18:40 GMT+0800 (中国标准时间)" >
2015-12-09 07:57:17 +00:00
< div class = "book-summary" >
< nav role = "navigation" >
< ul class = "summary" >
< li class = "chapter " data-level = "0" data-path = "index.html" >
< a href = "../index.html" >
< i class = "fa fa-check" > < / i >
前言
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "0.1" data-path = "ch0/ch0-01.html" >
< a href = "../ch0/ch0-01.html" >
< i class = "fa fa-check" > < / i >
< b > 0.1.< / b >
Go語言起源
< / a >
< / li >
< li class = "chapter " data-level = "0.2" data-path = "ch0/ch0-02.html" >
< a href = "../ch0/ch0-02.html" >
< i class = "fa fa-check" > < / i >
< b > 0.2.< / b >
Go語言項目
< / a >
< / li >
< li class = "chapter " data-level = "0.3" data-path = "ch0/ch0-03.html" >
< a href = "../ch0/ch0-03.html" >
< i class = "fa fa-check" > < / i >
< b > 0.3.< / b >
本書的組織
< / a >
< / li >
< li class = "chapter " data-level = "0.4" data-path = "ch0/ch0-04.html" >
< a href = "../ch0/ch0-04.html" >
< i class = "fa fa-check" > < / i >
< b > 0.4.< / b >
更多的信息
< / a >
< / li >
< li class = "chapter " data-level = "0.5" data-path = "ch0/ch0-05.html" >
< a href = "../ch0/ch0-05.html" >
< i class = "fa fa-check" > < / i >
< b > 0.5.< / b >
2015-12-21 04:55:18 +00:00
致謝
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "1" data-path = "ch1/ch1.html" >
< a href = "../ch1/ch1.html" >
< i class = "fa fa-check" > < / i >
< b > 1.< / b >
入門
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.1" data-path = "ch1/ch1-01.html" >
< a href = "../ch1/ch1-01.html" >
< i class = "fa fa-check" > < / i >
< b > 1.1.< / b >
Hello, World
< / a >
< / li >
< li class = "chapter " data-level = "1.2" data-path = "ch1/ch1-02.html" >
< a href = "../ch1/ch1-02.html" >
< i class = "fa fa-check" > < / i >
< b > 1.2.< / b >
命令行參數
< / a >
< / li >
< li class = "chapter " data-level = "1.3" data-path = "ch1/ch1-03.html" >
< a href = "../ch1/ch1-03.html" >
< i class = "fa fa-check" > < / i >
< b > 1.3.< / b >
2015-12-21 04:55:18 +00:00
査找重複的行
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.4" data-path = "ch1/ch1-04.html" >
< a href = "../ch1/ch1-04.html" >
< i class = "fa fa-check" > < / i >
< b > 1.4.< / b >
2015-12-21 04:55:18 +00:00
GIF動畵
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.5" data-path = "ch1/ch1-05.html" >
< a href = "../ch1/ch1-05.html" >
< i class = "fa fa-check" > < / i >
< b > 1.5.< / b >
2015-12-28 08:08:26 +00:00
獲取URL
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.6" data-path = "ch1/ch1-06.html" >
< a href = "../ch1/ch1-06.html" >
< i class = "fa fa-check" > < / i >
< b > 1.6.< / b >
2015-12-28 08:08:26 +00:00
併發獲取多個URL
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.7" data-path = "ch1/ch1-07.html" >
< a href = "../ch1/ch1-07.html" >
< i class = "fa fa-check" > < / i >
< b > 1.7.< / b >
Web服務
< / a >
< / li >
< li class = "chapter " data-level = "1.8" data-path = "ch1/ch1-08.html" >
< a href = "../ch1/ch1-08.html" >
< i class = "fa fa-check" > < / i >
< b > 1.8.< / b >
本章要點
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "2" data-path = "ch2/ch2.html" >
< a href = "../ch2/ch2.html" >
< i class = "fa fa-check" > < / i >
< b > 2.< / b >
程序結構
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "2.1" data-path = "ch2/ch2-01.html" >
< a href = "../ch2/ch2-01.html" >
< i class = "fa fa-check" > < / i >
< b > 2.1.< / b >
命名
< / a >
< / li >
< li class = "chapter " data-level = "2.2" data-path = "ch2/ch2-02.html" >
< a href = "../ch2/ch2-02.html" >
< i class = "fa fa-check" > < / i >
< b > 2.2.< / b >
聲明
< / a >
< / li >
< li class = "chapter " data-level = "2.3" data-path = "ch2/ch2-03.html" >
< a href = "../ch2/ch2-03.html" >
< i class = "fa fa-check" > < / i >
< b > 2.3.< / b >
變量
< / a >
< / li >
< li class = "chapter " data-level = "2.4" data-path = "ch2/ch2-04.html" >
< a href = "../ch2/ch2-04.html" >
< i class = "fa fa-check" > < / i >
< b > 2.4.< / b >
賦值
< / a >
< / li >
< li class = "chapter " data-level = "2.5" data-path = "ch2/ch2-05.html" >
< a href = "../ch2/ch2-05.html" >
< i class = "fa fa-check" > < / i >
< b > 2.5.< / b >
類型
< / a >
< / li >
< li class = "chapter " data-level = "2.6" data-path = "ch2/ch2-06.html" >
< a href = "../ch2/ch2-06.html" >
< i class = "fa fa-check" > < / i >
< b > 2.6.< / b >
包和文件
< / a >
< / li >
< li class = "chapter " data-level = "2.7" data-path = "ch2/ch2-07.html" >
< a href = "../ch2/ch2-07.html" >
< i class = "fa fa-check" > < / i >
< b > 2.7.< / b >
作用域
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "3" data-path = "ch3/ch3.html" >
< a href = "../ch3/ch3.html" >
< i class = "fa fa-check" > < / i >
< b > 3.< / b >
基礎數據類型
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "3.1" data-path = "ch3/ch3-01.html" >
< a href = "../ch3/ch3-01.html" >
< i class = "fa fa-check" > < / i >
< b > 3.1.< / b >
整型
< / a >
< / li >
< li class = "chapter " data-level = "3.2" data-path = "ch3/ch3-02.html" >
< a href = "../ch3/ch3-02.html" >
< i class = "fa fa-check" > < / i >
< b > 3.2.< / b >
浮點數
< / a >
< / li >
< li class = "chapter " data-level = "3.3" data-path = "ch3/ch3-03.html" >
< a href = "../ch3/ch3-03.html" >
< i class = "fa fa-check" > < / i >
< b > 3.3.< / b >
2015-12-21 04:55:18 +00:00
複數
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter active" data-level = "3.4" data-path = "ch3/ch3-04.html" >
< a href = "../ch3/ch3-04.html" >
< i class = "fa fa-check" > < / i >
< b > 3.4.< / b >
2015-12-21 04:55:18 +00:00
布爾型
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "3.5" data-path = "ch3/ch3-05.html" >
< a href = "../ch3/ch3-05.html" >
< i class = "fa fa-check" > < / i >
< b > 3.5.< / b >
字符串
< / a >
< / li >
< li class = "chapter " data-level = "3.6" data-path = "ch3/ch3-06.html" >
< a href = "../ch3/ch3-06.html" >
< i class = "fa fa-check" > < / i >
< b > 3.6.< / b >
常量
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "4" data-path = "ch4/ch4.html" >
< a href = "../ch4/ch4.html" >
< i class = "fa fa-check" > < / i >
< b > 4.< / b >
2015-12-21 04:55:18 +00:00
複合數據類型
2015-12-09 07:57:17 +00:00
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "4.1" data-path = "ch4/ch4-01.html" >
< a href = "../ch4/ch4-01.html" >
< i class = "fa fa-check" > < / i >
< b > 4.1.< / b >
數組
< / a >
< / li >
< li class = "chapter " data-level = "4.2" data-path = "ch4/ch4-02.html" >
< a href = "../ch4/ch4-02.html" >
< i class = "fa fa-check" > < / i >
< b > 4.2.< / b >
2015-12-31 08:20:27 +00:00
Slice
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "4.3" data-path = "ch4/ch4-03.html" >
< a href = "../ch4/ch4-03.html" >
< i class = "fa fa-check" > < / i >
< b > 4.3.< / b >
2015-12-31 08:20:27 +00:00
Map
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "4.4" data-path = "ch4/ch4-04.html" >
< a href = "../ch4/ch4-04.html" >
< i class = "fa fa-check" > < / i >
< b > 4.4.< / b >
結構體
< / a >
< / li >
< li class = "chapter " data-level = "4.5" data-path = "ch4/ch4-05.html" >
< a href = "../ch4/ch4-05.html" >
< i class = "fa fa-check" > < / i >
< b > 4.5.< / b >
JSON
< / a >
< / li >
< li class = "chapter " data-level = "4.6" data-path = "ch4/ch4-06.html" >
< a href = "../ch4/ch4-06.html" >
< i class = "fa fa-check" > < / i >
< b > 4.6.< / b >
文本和HTML模闆
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "5" data-path = "ch5/ch5.html" >
< a href = "../ch5/ch5.html" >
< i class = "fa fa-check" > < / i >
< b > 5.< / b >
函數
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "5.1" data-path = "ch5/ch5-01.html" >
< a href = "../ch5/ch5-01.html" >
< i class = "fa fa-check" > < / i >
< b > 5.1.< / b >
函數聲明
< / a >
< / li >
< li class = "chapter " data-level = "5.2" data-path = "ch5/ch5-02.html" >
< a href = "../ch5/ch5-02.html" >
< i class = "fa fa-check" > < / i >
< b > 5.2.< / b >
遞歸
< / a >
< / li >
< li class = "chapter " data-level = "5.3" data-path = "ch5/ch5-03.html" >
< a href = "../ch5/ch5-03.html" >
< i class = "fa fa-check" > < / i >
< b > 5.3.< / b >
多返迴值
< / a >
< / li >
< li class = "chapter " data-level = "5.4" data-path = "ch5/ch5-04.html" >
< a href = "../ch5/ch5-04.html" >
< i class = "fa fa-check" > < / i >
< b > 5.4.< / b >
錯誤
< / a >
< / li >
< li class = "chapter " data-level = "5.5" data-path = "ch5/ch5-05.html" >
< a href = "../ch5/ch5-05.html" >
< i class = "fa fa-check" > < / i >
< b > 5.5.< / b >
函數值
< / a >
< / li >
< li class = "chapter " data-level = "5.6" data-path = "ch5/ch5-06.html" >
< a href = "../ch5/ch5-06.html" >
< i class = "fa fa-check" > < / i >
< b > 5.6.< / b >
匿名函數
< / a >
< / li >
< li class = "chapter " data-level = "5.7" data-path = "ch5/ch5-07.html" >
< a href = "../ch5/ch5-07.html" >
< i class = "fa fa-check" > < / i >
< b > 5.7.< / b >
可變參數
< / a >
< / li >
< li class = "chapter " data-level = "5.8" data-path = "ch5/ch5-08.html" >
< a href = "../ch5/ch5-08.html" >
< i class = "fa fa-check" > < / i >
< b > 5.8.< / b >
Deferred函數
< / a >
< / li >
< li class = "chapter " data-level = "5.9" data-path = "ch5/ch5-09.html" >
< a href = "../ch5/ch5-09.html" >
< i class = "fa fa-check" > < / i >
< b > 5.9.< / b >
Panic異常
< / a >
< / li >
< li class = "chapter " data-level = "5.10" data-path = "ch5/ch5-10.html" >
< a href = "../ch5/ch5-10.html" >
< i class = "fa fa-check" > < / i >
< b > 5.10.< / b >
2015-12-28 08:08:26 +00:00
Recover捕獲異常
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "6" data-path = "ch6/ch6.html" >
< a href = "../ch6/ch6.html" >
< i class = "fa fa-check" > < / i >
< b > 6.< / b >
方法
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "6.1" data-path = "ch6/ch6-01.html" >
< a href = "../ch6/ch6-01.html" >
< i class = "fa fa-check" > < / i >
< b > 6.1.< / b >
方法聲明
< / a >
< / li >
< li class = "chapter " data-level = "6.2" data-path = "ch6/ch6-02.html" >
< a href = "../ch6/ch6-02.html" >
< i class = "fa fa-check" > < / i >
< b > 6.2.< / b >
2015-12-21 04:55:18 +00:00
基於指針對象的方法
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "6.3" data-path = "ch6/ch6-03.html" >
< a href = "../ch6/ch6-03.html" >
< i class = "fa fa-check" > < / i >
< b > 6.3.< / b >
通過嵌入結構體來擴展類型
< / a >
< / li >
< li class = "chapter " data-level = "6.4" data-path = "ch6/ch6-04.html" >
< a href = "../ch6/ch6-04.html" >
< i class = "fa fa-check" > < / i >
< b > 6.4.< / b >
2015-12-21 04:55:18 +00:00
方法值和方法表達式
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "6.5" data-path = "ch6/ch6-05.html" >
< a href = "../ch6/ch6-05.html" >
< i class = "fa fa-check" > < / i >
< b > 6.5.< / b >
示例: Bit數組
< / a >
< / li >
< li class = "chapter " data-level = "6.6" data-path = "ch6/ch6-06.html" >
< a href = "../ch6/ch6-06.html" >
< i class = "fa fa-check" > < / i >
< b > 6.6.< / b >
封裝
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "7" data-path = "ch7/ch7.html" >
< a href = "../ch7/ch7.html" >
< i class = "fa fa-check" > < / i >
< b > 7.< / b >
接口
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "7.1" data-path = "ch7/ch7-01.html" >
< a href = "../ch7/ch7-01.html" >
< i class = "fa fa-check" > < / i >
< b > 7.1.< / b >
2015-12-21 04:55:18 +00:00
接口是合約
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "7.2" data-path = "ch7/ch7-02.html" >
< a href = "../ch7/ch7-02.html" >
< i class = "fa fa-check" > < / i >
< b > 7.2.< / b >
接口類型
< / a >
< / li >
< li class = "chapter " data-level = "7.3" data-path = "ch7/ch7-03.html" >
< a href = "../ch7/ch7-03.html" >
< i class = "fa fa-check" > < / i >
< b > 7.3.< / b >
實現接口的條件
< / a >
< / li >
< li class = "chapter " data-level = "7.4" data-path = "ch7/ch7-04.html" >
< a href = "../ch7/ch7-04.html" >
< i class = "fa fa-check" > < / i >
< b > 7.4.< / b >
flag.Value接口
< / a >
< / li >
< li class = "chapter " data-level = "7.5" data-path = "ch7/ch7-05.html" >
< a href = "../ch7/ch7-05.html" >
< i class = "fa fa-check" > < / i >
< b > 7.5.< / b >
接口值
< / a >
< / li >
< li class = "chapter " data-level = "7.6" data-path = "ch7/ch7-06.html" >
< a href = "../ch7/ch7-06.html" >
< i class = "fa fa-check" > < / i >
< b > 7.6.< / b >
sort.Interface接口
< / a >
< / li >
< li class = "chapter " data-level = "7.7" data-path = "ch7/ch7-07.html" >
< a href = "../ch7/ch7-07.html" >
< i class = "fa fa-check" > < / i >
< b > 7.7.< / b >
http.Handler接口
< / a >
< / li >
< li class = "chapter " data-level = "7.8" data-path = "ch7/ch7-08.html" >
< a href = "../ch7/ch7-08.html" >
< i class = "fa fa-check" > < / i >
< b > 7.8.< / b >
error接口
< / a >
< / li >
< li class = "chapter " data-level = "7.9" data-path = "ch7/ch7-09.html" >
< a href = "../ch7/ch7-09.html" >
< i class = "fa fa-check" > < / i >
< b > 7.9.< / b >
2015-12-21 04:55:18 +00:00
示例: 表達式求值
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "7.10" data-path = "ch7/ch7-10.html" >
< a href = "../ch7/ch7-10.html" >
< i class = "fa fa-check" > < / i >
< b > 7.10.< / b >
類型斷言
< / a >
< / li >
< li class = "chapter " data-level = "7.11" data-path = "ch7/ch7-11.html" >
< a href = "../ch7/ch7-11.html" >
< i class = "fa fa-check" > < / i >
< b > 7.11.< / b >
2015-12-21 04:55:18 +00:00
基於類型斷言識别錯誤類型
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "7.12" data-path = "ch7/ch7-12.html" >
< a href = "../ch7/ch7-12.html" >
< i class = "fa fa-check" > < / i >
< b > 7.12.< / b >
通過類型斷言査詢接口
< / a >
< / li >
< li class = "chapter " data-level = "7.13" data-path = "ch7/ch7-13.html" >
< a href = "../ch7/ch7-13.html" >
< i class = "fa fa-check" > < / i >
< b > 7.13.< / b >
類型分支
< / a >
< / li >
< li class = "chapter " data-level = "7.14" data-path = "ch7/ch7-14.html" >
< a href = "../ch7/ch7-14.html" >
< i class = "fa fa-check" > < / i >
< b > 7.14.< / b >
示例: 基於標記的XML解碼
< / a >
< / li >
< li class = "chapter " data-level = "7.15" data-path = "ch7/ch7-15.html" >
< a href = "../ch7/ch7-15.html" >
< i class = "fa fa-check" > < / i >
< b > 7.15.< / b >
補充幾點
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "8" data-path = "ch8/ch8.html" >
< a href = "../ch8/ch8.html" >
< i class = "fa fa-check" > < / i >
< b > 8.< / b >
Goroutines和Channels
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "8.1" data-path = "ch8/ch8-01.html" >
< a href = "../ch8/ch8-01.html" >
< i class = "fa fa-check" > < / i >
< b > 8.1.< / b >
Goroutines
< / a >
< / li >
< li class = "chapter " data-level = "8.2" data-path = "ch8/ch8-02.html" >
< a href = "../ch8/ch8-02.html" >
< i class = "fa fa-check" > < / i >
< b > 8.2.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的Clock服務
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.3" data-path = "ch8/ch8-03.html" >
< a href = "../ch8/ch8-03.html" >
< i class = "fa fa-check" > < / i >
< b > 8.3.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的Echo服務
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.4" data-path = "ch8/ch8-04.html" >
< a href = "../ch8/ch8-04.html" >
< i class = "fa fa-check" > < / i >
< b > 8.4.< / b >
Channels
< / a >
< / li >
< li class = "chapter " data-level = "8.5" data-path = "ch8/ch8-05.html" >
< a href = "../ch8/ch8-05.html" >
< i class = "fa fa-check" > < / i >
< b > 8.5.< / b >
併行的循環
< / a >
< / li >
< li class = "chapter " data-level = "8.6" data-path = "ch8/ch8-06.html" >
< a href = "../ch8/ch8-06.html" >
< i class = "fa fa-check" > < / i >
< b > 8.6.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的Web爬蟲
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.7" data-path = "ch8/ch8-07.html" >
< a href = "../ch8/ch8-07.html" >
< i class = "fa fa-check" > < / i >
< b > 8.7.< / b >
2015-12-21 04:55:18 +00:00
基於select的多路複用
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.8" data-path = "ch8/ch8-08.html" >
< a href = "../ch8/ch8-08.html" >
< i class = "fa fa-check" > < / i >
< b > 8.8.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的字典遍歷
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.9" data-path = "ch8/ch8-09.html" >
< a href = "../ch8/ch8-09.html" >
< i class = "fa fa-check" > < / i >
< b > 8.9.< / b >
2015-12-28 08:08:26 +00:00
併發的退出
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.10" data-path = "ch8/ch8-10.html" >
< a href = "../ch8/ch8-10.html" >
< i class = "fa fa-check" > < / i >
< b > 8.10.< / b >
示例: 聊天服務
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "9" data-path = "ch9/ch9.html" >
< a href = "../ch9/ch9.html" >
< i class = "fa fa-check" > < / i >
< b > 9.< / b >
2015-12-21 04:55:18 +00:00
基於共享變量的併發
2015-12-09 07:57:17 +00:00
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "9.1" data-path = "ch9/ch9-01.html" >
< a href = "../ch9/ch9-01.html" >
< i class = "fa fa-check" > < / i >
< b > 9.1.< / b >
競爭條件
< / a >
< / li >
< li class = "chapter " data-level = "9.2" data-path = "ch9/ch9-02.html" >
< a href = "../ch9/ch9-02.html" >
< i class = "fa fa-check" > < / i >
< b > 9.2.< / b >
sync.Mutex互斥鎖
< / a >
< / li >
< li class = "chapter " data-level = "9.3" data-path = "ch9/ch9-03.html" >
< a href = "../ch9/ch9-03.html" >
< i class = "fa fa-check" > < / i >
< b > 9.3.< / b >
sync.RWMutex讀寫鎖
< / a >
< / li >
< li class = "chapter " data-level = "9.4" data-path = "ch9/ch9-04.html" >
< a href = "../ch9/ch9-04.html" >
< i class = "fa fa-check" > < / i >
< b > 9.4.< / b >
2015-12-21 04:55:18 +00:00
內存同步
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "9.5" data-path = "ch9/ch9-05.html" >
< a href = "../ch9/ch9-05.html" >
< i class = "fa fa-check" > < / i >
< b > 9.5.< / b >
sync.Once初始化
< / a >
< / li >
< li class = "chapter " data-level = "9.6" data-path = "ch9/ch9-06.html" >
< a href = "../ch9/ch9-06.html" >
< i class = "fa fa-check" > < / i >
< b > 9.6.< / b >
競爭條件檢測
< / a >
< / li >
< li class = "chapter " data-level = "9.7" data-path = "ch9/ch9-07.html" >
< a href = "../ch9/ch9-07.html" >
< i class = "fa fa-check" > < / i >
< b > 9.7.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的非阻塞緩存
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "9.8" data-path = "ch9/ch9-08.html" >
< a href = "../ch9/ch9-08.html" >
< i class = "fa fa-check" > < / i >
< b > 9.8.< / b >
2015-12-21 04:55:18 +00:00
Goroutines和線程
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "10" data-path = "ch10/ch10.html" >
< a href = "../ch10/ch10.html" >
< i class = "fa fa-check" > < / i >
< b > 10.< / b >
包和工具
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "10.1" data-path = "ch10/ch10-01.html" >
< a href = "../ch10/ch10-01.html" >
< i class = "fa fa-check" > < / i >
< b > 10.1.< / b >
簡介
< / a >
< / li >
< li class = "chapter " data-level = "10.2" data-path = "ch10/ch10-02.html" >
< a href = "../ch10/ch10-02.html" >
< i class = "fa fa-check" > < / i >
< b > 10.2.< / b >
導入路徑
< / a >
< / li >
< li class = "chapter " data-level = "10.3" data-path = "ch10/ch10-03.html" >
< a href = "../ch10/ch10-03.html" >
< i class = "fa fa-check" > < / i >
< b > 10.3.< / b >
包聲明
< / a >
< / li >
< li class = "chapter " data-level = "10.4" data-path = "ch10/ch10-04.html" >
< a href = "../ch10/ch10-04.html" >
< i class = "fa fa-check" > < / i >
< b > 10.4.< / b >
導入聲明
< / a >
< / li >
< li class = "chapter " data-level = "10.5" data-path = "ch10/ch10-05.html" >
< a href = "../ch10/ch10-05.html" >
< i class = "fa fa-check" > < / i >
< b > 10.5.< / b >
匿名導入
< / a >
< / li >
< li class = "chapter " data-level = "10.6" data-path = "ch10/ch10-06.html" >
< a href = "../ch10/ch10-06.html" >
< i class = "fa fa-check" > < / i >
< b > 10.6.< / b >
包和命名
< / a >
< / li >
< li class = "chapter " data-level = "10.7" data-path = "ch10/ch10-07.html" >
< a href = "../ch10/ch10-07.html" >
< i class = "fa fa-check" > < / i >
< b > 10.7.< / b >
工具
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "11" data-path = "ch11/ch11.html" >
< a href = "../ch11/ch11.html" >
< i class = "fa fa-check" > < / i >
< b > 11.< / b >
測試
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "11.1" data-path = "ch11/ch11-01.html" >
< a href = "../ch11/ch11-01.html" >
< i class = "fa fa-check" > < / i >
< b > 11.1.< / b >
go test
< / a >
< / li >
< li class = "chapter " data-level = "11.2" data-path = "ch11/ch11-02.html" >
< a href = "../ch11/ch11-02.html" >
< i class = "fa fa-check" > < / i >
< b > 11.2.< / b >
測試函數
< / a >
< / li >
< li class = "chapter " data-level = "11.3" data-path = "ch11/ch11-03.html" >
< a href = "../ch11/ch11-03.html" >
< i class = "fa fa-check" > < / i >
< b > 11.3.< / b >
測試覆蓋率
< / a >
< / li >
< li class = "chapter " data-level = "11.4" data-path = "ch11/ch11-04.html" >
< a href = "../ch11/ch11-04.html" >
< i class = "fa fa-check" > < / i >
< b > 11.4.< / b >
基準測試
< / a >
< / li >
< li class = "chapter " data-level = "11.5" data-path = "ch11/ch11-05.html" >
< a href = "../ch11/ch11-05.html" >
< i class = "fa fa-check" > < / i >
< b > 11.5.< / b >
剖析
< / a >
< / li >
< li class = "chapter " data-level = "11.6" data-path = "ch11/ch11-06.html" >
< a href = "../ch11/ch11-06.html" >
< i class = "fa fa-check" > < / i >
< b > 11.6.< / b >
示例函數
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "12" data-path = "ch12/ch12.html" >
< a href = "../ch12/ch12.html" >
< i class = "fa fa-check" > < / i >
< b > 12.< / b >
反射
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "12.1" data-path = "ch12/ch12-01.html" >
< a href = "../ch12/ch12-01.html" >
< i class = "fa fa-check" > < / i >
< b > 12.1.< / b >
2015-12-21 04:55:18 +00:00
爲何需要反射?
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.2" data-path = "ch12/ch12-02.html" >
< a href = "../ch12/ch12-02.html" >
< i class = "fa fa-check" > < / i >
< b > 12.2.< / b >
reflect.Type和reflect.Value
< / a >
< / li >
< li class = "chapter " data-level = "12.3" data-path = "ch12/ch12-03.html" >
< a href = "../ch12/ch12-03.html" >
< i class = "fa fa-check" > < / i >
< b > 12.3.< / b >
Display遞歸打印
< / a >
< / li >
< li class = "chapter " data-level = "12.4" data-path = "ch12/ch12-04.html" >
< a href = "../ch12/ch12-04.html" >
< i class = "fa fa-check" > < / i >
< b > 12.4.< / b >
2015-12-21 04:55:18 +00:00
示例: 編碼S表達式
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.5" data-path = "ch12/ch12-05.html" >
< a href = "../ch12/ch12-05.html" >
< i class = "fa fa-check" > < / i >
< b > 12.5.< / b >
通過reflect.Value脩改值
< / a >
< / li >
< li class = "chapter " data-level = "12.6" data-path = "ch12/ch12-06.html" >
< a href = "../ch12/ch12-06.html" >
< i class = "fa fa-check" > < / i >
< b > 12.6.< / b >
2015-12-21 04:55:18 +00:00
示例: 解碼S表達式
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.7" data-path = "ch12/ch12-07.html" >
< a href = "../ch12/ch12-07.html" >
< i class = "fa fa-check" > < / i >
< b > 12.7.< / b >
2015-12-28 08:08:26 +00:00
獲取結構體字段標識
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.8" data-path = "ch12/ch12-08.html" >
< a href = "../ch12/ch12-08.html" >
< i class = "fa fa-check" > < / i >
< b > 12.8.< / b >
顯示一個類型的方法集
< / a >
< / li >
< li class = "chapter " data-level = "12.9" data-path = "ch12/ch12-09.html" >
< a href = "../ch12/ch12-09.html" >
< i class = "fa fa-check" > < / i >
< b > 12.9.< / b >
幾點忠告
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "13" data-path = "ch13/ch13.html" >
< a href = "../ch13/ch13.html" >
< i class = "fa fa-check" > < / i >
< b > 13.< / b >
底層編程
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "13.1" data-path = "ch13/ch13-01.html" >
< a href = "../ch13/ch13-01.html" >
< i class = "fa fa-check" > < / i >
< b > 13.1.< / b >
unsafe.Sizeof, Alignof 和 Offsetof
< / a >
< / li >
< li class = "chapter " data-level = "13.2" data-path = "ch13/ch13-02.html" >
< a href = "../ch13/ch13-02.html" >
< i class = "fa fa-check" > < / i >
< b > 13.2.< / b >
unsafe.Pointer
< / a >
< / li >
< li class = "chapter " data-level = "13.3" data-path = "ch13/ch13-03.html" >
< a href = "../ch13/ch13-03.html" >
< i class = "fa fa-check" > < / i >
< b > 13.3.< / b >
示例: 深度相等判斷
< / a >
< / li >
< li class = "chapter " data-level = "13.4" data-path = "ch13/ch13-04.html" >
< a href = "../ch13/ch13-04.html" >
< i class = "fa fa-check" > < / i >
< b > 13.4.< / b >
通過cgo調用C代碼
< / a >
< / li >
< li class = "chapter " data-level = "13.5" data-path = "ch13/ch13-05.html" >
< a href = "../ch13/ch13-05.html" >
< i class = "fa fa-check" > < / i >
< b > 13.5.< / b >
幾點忠告
< / a >
< / li >
< / ul >
< / li >
2015-12-24 06:47:06 +00:00
< li class = "chapter " data-level = "14" data-path = "CONTRIBUTORS.html" >
2015-12-09 07:57:17 +00:00
2015-12-24 06:47:06 +00:00
< a href = "../CONTRIBUTORS.html" >
2015-12-09 07:57:17 +00:00
< i class = "fa fa-check" > < / i >
2015-12-21 04:55:18 +00:00
< b > 14.< / b >
2015-12-09 07:57:17 +00:00
2015-12-24 06:47:06 +00:00
附録
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "divider" > < / li >
< li >
< a href = "https://www.gitbook.com" target = "blank" class = "gitbook-link" >
本書使用 GitBook 釋出
< / a >
< / li >
< / ul >
< / nav >
< / div >
< div class = "book-body" >
< div class = "body-inner" >
< div class = "book-header" role = "navigation" >
<!-- Actions Left -->
<!-- Title -->
< h1 >
< i class = "fa fa-circle-o-notch fa-spin" > < / i >
2015-12-31 08:20:27 +00:00
< a href = "../" > Go语言圣经< / a >
2015-12-09 07:57:17 +00:00
< / h1 >
< / div >
< div class = "page-wrapper" tabindex = "-1" role = "main" >
< div class = "page-inner" >
< section class = "normal" id = "section-" >
2015-12-21 04:55:18 +00:00
< h2 id = "34-布爾型" > 3.4. 布 爾 型 < / h2 >
2015-12-28 08:08:26 +00:00
< p > 一 個 布 爾 類 型 的 值 隻 有 兩 種 ： true和 false。 if和 for語 句 的 條 件 部 分 都 是 布 爾 類 型 的 值 ， 併 且 ==和 < 等 比 較 操 作 也 會 産 生 布 爾 型 的 值 。 一 元 操 作 符 < code > !< / code > 對 應 邏 輯 非 操 作 ， 因 此 < code > !true< / code > 的 值 爲 < code > false< / code > ， 更 羅 嗦 的 説 法 是 < code > (!true==false)==true< / code > ， 雖 然 表 達 方 式 不 一 樣 ， 不 過 我 們 一 般 會 采 用 簡 潔 的 布 爾 表 達 式 ， 就 像 用 x來 表 示 < code > x==true< / code > 。 < / p >
< p > 布 爾 值 可 以 和 & & （ AND） 和 ||（ OR） 操 作 符 結 合 ， 併 且 可 能 會 有 短 路 行 爲 ： 如 果 運 算 符 左 邊 值 已 經 可 以 確 定 整 個 布 爾 表 達 式 的 值 ， 那 麽 運 算 符 右 邊 的 值 將 不 在 被 求 值 ， 因 此 下 面 的 表 達 式 總 是 安 全 的 ： < / p >
2015-12-21 04:55:18 +00:00
< pre > < code class = "lang-Go" > s != < span class = "hljs-string" > " " < / span > & & s[< span class = "hljs-number" > 0< / span > ] == < span class = "hljs-string" > ' x' < / span >
< / code > < / pre >
2015-12-28 08:08:26 +00:00
< p > 其 中 s[0]操 作 如 果 應 用 於 空 字 符 串 將 會 導 致 panic異 常 。 < / p >
< p > 因 爲 < code > & & < / code > 的 優 先 級 比 < code > ||< / code > 高 （ 助 記 ： < code > & & < / code > 對 應 邏 輯 乘 法 ， < code > ||< / code > 對 應 邏 輯 加 法 ， 乘 法 比 加 法 優 先 級 要 高 ） ， 下 面 形 式 的 布 爾 表 達 式 是 不 需 要 加 小 括 弧 的 ： < / p >
2015-12-21 04:55:18 +00:00
< pre > < code class = "lang-Go" > < span class = "hljs-keyword" > if< / span > < span class = "hljs-string" > ' a' < / span > < = c & & c < = < span class = "hljs-string" > ' z' < / span > ||
< span class = "hljs-string" > ' A' < / span > < = c & & c < = < span class = "hljs-string" > ' Z' < / span > ||
< span class = "hljs-string" > ' 0' < / span > < = c & & c < = < span class = "hljs-string" > ' 9' < / span > {
< span class = "hljs-comment" > // ...ASCII letter or digit...< / span >
}
< / code > < / pre >
2015-12-28 08:08:26 +00:00
< p > 布 爾 值 併 不 會 隱 式 轉 換 爲 數 字 值 0或 1， 反 之 亦 然 。 必 鬚 使 用 一 個 顯 式 的 if語 句 輔 助 轉 換 ： < / p >
2015-12-21 04:55:18 +00:00
< pre > < code class = "lang-Go" > i := < span class = "hljs-number" > 0< / span >
< span class = "hljs-keyword" > if< / span > b {
i = < span class = "hljs-number" > 1< / span >
}
< / code > < / pre >
< p > 如 果 需 要 經 常 做 類 似 的 轉 換 , 包 裝 成 一 個 函 數 會 更 方 便 :< / p >
< pre > < code class = "lang-Go" > < span class = "hljs-comment" > // btoi returns 1 if b is true and 0 if false.< / span >
< span class = "hljs-keyword" > func< / span > btoi(b < span class = "hljs-typename" > bool< / span > ) < span class = "hljs-typename" > int< / span > {
< span class = "hljs-keyword" > if< / span > b {
< span class = "hljs-keyword" > return< / span > < span class = "hljs-number" > 1< / span >
}
< span class = "hljs-keyword" > return< / span > < span class = "hljs-number" > 0< / span >
}
< / code > < / pre >
< p > 數 字 到 布 爾 型 的 逆 轉 換 則 非 常 簡 單 , 不 過 爲 了 保 持 對 稱 , 我 們 也 可 以 包 裝 一 個 函 數 :< / p >
< pre > < code class = "lang-Go" > < span class = "hljs-comment" > // itob reports whether i is non-zero.< / span >
< span class = "hljs-keyword" > func< / span > itob(i < span class = "hljs-typename" > int< / span > ) < span class = "hljs-typename" > bool< / span > { < span class = "hljs-keyword" > return< / span > i != < span class = "hljs-number" > 0< / span > }
< / code > < / pre >
2015-12-09 07:57:17 +00:00
< / section >
< / div >
< / div >
< / div >
2015-12-21 04:55:18 +00:00
< a href = "../ch3/ch3-03.html" class = "navigation navigation-prev " aria-label = "Previous page: 複數" > < i class = "fa fa-angle-left" > < / i > < / a >
2015-12-09 07:57:17 +00:00
< a href = "../ch3/ch3-05.html" class = "navigation navigation-next " aria-label = "Next page: 字符串" > < i class = "fa fa-angle-right" > < / i > < / a >
< / div >
< / div >
< script src = "../gitbook/app.js" > < / script >
< script src = "../gitbook/plugins/gitbook-plugin-sharing/buttons.js" > < / script >
< script src = "../gitbook/plugins/gitbook-plugin-fontsettings/buttons.js" > < / script >
< script >
require(["gitbook"], function(gitbook) {
2015-12-28 08:08:26 +00:00
var config = {"katex":{},"highlight":{},"sharing":{"facebook":true,"twitter":true,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","twitter","weibo","instapaper"]},"fontsettings":{"theme":"white","family":"sans","size":2}};
2015-12-09 07:57:17 +00:00
gitbook.start(config);
});
< / script >
< / body >
< / html >
