Scala编程（第4版）

序 .........................................................................................................XXII
致谢 .....................................................................................................XXIV
引言 ....................................................................................................XXVII
第1章 一门可伸缩的语言 ..........................................................................1
1.1　一门按需伸缩的语言 ..................................................................... 2
1.2　是什么让Scala能屈能伸 ................................................................. 7
1.3　为什么要用Scala ...........................................................................11
1.4　Scala寻根 ..................................................................................... 17
1.5　结语 ............................................................................................. 19
第2章 Scala入门 ....................................................................................20
第1步　使用Scala解释器 ..................................................................... 21
第2步　定义变量 ................................................................................. 22
第3步　定义函数 ................................................................................. 24
第4步　编写Scala脚本 ......................................................................... 26
第5步　用while做循环；用if做判断 .................................................... 27
第6步　用foreach和for遍历 ................................................................. 30
结语 ...................................................................................................... 32
第3章 Scala入门（续） ..........................................................................33
第7步　用类型参数化数组 .................................................................. 33
第8步　使用列表 ................................................................................. 38
第9步　使用元组 ................................................................................. 42
第10步　使用集和映射 ........................................................................ 43
第11步 　 识别函数式编程风格 ............................................................. 48
第12步 　 从文件读取文本行 ................................................................. 51
结语 ...................................................................................................... 55
第4章 类和对象 ......................................................................................56
4.1　类、字段和方法 ........................................................................... 56
4.2　分号推断 ...................................................................................... 61
4.3　单例对象 ...................................................................................... 62
4.4　Scala应用程序 ............................................................................. 65
4.5　App特质 ....................................................................................... 68
4.6　结语 ............................................................................................. 68
第5章 基础类型和操作 ............................................................................69
5.1　一些基础类型 .............................................................................. 69
5.2　字面量 .......................................................................................... 70
5.3　字符串插值 .................................................................................. 77
5.4　操作符即方法 .............................................................................. 78
5.5　算术操作 ...................................................................................... 81
5.6　关系和逻辑操作 ........................................................................... 83
5.7　位运算操作 .................................................................................. 85
5.8　对象相等性 .................................................................................. 86
5.9　操作符优先级和结合性 ............................................................... 88
5.10　富包装类 .................................................................................... 91
5.11　结语............................................................................................ 91
第6章 函数式对象 ...................................................................................93
6.1　Rational类的规格定义 ................................................................. 93
6.2　构建Rational ................................................................................ 94
6.3　重新实现toString方法 .................................................................. 96
6.4　检查前置条件 .............................................................................. 97
6.5　添加字段 ...................................................................................... 98
6.6　自引用 .........................................................................................100
6.7　辅助构造方法 .............................................................................101
6.8　私有字段和方法 ..........................................................................102
6.9　定义操作符 .................................................................................104
6.10　Scala中的标识符 .......................................................................106
6.11　方法重载 ...................................................................................108
6.12　隐式转换 ...................................................................................111
6.13　注意事项 ...................................................................................112
6.14　结语 ..........................................................................................112
第7章 内建的控制结构 ..........................................................................114
7.1　if表达式 ......................................................................................115
7.2　while循环 ....................................................................................116
7.3　for表达式 ....................................................................................119
7.4　用try表达式实现异常处理 ..........................................................125
7.5　match表达式 ...............................................................................129
7.6　没有break和continue的日子 ........................................................131
7.7　变量作用域 .................................................................................134
7.8　对指令式代码进行重构 ..............................................................137
7.9　结语 ............................................................................................139
第8章 函数和闭包 .................................................................................140
8.1　方法 ............................................................................................140
8.2　局部函数 .....................................................................................142
8.3　一等函数 .....................................................................................144
8.4　函数字面量的简写形式 ..............................................................147
8.5　占位符语法 .................................................................................147
8.6　部分应用的函数 ..........................................................................149
8.7　闭包 ...................