Scala编程（第3版）

序 ........................................................................................................XXIV

致谢 .....................................................................................................XXVI

引言 .....................................................................................................XXIX

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 .................................................................