fix 2.4 collection types
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stanzhai
@ -27,42 +27,59 @@ lifedim说他平时12点就会睡，1点47分，发给我校对后的文档。
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全体人员名单（排名不分先后）：
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- numbbbbb
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- coverxit
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- wh1100717
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- TimothyYe
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- honghaoz
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- Hawstein
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- JaySurplus
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- stanzhai
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- lyuka
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- geek5nan
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- xielingwang
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- yankuangshi
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- dabing1022
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- siemenliu
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- fd5788
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- youkugems
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- haolloyin
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- superkam
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- vclwei
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- sg552
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- bzsy
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- pyanfield
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- ericzyh
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- 088haizi
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- viztor
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- pp-prog
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- baocaixiong
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- marsprince
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- shinyzhu
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- happyming
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- menlongsheng
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- zq54zquan
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- Evilcome
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- lslxdx
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- yeahdongcn
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- zqp
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- xiehurricane
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- Jasonbroker
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- aquaporcus
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- [numbbbbb](https://github.com/numbbbbb)
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- [stanzhai](https://github.com/stanzhai)
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- [coverxit](https://github.com/coverxit)
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- [wh1100717](https://github.com/wh1100717)
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- [TimothyYe](https://github.com/TimothyYe)
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- [honghaoz](https://github.com/honghaoz)
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- [lyuka](https://github.com/lyuka)
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- [JaySurplus](https://github.com/JaySurplus)
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- [Hawstein](https://github.com/Hawstein)
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- [geek5nan](https://github.com/geek5nan)
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- [yankuangshi](https://github.com/yankuangshi)
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- [xielingwang](https://github.com/xielingwang)
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- [yulingtianxia](https://github.com/yulingtianxia)
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- [twlkyao](https://github.com/twlkyao)
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- [dabing1022](https://github.com/dabing1022)
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- [vclwei](https://github.com/vclwei)
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- [fd5788](https://github.com/fd5788)
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- [siemenliu](https://github.com/siemenliu)
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- [youkugems](https://github.com/youkugems)
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- [haolloyin](https://github.com/haolloyin)
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- [wxstars](https://github.com/wxstars)
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- [IceskYsl](https://github.com/IceskYsl)
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- [sg552](https://github.com/sg552)
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- [superkam](https://github.com/superkam)
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- [zac1st1k](https://github.com/zac1st1k)
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- [bzsy](https://github.com/bzsy)
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- [pyanfield](https://github.com/pyanfield)
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- [ericzyh](https://github.com/ericzyh)
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- [peiyucn](https://github.com/peiyucn)
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- [sunfiled](https://github.com/sunfiled)
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- [lzw120](https://github.com/lzw120)
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- [viztor](https://github.com/viztor)
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- [wongzigii](https://github.com/wongzigii)
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- [umcsdon](https://github.com/umcsdon)
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- [zq54zquan](https://github.com/zq54zquan)
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- [xiehurricane](https://github.com/xiehurricane)
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- [Jasonbroker](https://github.com/Jasonbroker)
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- [tualatrix](https://github.com/tualatrix)
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- [pp-prog](https://github.com/pp-prog)
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- [088haizi](https://github.com/088haizi)
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- [baocaixiong](https://github.com/baocaixiong)
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- [yeahdongcn](https://github.com/yeahdongcn)
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- [shinyzhu](https://github.com/shinyzhu)
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- [lslxdx](https://github.com/lslxdx)
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- [Evilcome](https://github.com/Evilcome)
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- [zqp](https://github.com/zqp)
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- [NicePiao](https://github.com/NicePiao)
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- [LunaticM](https://github.com/LunaticM)
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- [menlongsheng](https://github.com/menlongsheng)
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- [lifedim](https://github.com/lifedim)
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- [happyming](https://github.com/happyming)
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- [bruce0505](https://github.com/bruce0505)
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- [Lin-H](https://github.com/Lin-H)
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- [takalard](https://github.com/takalard)
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- [ChildhoodAndy](https://github.com/ChildhoodAndy)
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- [marsprince](https://github.com/marsprince)
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@ -1,5 +1,5 @@
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> 翻译：zqp
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> 校对：shinyzhu
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> 校对：shinyzhu, stanzhai
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# 集合类型 (Collection Types)
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-----------------
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@ -123,14 +123,8 @@ shoppingList[4...6] = ["Bananas", "Apples"]
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// shoppingList 现在有六项
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```
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<<<<<<< HEAD
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> 注意：
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>我们不能使用下标语法在数组尾部添加新项。如果我们试着用这种方法对索引越界的数据进行检索或者设置新值的操作，我们会引发一个运行期错误。我们可以使用索引值和数组的`count`属性进行比较来在使用某个索引之前先检验是否有效。除了当`count`等于 0 时（说明这是个空数组），最大索引值一直是`count - 1`，因为数组都是零起索引。
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=======
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> 注意：
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>
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>我们不能使用下标语法在数组尾部添加新项。如果我们试着用这种方法对索引越界的数据进行检索或者设置新值的操作，我们会引发一个运行时错误。我们可以使用索引值和数组的`count`属性进行比较来在使用某个索引之前先检验是否有效。除了当`count`等于 0 时（说明这是个空数组），最大索引值一直是`count - 1`，因为数组都是零起索引。
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>>>>>>> a516af6a531a104ec88da0d236ecf389a5ec72af
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调用数组的`insert(atIndex:)`方法来在某个具体索引值之前添加数据项：
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@ -364,6 +358,7 @@ for (airportCode, airportName) in airports {
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// TYO: Tokyo
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// LHR: London Heathrow
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```
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`for-in`循环请参见[For 循环](05_Control_Flow.html#for_loops)。
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我们也可以通过访问它的`keys`或者`values`属性（都是可遍历集合）检索一个字典的键或者值：
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@ -374,9 +369,7 @@ for airportCode in airports.keys {
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}
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// Airport code: TYO
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// Airport code: LHR
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```
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```swift
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for airportName in airports.values {
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println("Airport name: \(airportName)")
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}
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@ -389,9 +382,7 @@ for airportName in airports.values {
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```swift
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let airportCodes = Array(airports.keys)
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// airportCodes is ["TYO", "LHR"]
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```
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```swift
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let airportNames = Array(airports.values)
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// airportNames is ["Tokyo", "London Heathrow"]
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```
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@ -435,4 +426,3 @@ Swift 数组的可变性行为同时影响了数组实例如何被分配和修
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> 注意：
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> 在我们不需要改变数组大小的时候创建不可变数组是很好的习惯。如此 Swift 编译器可以优化我们创建的集合。
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