11.集合类型-数组

/**
 * 描述:集合类型 Collection 同类型的值的组合, 根据整体特性分:
 *    1.有序可重复 - Array, 索引从0开始(index, i)
 *    2.无序不重复 - Set
 *    3.无序可重复 - Map, 但值有唯一的键(Key)
 * 作者：jet
 * 创建时间： 2017-11-20 11:31
 * 修改人：
 * 修改时间：
 * 修改内容：
 */
fun main(args: Array<String>) {
    //Array(数组创建方式) Array<类型> 或arrayOf(元素1，元素2，...元素n)
    //大小固定，元素类型不可变
    // 地铁1号线: "罗湖站","国贸站","老街站","大剧院站","科学馆站", "华强路站","岗厦站", "会展中心站","购物公园站"
    //  "香蜜湖站、","车公庙站","竹子林站","侨城东站","华侨城站", "世界之窗站","白石洲站", "高新园站","深大站", "桃园站","大新站"
    //  "鲤鱼门站","前海湾站","新安站","宝安中心站","宝体站", "坪洲站","西乡站", "固戍站","后瑞站","机场东站"
    var line1Stations = arrayOf("罗湖站","国贸站","罗湖站","国贸站","老街站","大剧院站","科学馆站", "华强路站","岗厦站", "会展中心站","购物公园站")

    //创建一个默认有值得数组，Array(计数，{默认值})
   var line1StationPlaceholders = Array(20,{"临时站名"})
    for (line1StationPlaceholder in line1StationPlaceholders) {
        print(line1StationPlaceholder+" ")
    }



    //创建1到10数组 Array(10,{i->i+1})
    //i代表元素的索引，从0开始
    var oneToTen= Array(10,{i->i+1})
    for (i in oneToTen) {
        print(i.toString()+" ")
    }

    //元素计数：count() ,空否：isEmpty()
    print(oneToTen.count())
    print(oneToTen.isEmpty())

    //获取其中元素：数组名[索引]，首元素：数组名.first 尾元素：数组名.last
    //获取前5个元素的快捷方法 .component1到5
    println("${oneToTen.component1()},${oneToTen.component2()}")
    println(oneToTen[10-1])
    println(oneToTen.last())

    //获取筛选重复元素后的数组：.distinct()或用.toSet()转换为Set（因为Set类型的集合是不重复的）
    var line1StationNoRepeat = line1Stations.toSet()
    for (s in line1StationNoRepeat) {
        print(s+" ")
    }
    //分割数组:sliceArray
    println()
    val line1StationInAirport = line1Stations.sliceArray(4..6)
    for (s in line1StationInAirport) {
        print(s+" ")
        println()
    }

    //mutableList :MutableList<类型>或mutableListOf(元素1, 元素2, ...,元素n)
    //大小可变，类型不可变
    // 地铁1号线: "罗湖站","国贸站","老街站","大剧院站","科学馆站", "华强路站","岗厦站", "会展中心站","购物公园站"
    //  "香蜜湖站、","车公庙站","竹子林站","侨城东站","华侨城站", "世界之窗站","白石洲站", "高新园站","深大站", "桃园站","大新站"
    //  "鲤鱼门站","前海湾站","新安站","宝安中心站","宝体站", "坪洲站","西乡站", "固戍站","后瑞站","机场东站"
   var line1Station2 = mutableListOf("罗湖站","国贸站","老街站","大剧院站","科学馆站", "华强路站","岗厦站", "会展中心站","购物公园站")

    val newStation = arrayOf("香蜜湖站、","车公庙站","竹子林站","侨城东站","华侨城站", "世界之窗站","白石洲站", "高新园站","深大站", "桃园站","大新站")

    //在末尾增加元素:add方法. 添加另一个数组addAll方法
    line1Station2.addAll(newStation)
    line1Station2.add("鲤鱼门站")
    println()
    for (s in line1Station2) {
        print(s+" ")
    }

    //移出元素remove,移出指定位置removeAt,移除部分数据removeAll
    line1Station2.removeAll(newStation)
}

出自：http://www.xiaoboswift.com/course/54