玩儿转Swift _技术笔记

CoderDream 2018-07-02

//: Playground - noun: a place where people can play

import UIKit

var array = ["AA", "BB", "CC", "D", "E", "F"]

array.count
array.isEmpty

array.append("G")
array += ["H"]
array += ["I", "J", "K"]

array.insert("Hello", atIndex: 0)
array

array.removeAtIndex(0)
array

array.removeLast()
array

array.removeRange(Range<Int>(0..<3))
array

array[0] = "AA"
array

array[2...4] = ["CC", "DD", "EE"]
array

for index in 0..<array.count {
print(array[index])
}

for item in array {
print(item)
}

for (index, item) in array.enumerate() {
print("\(index) - \(item)")
}

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措言 2017-06-07

import UIKit var array = ["A", "B", "C", "D"]; array.count array.isEmpty array.append("G") array+=["H"] array.insert("hello", atIndex:0) array array.removeAtIndex(0) array.removeLast array[0] array[0]="AA" array[2...4] = ["CC", "DD", "EE"] array array[2...4]= ["Hello"] array for index in 0..array.count{ println(array[index]) } for item in array{ println(item) } for(index, item) in enumerate(array){ println("\(index) - \(item)") }

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CrazyCodes 2016-03-28

这地方相当于是PHP中的FOREACH foreach($array as $key=>$val){ echo $key.'-'.$val; }

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慕仙3488553 2016-03-09

var arry = ["A","B","C","D"]<br> arry.apend("E")//将E插入数组的末尾<br> arry.Insert("hello",atendex:0) //将hello插入索引0的位置 arry.removeAtIndex(0) //删除索引0位置的数 arry.removeLast() //删除数组arry的最后一位数数组的删除，插入操作不能越界修改数组中的元素：arry[0] = "AA" //将索引0位置的元素修改为AA 批量修改数组中的元素：arry[2...4] = ["CC","DD","EE"] arry[2...4] = ["CC"] //可以不用全写索引值也不能越界 //即可以获得索引的值也可以获得索引 for (index,item) in enumerate(arry){ println("\(index),\(item)") }

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qq_不想再停留飞_0 2016-01-05

252

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大浓妆掩饰小悲伤 2016-01-03

1. .count 2. .isEmpty 3. .append 4. += array 5. .insert("xxx",atIndex:2) 6. .ramoveAtIndex 7. .removeLast 8. .removeAll 9. .removeRange 10. array[2...4] = ["cc","d","e"] 区间替换数组数据，数量可以不匹配知识点1：遍历数组 1. for item in array{} 2. for index in 0..<array.count{} 3. for (index,item) in enumerate(array){}

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qq_君君_0 2015-10-17

var arr:[Int] = []; arr.append(0); arr[0] = 1; arr.append(222); arr.count; arr.isEmpty; arr += [3,5,6] arr.insert(9, atIndex: 2); arr.removeAtIndex(2); arr arr.removeLast(); arr arr.removeRange(1...2); Range<Int>(start: 0, end: 2) == 0..<2

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胖鸟 2015-10-03

5-2 数组的基本操作 1. .count 2. .isEmpty 3. .append 4. += array 5. .insert("xxx",atIndex:2) 6. .ramoveAtIndex 7. .removeLast 8. .removeAll 9. .removeRange 10. array[2...4] = ["cc","d","e"] 区间替换数组数据，数量可以不匹配知识点1：遍历数组 1. for item in array{} 2. for index in 0..<array.count{} 3. for (index,item) in enumerate(array){}

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cosmochina 2015-07-24

数组的遍历 for (索引,值) in enumerate(数组) { ····· }

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永远的零 2015-06-27

array.insert("string", atIndex: 0) removeAtIndex removeLast removeAll removeRange for (index, item) in enumerate(array){ //遍历 }

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ylsunmoon 2015-06-17

数组的遍历 for (索引,值) in enumerate(数组) { ····· }

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ylsunmoon 2015-06-17

当使用数组区间赋值时，对应的值必须为数组（数组可以不等）例如： var array:[string]=["A","B","C"] array[1...2]=["b","c"] array的结果为：["A","b","c"] array[1...2]=["b"] array的结果为：["A","b"]

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John_Pan 2015-06-14

for index in 0..<arr8.count { println("the \(index) element is " + arr8[index]) } for item in arr8 { println(item) //不能取出索引值 } for (index,item) in enumerate(arr8) { println("\(index) - \(item)") }

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beyonder1980 2015-06-08

同时可以取到索引和内容： for(index,item) in enumerate(array){}

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beyonder1980 2015-06-08

局部替换数组：array[2...4]=["cc"]将位置2的元素替换为cc

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beyonder1980 2015-06-08

局部替换数组：array[2..4]=["cc","dd","ee"]

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Hux 2015-05-25

for item in array{ println(item) } for (index, item) in enumerate(array){ println("\(index) - \(item)") }

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Hux 2015-05-25

var array = [1,2,3,4,5,6,7] let range = advance(array.startIndex, 2)..<advance(array.startIndex, 4) array.removeRange(range)

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Shuai0001 2015-05-18

遍历数组

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default_null 2015-05-06

for XXX in 进阶获取数据索引(下标)和内容 for (index,item) in enumerate(array) { println("\(index)-\(item)") }

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不辩是非 2015-04-21

数组的遍历：既能取得数组的索引也能取得数组的值 let arr = ["aa","bb","cc","dd","ee"] for (index, item) in enumerate(arr) { println("\(index): \(item)") }

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慕后端8796626 2015-04-18

1. for index in 0..array.count{ array[index]} 2. for item in array{ item } 3. for (index,item) in enumerate(array){ \(index), \(item)}

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慕后端8796626 2015-04-17

array.count .isEmpty .append(e) += .insert(T, atIndex:i) .removeAtIndex(i) .removeLast() .removeRange(a, b); array[i] = a array[2...4]=["AA","DD","EE"]

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慕妹5782114 2015-03-27

array.count array.isEmpty array.append() array.insert() for (index,item) in enumerate(array) { println("\(index)") } array.removeAtIndex(() array.removeLast()

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Eathon 2015-03-26

for （index, item） in enumerate(array) { println("\(index) - \(item)")

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waple_0820 2015-03-25

array.count 数组中的个数 array.isEmpty 是否为空 array.append("G") 添加G字符 array += ..添加某些元素 array.insert("str",atIndex:2) 在2位置插入“str” array.removeAtIndex("str") 删除“str” array.removeLast() 删除最后一个元素 array[2...4] = ["cc","ss","dd"] 批量修改元素可以少于区间但是要是一个子数组

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KyrieJobs 2015-03-14

var array = ["A","B","C"] var array1:[String] = ["A","B","C"] var array2:Array<String> = ["A","B","C"] //第一种隐式地声明，后两种显式地声明 array[0] = "D" array //修改数组中的数据 var array3 = [Int]() var array4 = Array<String>() var array5:[Int] = [] array5.append(2) array5 //写一个空数组并给它赋值 array = [] array.append("a") array //清空数组的值并重新赋值。注意：清空数组但不会改变数组可以存储的类型 array4 = [String](count: 5, repeatedValue: "A") //将一个数组的值赋成几个一样的值 array3.append(1) var array6:Array<Int> = [2,3,4,5] var array7 = array3 + array6 //加(合并)一个数组

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daqiuqu 2015-02-28

array.count array.isEmpty array.append array += ["", ""] array.insert("", atIndex: int) array.removeAtIndex(index: int) 返回所删除元素 array.removeLast() array.removeAll() array.removeRange(Range<Int>(Int, Int)) array[Index] = "" array[Index...Index] = ["", "", ""...] for index in 0..<array.count for item in array for (index, item) in enumerate(array)

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慕神2778055 2015-02-26

for (index,item) in enumerate(array2) { println("\(index),\(item)") }

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慕神2778055 2015-02-26

array[2...4]="orz"

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