Created
June 11, 2014 11:26
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SwiftのArrayとDictionaryの使い方 ref: http://qiita.com/hachinobu/items/d591d0cba23b6dfec559
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| // immutableなString型の配列 | |
| let names: String[] = ["name5", "name2", "name1", "name3"] | |
| //各データを取得 | |
| let name1 = names[0] //name5 | |
| let name2 = names[1] //name2 | |
| let name3 = names[2] //name1 | |
| let name4 = names[3] //name3 | |
| //各件数 | |
| names.capacity // 4 | |
| names.startIndex // 0 | |
| names.endIndex // 4 | |
| names.count // 4 | |
| // mutableなString型の配列 | |
| var programLang = ["Objective-C", "Java"] | |
| // データ追加 | |
| programLang.append("Swift") // [Objective-C, Java, Swift] | |
| programLang += "Python" // [Objective-C, Java, Swift, Python] | |
| let addLang = ["Ruby", "PHP"] | |
| programLang.extend(addLang) // [Objective-C, Java, Swift, Python, Ruby, PHP] | |
| programLang += ["Scala", "JavaScript"] // [Objective-C, Java, Swift, Python, Ruby, PHP, Scala, JavaScript] | |
| programLang.insert("ひまわり", atIndex: 0) // [ひまわり, Objective-C, Java, Swift, Python, Ruby, PHP, Scala, JavaScript] | |
| // 配列の中身を逆順にする | |
| programLang.reverse() // [ひまわり, Objective-C, Java, Swift, Python, Ruby, PHP, Scala, JavaScript] | |
| // 配列内をソート(降順) | |
| sort(programLang) { $0 > $1 } // [ひまわり, Swift, Scala, Ruby, Python, PHP, Objective-C, JavaScript, Java] | |
| // 配列内をソート(昇順) | |
| sort(programLang) { $0 < $1 } // [Java, JavaScript, Objective-C, PHP, Python, Ruby, Scala, Swift, ひまわり] | |
| // programLang配列のインデックスが0,1,2のデータを取得 | |
| programLang[0...2] // [Java, JavaScript, Objective-C] | |
| // programLang配列のインデックスが0,1のデータをCとC#にする | |
| programLang[0...1] = ["C", "C#"] // [C, C#, Objective-C, PHP, Python, Ruby, Scala, Swift, ひまわり] | |
| // 先頭にCがつく言語を取得 | |
| programLang.filter { $0.hasPrefix("C") } // [C, C#] | |
| // 各言語データの先頭に Language: を付与 | |
| programLang.map { "Language: \($0)" } // [Language: C, Language: C#, Language: Objective-C, Language: PHP, Language: Python, Language: Ruby, Language: Scala, Language: Swift, Language: ひまわり] | |
| // 指定インデックスに該当するデータ削除 | |
| programLang.removeAtIndex(0) // [C#, Objective-C, PHP, Python, Ruby, Scala, Swift, ひまわり] | |
| // インデックス0,1,2のデータを削除 | |
| programLang[0...2] = [] // [Python, Ruby, Scala, Swift, ひまわり] | |
| // 配列の最後に格納されているデータを削除 | |
| programLang.removeLast() // [Python, Ruby, Scala, Swift] | |
| // 全て削除 | |
| programLang.removeAll() // [] | |
| // copyとunshare | |
| // mutableな配列 | |
| var numbersA: Int[] = [1, 2, 3] | |
| var numbersB: Int[] = numbersA | |
| var numbersC: Int[] = numbersA.copy() // numbersAをcopy | |
| numbersA[0] = 0 | |
| println(numbersA) // [0, 2, 3] | |
| println(numbersB) // [0, 2, 3] | |
| println(numbersC) // [1, 2, 3] | |
| // copyしたnumbersBをunshare() | |
| numbersB.unshare() | |
| numbersA[1] = 5 | |
| numbersC[0...1] = [6, 7] | |
| println(numbersA) // [0, 5, 3] | |
| println(numbersB) // [0, 2, 3] unshareしたので参照データでなくなった | |
| println(numbersC) // [6, 7, 3] | |
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| // immutableなString型の配列 | |
| let names: String[] = ["name5", "name2", "name1", "name3"] | |
| //各データを取得 | |
| let name1 = names[0] //name5 | |
| let name2 = names[1] //name2 | |
| let name3 = names[2] //name1 | |
| let name4 = names[3] //name3 | |
| //各件数 | |
| names.capacity // 4 | |
| names.startIndex // 0 | |
| names.endIndex // 4 | |
| names.count // 4 | |
| // mutableなString型の配列 | |
| var programLang = ["Objective-C", "Java"] | |
| // データ追加 | |
| programLang.append("Swift") // [Objective-C, Java, Swift] | |
| programLang += "Python" // [Objective-C, Java, Swift, Python] | |
| let addLang = ["Ruby", "PHP"] | |
| programLang.extend(addLang) // [Objective-C, Java, Swift, Python, Ruby, PHP] | |
| programLang += ["Scala", "JavaScript"] // [Objective-C, Java, Swift, Python, Ruby, PHP, Scala, JavaScript] | |
| programLang.insert("ひまわり", atIndex: 0) // [ひまわり, Objective-C, Java, Swift, Python, Ruby, PHP, Scala, JavaScript] | |
| // 配列の中身を逆順にする | |
| programLang.reverse() // [ひまわり, Objective-C, Java, Swift, Python, Ruby, PHP, Scala, JavaScript] | |
| // 配列内をソート(降順) | |
| sort(programLang) { $0 > $1 } // [ひまわり, Swift, Scala, Ruby, Python, PHP, Objective-C, JavaScript, Java] | |
| // 配列内をソート(昇順) | |
| sort(programLang) { $0 < $1 } // [Java, JavaScript, Objective-C, PHP, Python, Ruby, Scala, Swift, ひまわり] | |
| // programLang配列のインデックスが0,1,2のデータを取得 | |
| programLang[0...2] // [Java, JavaScript, Objective-C] | |
| // programLang配列のインデックスが0,1のデータをCとC#にする | |
| programLang[0...1] = ["C", "C#"] // [C, C#, Objective-C, PHP, Python, Ruby, Scala, Swift, ひまわり] | |
| // 先頭にCがつく言語を取得 | |
| programLang.filter { $0.hasPrefix("C") } // [C, C#] | |
| // 各言語データの先頭に Language: を付与 | |
| programLang.map { "Language: \($0)" } // [Language: C, Language: C#, Language: Objective-C, Language: PHP, Language: Python, Language: Ruby, Language: Scala, Language: Swift, Language: ひまわり] | |
| // 指定インデックスに該当するデータ削除 | |
| programLang.removeAtIndex(0) // [C#, Objective-C, PHP, Python, Ruby, Scala, Swift, ひまわり] | |
| // インデックス0,1,2のデータを削除 | |
| programLang[0...2] = [] // [Python, Ruby, Scala, Swift, ひまわり] | |
| // 配列の最後に格納されているデータを削除 | |
| programLang.removeLast() // [Python, Ruby, Scala, Swift] | |
| // 全て削除 | |
| programLang.removeAll() // [] | |
| // copyとunshare | |
| // mutableな配列 | |
| var numbersA: Int[] = [1, 2, 3] | |
| var numbersB: Int[] = numbersA | |
| var numbersC: Int[] = numbersA.copy() // numbersAをcopy | |
| numbersA[0] = 0 | |
| println(numbersA) // [0, 2, 3] | |
| println(numbersB) // [0, 2, 3] | |
| println(numbersC) // [1, 2, 3] | |
| // copyしたnumbersBをunshare() | |
| numbersB.unshare() | |
| numbersA[1] = 5 | |
| numbersC[0...1] = [6, 7] | |
| println(numbersA) // [0, 5, 3] | |
| println(numbersB) // [0, 2, 3] unshareしたので参照データでなくなった | |
| println(numbersC) // [6, 7, 3] | |
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| // 初期化 | |
| var personInfo: Dictionary = ["name": "hachinobu", "age": 28] | |
| // データ追加 | |
| personInfo["sex"] = "man" | |
| // データ取得 | |
| personInfo["name"] // hachinobu | |
| personInfo["age"] // 28 | |
| personInfo["sex"] // man | |
| // 格納件数 | |
| personInfo.count // 3 | |
| // keyの配列を取得 | |
| let keys: Array = Array(personInfo.keys) // [sex, name, age] | |
| // valueの配列を取得 | |
| let values: Array = Array(personInfo.values) // [man, hachinobu, 28] | |
| // Dictionaryにnameというkeyでデータが格納されているかチェック、なければ追加する | |
| if let name = personInfo["name"] { | |
| println("name is \(name)") // name is hachinobu | |
| } else { | |
| personInfo["name"] = "hachinobu" | |
| } | |
| // データ更新 | |
| personInfo.updateValue("nishinobu", forKey: "name") // [sex: man, name: nishinobu, age: 28] | |
| // 既に存在するkeyならupdateで存在しないkeyであればinsertになる | |
| if let age = personInfo.updateValue(29, forKey: "age") { | |
| println("update") | |
| } else { | |
| println("insert") | |
| } | |
| // 追加 | |
| personInfo["height"] = 171 // [age: 29, sex: man, name: nishinobu, height: 171] | |
| // 指定したkeyのデータを削除 | |
| personInfo.removeValueForKey("height") // [age: 29, sex: man, name: nishinobu] | |
| // personInfoのようにvalueの型がOptionalでない場合はvalueにnilを入れると削除扱い | |
| personInfo["name"] = nil // [age: 29, sex: man] | |
| // 下記のようにvalueの型がOptionalの場合にvalueにnilを入れるとnilが代入される | |
| var optionalDict: Dictionary<String, NSObject?> = ["key1": "A", "key2": "B"] | |
| optionalDict["key1"] = nil // [key2: B, key1: nil] |
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| // 初期化 | |
| var personInfo: Dictionary = ["name": "hachinobu", "age": 28] | |
| // データ追加 | |
| personInfo["sex"] = "man" | |
| // データ取得 | |
| personInfo["name"] // hachinobu | |
| personInfo["age"] // 28 | |
| personInfo["sex"] // man | |
| // 格納件数 | |
| personInfo.count // 3 | |
| // keyの配列を取得 | |
| let keys: Array = Array(personInfo.keys) // [sex, name, age] | |
| // valueの配列を取得 | |
| let values: Array = Array(personInfo.values) // [man, hachinobu, 28] | |
| // Dictionaryにnameというkeyでデータが格納されているかチェック、なければ追加する | |
| if let name = personInfo["name"] { | |
| println("name is \(name)") // name is hachinobu | |
| } else { | |
| personInfo["name"] = "hachinobu" | |
| } | |
| // データ更新 | |
| personInfo.updateValue("nishinobu", forKey: "name") // [sex: man, name: nishinobu, age: 28] | |
| // 既に存在するkeyならupdateで存在しないkeyであればinsertになる | |
| if let age = personInfo.updateValue(29, forKey: "age") { | |
| println("update") | |
| } else { | |
| println("insert") | |
| } | |
| // 追加 | |
| personInfo["height"] = 171 // [age: 29, sex: man, name: nishinobu, height: 171] | |
| // 指定したkeyのデータを削除 | |
| personInfo.removeValueForKey("height") // [age: 29, sex: man, name: nishinobu] | |
| // valueにnilを入れると削除扱い | |
| personInfo["name"] = nil // [age: 29, sex: man] | |
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