質問編集履歴
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追記
test
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File without changes
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test
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@@ -65,3 +65,63 @@
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65
65
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66
66
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67
67
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```
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68
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69
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70
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71
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### 解決方法＆備忘録
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72
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73
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74
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75
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76
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77
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その1
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78
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79
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```swift
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80
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81
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let array = ["A", "B", "B", "B", "C", "D", "D"]
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82
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83
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84
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85
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// 重複している要素の取得
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86
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87
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var set = Set<String>()
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88
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89
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let duplicatedEArray = NSOrderedSet(array: array.filter { !set.insert($0).inserted }).array as! [String]
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90
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91
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// => ["B", "D"]
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92
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93
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94
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95
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// ユニークな要素の取得
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96
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97
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let noDuplicatedArray = NSOrderedSet(array: array).array as! [String]
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98
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99
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let UniqueEArray = noDuplicatedArray.filter{ v in return !duplicatedEArray.contains(v) }
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100
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101
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// => ["A", "C"]
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102
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103
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```
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104
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105
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その2
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106
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107
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```swift
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108
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109
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let array = ["A", "B", "B", "B", "C", "D", "D"]
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110
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111
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112
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113
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// 重複している要素の取得
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114
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115
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let duplicatedEArray = Array(Dictionary(grouping: array) {$0}.filter {$0.value.count > 1}.keys)
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116
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117
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// => ["B", "D"]
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118
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119
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120
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121
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// ユニークな要素の取得
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122
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123
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let UniqueEArray = Array(Dictionary(grouping: array) {$0}.filter {$0.value.count == 1}.keys)
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124
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125
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// => ["A", "C"]
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126
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127
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```
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