回答編集履歴
2
勘違いしてたので元に戻した
answer
CHANGED
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@@ -1,23 +1,3 @@
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1
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```swift
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2
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let csvStr = arrayOfArray.map { $0.map { "\"" + $0 + "\"" }.joined(separator: ",") }.joined(separator: "\n")
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3
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-
```
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-
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----
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追加
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7
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バラバラに見てみましょう。
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8
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まず、配列の中の配列部分。
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```swift
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let innerArray = ["xxx","AAA","1,000","2,000"]
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innerArray
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.map { "\"" + $0 + "\"" } // -> ["\"xxx\"","\"AAA\"","\"1,000\"","\"2,000\""] 各要素を"で囲む
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.joined(separator: ",") // -> "xxx","AAA","1,000","2,000" 各要素を,で連結
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```
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15
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一つの配列内の配列が、CVS1行分に変換されます。
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-
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次に外側。
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```swift
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-
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let convertedArray = ["\"\"xxx\",\"AAA\",\"1,000\",\"2,000\"\"", "\"YYY\",\"BBB\",\"1,100\",\"2,000\"", "\"ZZZ\",\"CCC\",\"2,000\",\"3,000\""]
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convertedArray
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.joined(separator: "\n") // 各要素を改行で連結
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3
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```
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1
追加
answer
CHANGED
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@@ -1,3 +1,23 @@
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1
1
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```swift
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2
2
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let csvStr = arrayOfArray.map { $0.map { "\"" + $0 + "\"" }.joined(separator: ",") }.joined(separator: "\n")
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3
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+
```
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4
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+
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5
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+
----
|
|
6
|
+
追加
|
|
7
|
+
バラバラに見てみましょう。
|
|
8
|
+
まず、配列の中の配列部分。
|
|
9
|
+
```swift
|
|
10
|
+
let innerArray = ["xxx","AAA","1,000","2,000"]
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11
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+
innerArray
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12
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+
.map { "\"" + $0 + "\"" } // -> ["\"xxx\"","\"AAA\"","\"1,000\"","\"2,000\""] 各要素を"で囲む
|
|
13
|
+
.joined(separator: ",") // -> "xxx","AAA","1,000","2,000" 各要素を,で連結
|
|
14
|
+
```
|
|
15
|
+
一つの配列内の配列が、CVS1行分に変換されます。
|
|
16
|
+
|
|
17
|
+
次に外側。
|
|
18
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+
```swift
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19
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+
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20
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+
let convertedArray = ["\"\"xxx\",\"AAA\",\"1,000\",\"2,000\"\"", "\"YYY\",\"BBB\",\"1,100\",\"2,000\"", "\"ZZZ\",\"CCC\",\"2,000\",\"3,000\""]
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21
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convertedArray
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22
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.joined(separator: "\n") // 各要素を改行で連結
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3
23
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```
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