回答編集履歴
1
Set
test
CHANGED
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@@ -7,3 +7,37 @@
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}
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```
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##### Setを使う
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```swift
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var identifiers = [String:Set<String>]()
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func addIdentifiers(identifier: String, coordinatesCount: String) {
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if var coordinates = identifiers[identifier] {
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//keyあり
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coordinates.insert(coordinatesCount)
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} else {
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//keyなし
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identifiers[identifier] = [coordinatesCount]
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}
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}
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```
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