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February 18, 2017 00:41
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配列の特定要素を抽出するのに for 文の代わりに if 文を使いましょう ref: http://qiita.com/lovee/items/1ae88d41b573b5d1012c
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| let list = ["Apple", "Boy", "Serval Cat"] | |
| func search(for target: String) { | |
| for item in list { | |
| if item.lowercased().hasSuffix(target.lowercased()) { | |
| print("We have a \(item)") | |
| return | |
| } | |
| } | |
| print("We don't have a \(target)") | |
| } | |
| search(for: "cat") // We have a Serval Cat |
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| let list = ["Apple", "Boy", "Serval Cat"] | |
| func search(for target: String) { | |
| if let target = list.first(where: {$0.lowercased().hasSuffix(target.lowercased())}) { | |
| print("We have a \(target)") | |
| } else { | |
| print("We don't have a \(target)") | |
| } | |
| } | |
| search(for: "cat") // We have a Serval Cat |
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| let list = ["Apple", "Boy", "Serval Cat"] | |
| func search(for target: String) { | |
| if let target = list.retrieve({$0.lowercased().hasSuffix(target.lowercased())}) { | |
| print("We have a \(target)") | |
| } else { | |
| print("We don't have a \(target)") | |
| } | |
| } | |
| search(for: "cat") // We have a Serval Cat |
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| let list = ["apple", "boy", "cat"] | |
| func search(for target: String) { | |
| if list.retrieve({$0 == target}) != nil { | |
| print("We have a \(target)") | |
| } else { | |
| print("We don't have a \(target)") | |
| } | |
| } | |
| search(for: "dog") // We don't have a dog |
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| let list = ["Apple", "Boy", "Serval Cat"] | |
| func search(for target: String) { | |
| if let target = list.filter({$0.lowercased().hasSuffix(target.lowercased())}).first { | |
| print("We have a \(target)") | |
| } else { | |
| print("We don't have a \(target)") | |
| } | |
| } | |
| search(for: "cat") // We have a Serval Cat |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| let list = ["Apple", "Boy", "Serval Cat"] | |
| func search(for target: String) { | |
| if let target = list.filter({$0.lowercased().hasSuffix(target.lowercased())}).first { | |
| print("We have a \(target)") | |
| } else { | |
| print("We don't have a \(target)") | |
| } | |
| } | |
| search(for: "cat") // We have a Serval Cat |
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