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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // | ||
| // Collection+Extension.swift | ||
| // momoIOS | ||
| // | ||
| // Created by 임수현 on 2023/02/11. | ||
| // | ||
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| import Foundation | ||
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| extension Collection { | ||
| subscript (safe index: Index) -> Element? { | ||
| return indices.contains(index) ? self[index] : nil | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| // | ||
| // String+Extension.swift | ||
| // momoIOS | ||
| // | ||
| // Created by 임수현 on 2023/02/11. | ||
| // | ||
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| import Foundation | ||
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| extension String { | ||
| subscript (safe index: Int) -> String? { | ||
| guard self.count > index else { return nil } | ||
| let index = self.index(self.startIndex, offsetBy: index) | ||
| return "\(self[index])" | ||
| } | ||
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| subscript (range: Range<Int>) -> String? { | ||
| let fromIndex = self.index(self.startIndex, offsetBy: max(0, range.lowerBound)) | ||
| let toIndex = self.index(self.startIndex, offsetBy: min(range.upperBound, self.count)) | ||
| return String(self[fromIndex..<toIndex]) | ||
| } | ||
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| subscript(_ range: Range<Int>) -> String { | ||
| let fromIndex = self.index(self.startIndex, offsetBy: range.startIndex) | ||
| let toIndex = self.index(self.startIndex, offsetBy: range.endIndex) | ||
| return String(self[fromIndex..<toIndex]) | ||
| } | ||
|
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| func replaced(_ string: String, in range: NSRange) -> String? { | ||
| guard let range = Range(range, in: self) else { return nil } | ||
| return self.replacingCharacters(in: range, with: string) | ||
| } | ||
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| var isBackspace: Bool { | ||
| if let char = self.cString(using: String.Encoding.utf8) { | ||
| return strcmp(char, "\\b") == -92 | ||
| } | ||
| return false | ||
| } | ||
| } |
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