Add String extensions.

Author: Matthew Judy

Sources/Shared/String+.swift

@@ -0,0 +1,64 @@
+//
+//  String+.swift
+//
+//  Created by Matthew Judy on 12/4/23.
+//
+
+import Foundation
+
+
+extension StringProtocol
+{
+    public func ranges<T: StringProtocol>(of string: T, options: String.CompareOptions = [], range searchRange: Range<Self.Index>? = nil, locale: Locale? = nil) -> [Range<Self.Index>]
+    {
+        var ranges     = Array<Range<Index>>()
+        var startIndex = searchRange?.lowerBound ?? self.startIndex
+        let endIndex   = searchRange?.upperBound ?? self.index(before:self.endIndex)
+
+        while (startIndex < endIndex),
+              let range = self[startIndex...endIndex].range(of: string, options: options, locale: locale)
+        {
+            ranges.append(range)
+            startIndex = if (range.lowerBound < range.upperBound) { range.upperBound }
+                else { index(range.lowerBound, offsetBy: 1, limitedBy: endIndex) ?? endIndex }
+        }
+
+        return ranges
+    }
+
+
+    public func indices<T: StringProtocol>(of string: T, options: String.CompareOptions = [], range searchRange: Range<Self.Index>? = nil, locale: Locale? = nil) -> [Self.Index]
+    {
+        self.ranges(of: string, options: options, range: searchRange, locale: locale).map(\.lowerBound)
+    }
+
+
+    public func index<T: StringProtocol>(of string: T, options: String.CompareOptions = [], range searchRange: Range<Self.Index>? = nil, locale: Locale? = nil) -> Index?
+    {
+        self.range(of: string, options: options, range: searchRange, locale: locale)?.lowerBound
+    }
+
+
+    public func endIndex<T: StringProtocol>(of string: T, options: String.CompareOptions = [], range searchRange: Range<Self.Index>? = nil, locale: Locale? = nil) -> Index?
+    {
+        self.range(of: string, options: options, range: searchRange, locale: locale)?.upperBound
+    }
+}
+
+
+
+extension String
+{
+    public var integers: [Int]
+    {
+        self.compactMap { Int(String($0)) }
+    }
+
+
+    public func applying(replacements: [(searchString: String, replacement: String)]) -> String
+    {
+        replacements.reduce(self) { $0.replacingOccurrences(of: $1.0, with: $1.1) }
+    }
+}
+
+