EFSafeArray is an extension to make array subscript safe, nil will be return instead of crash if index is out of range, it works on iOS, macOS, watchOS and tvOS.
To run the example project, clone the repo, and run pod install from the Example directory first.
- Xcode 16+
- Swift 6.0+
EFSafeArray is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'EFSafeArray'The Swift Package Manager is a tool for automating the distribution of Swift code and is integrated into the Swift compiler.
Once you have your Swift package set up, adding EFSafeArray as a dependency is as easy as adding it to the dependencies value of your Package.swift.
dependencies: [
.package(url: "https://github.com/EFPrefix/EFSafeArray.git", .upToNextMinor(from: "6.0.0.0"))
]var list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
// Get Index
let xxx = list[0] // xxx: Int = 1
let zzz = list[0~] // zzz: Int? = 1
let yyy = list[10~] // yyy: Int? = nil
// Set Index
list[0] = 0 // list = [0, 2, 3, 4, 5, 6, 7, 8, 9, 0]
list[0~] = 1 // list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
list[10~] = 10 // list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
// Get Bounds
let iiii = list[(0...5)~] // iiii: ArraySlice<Int>? = [1, 2, 3, 4, 5, 6]
let oooo = list[(-1...12)~] // oooo: ArraySlice<Int>? = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
// Set Bounds
list[(0...5)~] = [1] // list = [1, 7, 8, 9, 0]
list[(-1...12)~] = [2, 3, 4, 5] // list = [2, 3, 4, 5]EyreFree, eyrefree@eyrefree.org
EFSafeArray is available under the MIT license. See the LICENSE file for more info.