naoto0n2 / Sorter

Sorter with multiple conditions in Swift, such as NSSortDescriptor.

Sorter

Sorter with multiple conditions in Swift, such as NSSortDescriptor.

let items: [Item] = ...

// Create Sorter for each attribute
let sorterForNum = Sorter<Item>(asc: false) { $0.num }
let sorterForText = Sorter<Item>(asc: true) { $0.text }

// Create Sorter with multiple conditions
let sorter = Sorter([sorterForNum, sorterForText])

// Get sorted result
let result = items.sorted(by: sorter)

/*
result: [
    Item(num: 2, text: "a"),
    Item(num: 2, text: "b"),
    Item(num: 2, text: "c"),
    Item(num: 1, text: "a"),
    Item(num: 1, text: "b"),
    Item(num: 1, text: "c")
]
*/

Initializer

1. Initialize Sorter by comparable attribute

Default order is ascending.

Sorter<Item>(asc: false) { $0.num } // Pattern 1
Sorter<Item>(asc: true) { $0.num } // Pattern 2
Sorter<Item> { $0.num } // Pattern 3

2. Initialize Sorter by descriptor

Sorter<Item> { $0.0.text < $0.1.text }

3. Initialize Sorter by multiple conditions

Sorter([sorter1, sorter2])
Sorter([sorter1, sorter2, sorter3])
...

Sort sequence

Sort items by sorter

let result = items.sort(by: sorter)

Requirements

• Swift 3.0 or later
• iOS 8.0 or later

Installation

CocoaPods

• Insert pod 'Sorter' to your Podfile.
• Run pod install.

Note: CocoaPods 1.1.0 is required to install Sorter.

Author

Naoto Onagi, [e-mail]

License

Sorter is available under the MIT license. See the LICENSE file for more info.