Last Where

Prefer using .last(where:) over .filter { }.last in collections

• Identifier: last_where
• Enabled by default: No
• Supports autocorrection: No
• Kind: performance
• Analyzer rule: No
• Minimum Swift compiler version: 5.0.0
• Default configuration:

  Key	Value
  severity	warning

Non Triggering Examples

kinds.filter(excludingKinds.contains).isEmpty && kinds.last == .identifier

myList.last(where: { $0 % 2 == 0 })

match(pattern: pattern).filter { $0.last == .identifier }

(myList.filter { $0 == 1 }.suffix(2)).last

collection.filter("stringCol = '3'").last

Triggering Examples

↓myList.filter { $0 % 2 == 0 }.last

↓myList.filter({ $0 % 2 == 0 }).last

↓myList.map { $0 + 1 }.filter({ $0 % 2 == 0 }).last

↓myList.map { $0 + 1 }.filter({ $0 % 2 == 0 }).last?.something()

↓myList.filter(someFunction).last

↓myList.filter({ $0 % 2 == 0 })
.last

(↓myList.filter { $0 == 1 }).last