discouraged_optional_collection.md

Pattern: Use of optional collection instead of empty collection

Issue: -

Description

Prefer empty collection over optional collection.

Examples of correct code:

var foo: [Int]


var foo: [String: Int]


var foo: Set<String>


var foo: [String: [String: Int]]


let foo: [Int] = []

Examples of incorrect code:

↓var foo: [Int]?


↓var foo: [String: Int]?


↓var foo: Set<String>?


↓let foo: [Int]? = nil


↓let foo: [String: Int]? = nil

Further Reading

• SwiftLint - Discouraged Optional Collection