First Pull Request

Add more Optional extensions SwifterSwift/SwifterSwift

```swift // check if optional is nil or empty string public extension Optional where Wrapped == String { public var isNilOrEmpty: Bool { ... } } // check if optional is nil or empty coll...

Created - 1 comment - good first issue new extension

Add an extension to create a MD5 hash from a string SwifterSwift/SwifterSwift

[ ] I've read, understood, and done my best to follow the [Contributing guidelines]( before opening this issue. ### Wha...

Created - 4 comments - good first issue help wanted new extension

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