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Whitacre - Glow - Optional String Parts sheet music (complete collection) for orchestra/band (Strings)
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O Come, O Come Emmanuel (optional String Parts) By - Part Sheet Music For Set Of String Parts: (4.4.3.2.2.) - Buy Print Music AG.4008S | Sheet Music Plus
Vincent Pradeilles on Twitter: "Optional strings are very common in Swift. A classic requirement is to manipulate them as unwrapped strings, with a default value set to the empty string. Through a
GitHub - RyanFromQA/string-optional: A simple utility mimicking Java's Optional but tailored for Strings
![Providing default values for optional String and empty optional String in Swift 3.1 - Jan Thielemann Providing default values for optional String and empty optional String in Swift 3.1 - Jan Thielemann](https://janthielemann.de/wp-content/uploads/2017/05/optional-string-default-value-why.png)