Recent questions tagged optional

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optional - Swift variable decorations with "?" (question mark) and "!" (exclamation mark)

I understand that in Swift all variables must be set with a value, and that by using optionals we can set a ... : CAShapeLayer! And why/when would I do this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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optional - What does an exclamation mark mean in the Swift language?

The Swift Programming Language guide has the following example: class Person { let name: String init(name: String) { ... answers below, made a lot more sense. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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optional parameters - Are Options and named default arguments like oil and water in a Scala API?

I'm working on a Scala API (for Twilio, by the way) where operations have a pretty large amount of parameters and ... and-named-default-arguments-like-oil-and-water-in-a-scala-api...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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optional parameters - Are Options and named default arguments like oil and water in a Scala API?

I'm working on a Scala API (for Twilio, by the way) where operations have a pretty large amount of parameters and ... and-named-default-arguments-like-oil-and-water-in-a-scala-api...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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