What is a fast way to convert a string of two characters to an array of booleans?

Question

I have a long string (sometimes over 1000 characters) that I want to convert to an array of boolean values. And it needs to do this many times, very quickly.

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Answer 1

Use withCString(_:) to retrieve a raw UnsafePointer. Iterate over that and compare to 49 (ascii value of "1").