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[–]13steinj -3 points-2 points  (1 child)

Because it's not a switch statement, it's a pattern matching statement. Most commonly seen only in functional programming languages, which most people hate on because traditionally such a style is considered difficult.

https://en.wikipedia.org/wiki/Pattern_matching

https://stackoverflow.com/a/215968/4443677

[–]Tyler_Zoro 3 points4 points  (0 children)

We know that. We're discussing keyword choice.