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I think that there are missing comas in code, so it does not compile :/
I just fixed it !
a small typo:> In Kotlin, IF becomes an expression, that means that it cans return values
Just a small typo: the withIndex() example seems to be backwards, for me it prints "animal at dog is 0" etc when I expected it to be the other way around (animal at 0 is dog). Otherwise it's nice to see an overview of Kotlin like this :)