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Discussion on: Juniors Literally Can't Write Switch Statements: What Senior PHP Developers Need to Focus On

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Replies for: Right, but only for simple things. To me, especially with an OO design, I'd rather encourage: // assume a calculator that only handles binary o...

 
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Wouter Doeland • • Edited

Sure, but in the Operator#resolve function you will still need either an if or a switch statement. How I would do this in Kotlin:

fun resolve(a: Int, b: Int) = when(type) { // type is the operator type
        OperatorType.minus -> a - b
        OperatorType.plus -> a + b
    }

or:

fun resolve(a: Int, b: Int) =
    if(type == OperatorType.minus)
        a - b
    else if(type == OperatorType.plus)
        a + b
    else
        throw Exception("!?")

I think the first one is way more clear.