The break statement inside a switch can be used when you don’t need a case to have any actual functionality, but want to include it to make your logic easier or clearer. Suppose for example you want to use a switch statement to determine if a given year is a leap year or not. (This … Read more
How would you expect fallthrough to work? In this type switch, the i variable has a type that depends on the particular case that’s invoked. So in the case bool the i variable is typed as bool. But in case string it’s typed as string. So either you’re asking for i to magically morph its … Read more
Let me put if to the club too. You use if with one condition and a possible else, that’s it. You use the cond statement when you have more than one condition and an if statement isn’t enough, by the end, the case statement is used when you want to pattern match some data. Let’s … Read more
Large case expressions will cause the optimizer to take a long time, as of 0.16. Here’s the discussion on Elm-Discuss bringing up the issue, and a gist of the nasty case match.
As with most things you should pick which to use based on the context and what is conceptually the correct way to go. A switch is really saying “pick one of these based on this variables value” but an if statement is just a series of boolean checks. As an example, if you were doing: … Read more
Yes. You can do so as follows: var testVal = “hello” var result = 0 switch testVal { case “one”, “two”: result = 1 default: result = 3 } Alternatively, you can use the fallthrough keyword: var testVal = “hello” var result = 0 switch testVal { case “one”: fallthrough case “two”: result = 1 … Read more