Question

173

coffee script switch without break

rated 0 times [ 179] [ 6] / answers: 1 / hits: 24097 / 12 Years ago, tue, may 8, 2012, 12:00:00

Is it possible to use switch in coffeescript without break?

switch code                      switch (code) {

    when 37 then                     case 37: break;

    when 38 then           ->        case 38: break;

    when 39 then                     case 39: break;

    when 40                          case 40:

        ...                              ...

I thought this will work but failed:

switch code

    when 37 then continue

    when 38 then continue  ->    not valid

    when 39 then continue

    when 40

        ...

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anjelicadixied

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4 Years ago

answered 12 Years ago kylanalis · Accepted Answer

Not really. From the docs:

Switch statements in JavaScript are a bit awkward. You need to remember to break at the end of every case statement to avoid accidentally falling through to the default case. CoffeeScript prevents accidental fall-through, and can convert the switch into a returnable, assignable expression. The format is: switch condition, when clauses, else the default case.

What you can do, though, is specify several values in a case, if they are to be treated equally:

switch day

  when Mon then go work

  when Tue then go relax

  when Thu then go iceFishing

  when Fri, Sat

    if day is bingoDay

      go bingo

      go dancing

  when Sun then go church

  else go work