Consider the following switch statement: switch( value ) { case 1: return 1; default: value++; // fall-through case 2: return value * 2; } This code compiles, but is it valid (= defined behavior) for C90/C99? I have never seen code where the default case is not the last case. EDIT: As Jon Cage and … Read more
Through a little typo, I accidentally found this construct: int main(void) { char foo = ‘c’; switch(foo) { printf(“Cant Touch This\n”); // This line is Unreachable case ‘a’: printf(“A\n”); break; case ‘b’: printf(“B\n”); break; case ‘c’: printf(“C\n”); break; case ‘d’: printf(“D\n”); break; } return 0; } It seems that the printf at the top of … Read more
I am looking for the correct syntax of the switch statement with fallthrough cases in Bash (ideally case-insensitive). In PHP I would program it like: switch($c) { case 1: do_this(); break; case 2: case 3: do_what_you_are_supposed_to_do(); break; default: do_nothing(); } I want the same in Bash: case “$C” in “1”) do_this() ;; “2”) “3”) do_what_you_are_supposed_to_do() … Read more
How do I write a switch for the following conditional? If the url contains “foo”, then settings.base_url is “bar”. The following is achieving the effect required but I’ve a feeling this would be more manageable in a switch: var doc_location = document.location.href; var url_strip = new RegExp(“http:\/\/.*\/”); var base_url = url_strip.exec(doc_location) var base_url_string = base_url[0]; … Read more
This question already has answers here: Closed 9 years ago. Possible Duplicate: C# – Is there a better alternative than this to ‘switch on type’? C# doesn’t support switching on the type of an object. What is the best pattern of simulating this: switch (typeof(MyObj)) case Type1: case Type2: case Type3: 5 Answers 5
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 5 months ago. The community reviewed whether to reopen this question 5 months ago and left it closed: Opinion-based Update the question … Read more
What is the benefit/downside to using a switch statement vs. an if/else in C#. I can’t imagine there being that big of a difference, other than maybe the look of your code. Is there any reason why the resulting IL or associated runtime performance would be radically different? Related: What is quicker, switch on string … Read more
In Swift you can check the class type of an object using ‘is’. How can I incorporate this into a ‘switch’ block? I think it’s not possible, so I’m wondering what is the best way around this. 4 Answers 4
Is there a way of using an ‘OR’ operator or equivalent in a PHP switch? For example, something like this: switch ($value) { case 1 || 2: echo ‘the value is either 1 or 2’; break; } 12 Answers 12
Integer i = … switch (i) { case null: doSomething0(); break; } In the code above I can’t use null in the switch case statement. How can I do this differently? I can’t use default because then I want to do something else. 13 Answers 13
