I have found page no 42 in “The Swift Programming Language (Swift 2.2 Prerelease)” where it states explicitly the following: Another way to handle errors is to use try? to convert the result to an optional. If the function throws an error, the specific error is discarded and the result is nil. Otherwise, the result … Read more
You can use one code base on Pythons 2.5 through 3.2, but it isn’t easy. You can take a look at coverage.py, which runs on 2.3 through 3.3 with a single code base. The way to catch an exception and get a reference to the exception that works in all of them is this: except … Read more
Just write pass as in try: # Do something illegal. … except: # Pretend nothing happened. pass EDIT: @swillden brings up a good point, viz., this is a terrible idea in general. You should, at the least, say except TypeError, DivideByZeroError: or whatever kinds of errors you want to handle. Otherwise you can mask bigger … Read more
Just write pass as in try: # Do something illegal. … except: # Pretend nothing happened. pass EDIT: @swillden brings up a good point, viz., this is a terrible idea in general. You should, at the least, say except TypeError, DivideByZeroError: or whatever kinds of errors you want to handle. Otherwise you can mask bigger … Read more
Finally always executes. That’s what it’s for, which means its return value gets used in your case. You’ll want to change your code so it’s more like this: function example() { var returnState = false; // initialization value is really up to the design try { returnState = true; } catch { returnState = false; … Read more
No. See A Pragmatic Look at Exception Specifications for reasons why not. The only way you can “help” this is to document the exceptions your function can throw, say as a comment in the header file declaring it. This is not enforced by the compiler or anything. Use code reviews for that purpose.
Firefox interprets function statements differently and apparently they broke declaration hoisting for the function declaration. ( A good read about named functions / declaration vs expression ) Why does Firefox interpret statements differently is because of the following code: if ( true ) { function test(){alert(“YAY”);} } else { function test(){alert(“FAIL”);} } test(); // should … Read more
To return a value when using try/catch you can use a temporary variable, e.g. public static double add(String[] values) { double sum = 0.0; try { int length = values.length; double arrayValues[] = new double[length]; for(int i = 0; i < length; i++) { arrayValues[i] = Double.parseDouble(values[i]); sum += arrayValues[i]; } } catch(NumberFormatException e) { … Read more
A slight change to the second looks pretty nice and simple. I really doubt you’ll notice any performance difference between the two, and this is a bit nicer than a nested try/excepts def something(a): for methodname in [‘method1’, ‘method2’, ‘method3’]: try: m = getattr(a, methodname) except AttributeError: pass else: return m() raise AttributeError The other … Read more