This is arguable and pure aesthetic question. Early return has been historically avoided in C and similar languages since it was possible to miss resource cleanup which is usually placed at the end of the function in case of early return. Given that Java have exceptions and try, catch, finally, there’s no need to fear … Read more
A more explicit way to check if file is actually a file and not directory for example, and it is readable: from os import access, R_OK from os.path import isfile file = “/some/path/to/file” assert isfile(file) and access(file, R_OK), \ f”File {file} doesn’t exist or isn’t readable”
The VBA line-continuation character is an underscore _ if ( _ (something) _ or (somethingelse) _ )
You could check with the result of the first check. This is an exclusive OR check. // typeof inverse === ‘boolean’ function handleDirection(src) { if (src === ‘left’ === inverse) { tracker–; } else { tracker++; } } The check evaluates the expression in this order (src === ‘left’) === inverse: src === ‘left’ === … Read more
There is no clean way to solve this with switch, as cases need to be integral types. Have a look at if-else if-else.
Use &&/AND/and, not ||/OR/or: v != “x” && v != “y” && v != “z” Problem If an if block is always executed, the condition for the if block always evaluates to true. The logical expression must be wrong. Let us consider v != “x” || v != “y” || v != “z” for each … Read more
CASE … WHEN … END is an expression. It can be nested like any other expression. CASE WHEN condition THEN CASE WHEN othercondition THEN …. END END
All it really means is that if statements now support pattern matching like switch statements already have. For example, the following is now a valid way of using if/else if/else statements to “switch” over the cases of an enum. enum TestEnum { case One case Two case Three } let state = TestEnum.Three if case … Read more