Does any language have a unary boolean toggle operator?

Toggling the boolean bit … that would allow me to abbreviate a = !a without repeating the expression for a … This approach is not really a pure “mutating flip” operator, but does fulfill your criteria above; the right hand side of the expression does not involve the variable itself. Any language with a boolean … Read more

Negation in Python

The negation operator in Python is not. Therefore just replace your ! with not. For your example, do this: if not os.path.exists(“/usr/share/sounds/blues”) : proc = subprocess.Popen([“mkdir”, “/usr/share/sounds/blues”]) proc.wait() For your specific example (as Neil said in the comments), you don’t have to use the subprocess module, you can simply use os.mkdir() to get the result … Read more

How to filter an array of objects based on values in an inner array with jq?

Very close! In your select expression, you have to use a pipe (|) before contains. This filter produces the expected output. . – map(select(.Names[] | contains (“data”))) | .[] .Id The jq Cookbook has an example of the syntax. Filter objects based on the contents of a key E.g., I only want objects whose genre … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)