truthiness – Tarik Billa

Is !! a best practice to check a truthy value in an if statement

April 8, 2024 by Tarik

!!value is commonly used as a way to coerce value to be either true or false, depending on whether it is truthy or falsey, respectively. In a control flow statement such as if (value) { … } or while (value) { … }, prefixing value with !! has no effect, because the control flow statement … Read more

Truth value of empty set

June 13, 2023 by Tarik

After looking at the source code for CPython, I would guess this is a documentation error, however, it could be implementation dependent and therefore would be a good issue to raise on the Python bug tracker. Specifically, object.c defines the truth value of an item as follows: int PyObject_IsTrue(PyObject *v) { Py_ssize_t res; if (v … Read more