Whether it's in PHP, Python or JS, this type of anti-pattern is considered as such for good reason. I don't know how many days (months?) of my life have been wa

Whether it's in PHP, Python or JS, this type of anti-pattern is considered as such for good reason. I don't know how many days (months?) of my life have been wasted debugging "why is this variable changing, and from where?!?". Accompanied of course by much cursing the developer to the n-th generation who thought it would be a good idea to use a global variable.