Since our earliest days of writing software, we were warned of the perils of global data—how it was invented by demons from the fourth plane of hell, which is the resting place of any programmer who dares to use it. And, although we are somewhat skeptical about fire and brimstone, it’s still one of the most pungent odors we are likely to run into. The problem with global data is that it can be modified from anywhere in the code base, and there’s no mechanism to discover which bit of code touched it.
😂
