Executing tasks once
sync.Once – the deceptively simple tool in the sync package that promises a safe haven of “run this code only once” logic. Can this tool save the day once again (pun intended)?
Imagine a group of hyperactive squirrels all scrambling toward the same acorn. That first lucky squirrel gets the prize; the rest are left staring at an empty spot, wondering what the heck just happened. That’s sync.Once for us. It’s great when you genuinely need that single-use, guaranteed execution – the initialization of a global variable, for example. But for anything more intricate, prepare for a headache.
If you are a Gen-X/Millennial Java enterprise person, you might suspect that sync.Once is just a lazy initialization, singleton pattern implementation. And yes! It is precisely that! But if you’re a Gen-Z, let me explain in simpler, non-ancient words – sync.Once stores a boolean and a mutex (think of it like a locked door...
