01 /Projects

What it taught me

1. 01

   A retry loop with three attempts but only two delays. Index out of range on the final attempt.

   //When two numbers have to stay in step, derive one from the other instead of writing both down.

2. 02

   A nil check that could never fire. strings.Fields never returns nil, not even for an empty string, so the guard was dead code and the next line would have panicked.

   //Check the property you need, not something you assume stands in for it. nil does not mean empty, it means never allocated.

3. 03

   A semaphore where failed requests kept their slot. Two failures froze the crawler forever. It did not crash, which made it harder to find.

   //A resource is returned on every exit path, errors included. Holding it on failure is not a penalty, it is a leak.