To all the masochists who spent hours debugging misspellings:

1. Learn your tools
2. Learn good practice

Every IDE should point out when you're not using a variable you've initiated or using an uninitiated variable as well as at least highlight, if not simply list, every occurrence of the variable under your cursor and let you find all references or even display the number of references next to a variable at all times, and finally, every IDE should autocomplete for you so when it doesn't you know you've messed up. Good IDE makes all the easy mistakes hard and all of the hard tasks easy. Including running tests. If you don't know how to configure your IDE to do all these things take time and learn it. If you still can't figure it out, replace your IDE maybe...?

Also use the debugger. Preferably one that nicely integrates with your IDE. If you don't, check point 1.

Also write tests and *run them*.

Also if your misspellings tend to consist of a missing `s` at the end of a plural noun just call it `entityCollection` instead of `entities`. And read up on more good programming practices and naming conventions.