This is horrible advice! In the real world, you will encounter a variety of bad outcomes utilizing it. If you are ready to leave, you're giving up control of

This is horrible advice! In the real world, you will encounter a variety of bad outcomes utilizing it. If you are ready to leave, you're giving up control of when and how once you tell your boss. It's exceptionally naive to think that everyone will structure the nature and timing for your benefit instead of theirs and/or the company. You may be asked to resign on the spot or give notice. In some secure environments you may be walked out by security on the spot. Additionally, if your plans fall through or you have a change of heart, you will be regarded as disloyal, which may follow you and impede future promotions or assignments. Finally, if you have a vindictive boss with contacts in the industry or destination company, they can quash existing or pending job offers to keep you or punish you. Cf. Jobs/Apple/Google