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If you have not worked through the challenges in this book, you are not alone! We are all busy, and it is quite tempting to think about a challenge momentarily and to then glance at the solution. That is certainly an ordinary experience, but you have the potential to become an extraordinary developer. Go back and rework the challenges, turning to the solutions only when you think you've got a correct answer or when you're completely stumped. Work through the challenges now; don't kid yourself that you'll somehow have more time later. By exercising your patterns knowledge on these challenges, you'll build the confidence you need to start applying patterns in your work.

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