本文介绍了提高编程效率的方法，建议初学者尽量避免使用显式的for循环，并推荐先实现算法再逐步进行向量化优化，确保代码正确性的同时提升性能。
1.Whenever possible, avoid using explicit for-loops in your code.
2.Thus, for your first few programs, you might choose to first implement your algorithm without too many vectorization tricks, and verify that it is working correctly (perhaps by running on a small problem). Then only after it is working, you can vectorize your code one piece at a time, pausing after each piece to verify that your code is still computing the same result as before. At the end, you'll then hopefully have a correct, debugged, and vectorized/efficient piece of code.
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