在不浪费字节和CPU周期的情况下编写高效的程序是非常重要的。

但随着经验的积累，它与字节或CPU周期无关，它与你的思想流有关，连续的，不间断的，就像一首诗。

本质上，不要太努力。

我一直认为，任何为任何语言编写任何代码的人都会使用编辑程序。

I was working with a client of mine who had me on mostly as support and to write some of the more complex things for him. Well one day he messed up a file, big time. He accidentally saved over three hours worth of his own work, and when I asked him why he didn't save more often he replied with, "because I wasn't done". Naturally, this was not an acceptable answer, and I poked and prodded a little further. I eventually came to find out that he he has never used any editing program, EVER! Not even notepad.exe! He had been using an online CPanel editor for files! It didn't even have a 'Find' function. He couldn't ever save until he was done because he was editing the live file on the site!

不用说，我很惊讶，他至今仍在使用CPanel编辑器……

XML名称空间(或者更糟，格式良好)在某种程度上比没有它们要困难得多。

一个非常常见的错误，甚至在W3C!

人们知道他们想要什么。

在很长一段时间里，我以为我会和人们交谈，他们会描述一个问题或工作流程，我将其放入代码并自动化。结果每次发生这种情况，他们以为自己想要的并不是他们真正想要的。

Edit: I agree with most of the comments. This is not a technical answer and may not be what the questioner was looking for. It doesn't apply only to programming. I'm sure it's not my longest-held assumption either, but it was the most striking thing I've learned in the 10 short years I've been doing this. I'm sure it was pure naivete on my part but the way my brain is/was wired and the teaching and experiences I had prior to entering the business world led me to believe that I would be doing what I answered; that I would be able to use code and computers to fix people's problems.

我想这个答案类似于Robin关于非程序员理解/关心我所谈论的内容的回答。这是关于将业务作为一个敏捷的、迭代的、交互的过程来学习。它是关于学习编程猴子和软件开发人员之间的区别。这是关于意识到两者之间的区别，并且在该领域真正优秀，不仅仅是语法和输入速度。

编辑:这个答案现在是社区-wiki，以安抚人们对这个答案感到不安，给我代表。

作为一名老的过程式程序员，当我第一次开始为一个业余项目用Java编程时，我并不真正理解OO。编写了大量的代码，却没有真正理解接口的意义，试图通过将所有东西都强制放到继承层次结构中来最大化代码重用——当一个层次结构无法容纳清理时，希望Java具有多重继承。我的代码成功了，但我现在对早期的东西感到畏缩。

When I started reading about dynamic languages and trying to figure out a good one to learn, reading about Python's significant whitespace turned me off - I was convinced that I would hate that. But when I eventually learned Python, it became something I really like. We generally make the effort in whatever language to have consistent indent levels, but get nothing for it in return (other than the visual readability). In Python, I found that I wasn't doing any more effort than I had before with regard to indent levels, and Python handled what I'd been having to use braces or whatever for in other languages. It makes Python feel cleaner to me now.

事实证明，在Linux下是否检查内存分配是否返回一个引用并不重要，因为它实际上会欺骗你，在未来的某个时候实际分配内存，或者如果它没有你需要的内存，就完全终止你的程序。