我正在对初级(也许是高级)软件工程师所犯的常见错误和错误假设进行一些研究。

你坚持时间最长、最终被纠正的假设是什么?

例如,我误解了整数的大小不是标准的,而是取决于语言和目标。说起来有点尴尬,但事实就是这样。

坦率地说;你有什么坚定的信念?你大概坚持了多长时间?它可以是关于一种算法、一种语言、一个编程概念、测试,或者任何关于编程、编程语言或计算机科学的东西。


当前回答

我很早就开始学习编程了。那时我14岁左右。我有各种疯狂的想法,但不要问我准确的时间,因为那是很久以前的事了。

Ok, so, I believed for a while that if you use the term synchronize in Java, then Java solves this nasting synchronizing thing for you I believed for at least half a year, likely more, that static typing would improve performance. I believed that freeing something would return memory back to the OS. I believed that malloc calls boil down to checking if there is enough free space on the OS, so malloc would be inexpensive. I thought a long while that Java was built with all the benefits and flaws of the other languages in mind, into a "perfect blend" that would take the best properties of the other languages and reject the mistakes. I vastly overestimated the number of cases where LinkedLists outperform ArrayLists. I thought that NP-hardness was a proof that no INSTANCE could be solved efficiently, which is trivially false, for a while. I thought that finding the best flight-plan on travel agency web sites would take so long because of the "Travelling Salesman Problem", as I proudly chuckled to my relatives (when I was small, alright?!)

还能想出更多。不知道我坚持了多久。对不起。

PS: 啊,好吧,这个被清除得并不慢,但我看到新手时不时地这样做,所以我想你可能会感兴趣:我还认为要存储不确定数量的东西,你需要为每个东西声明一个新变量。所以我要创建变量a1 a2 a3…,而不是使用一个变量a,我将它声明为一个向量。

其他回答

640K应该足够任何人(DOS)。多年来,很多人都相信这一点。

当我第一次拥有8MB内存的系统时,我认为这远远超过了我的需求。它可以运行操作系统(Mac)以及我使用的所有应用程序(Word、Email、Firefox等)。

ide会变得更快。

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……

一个WTF总是一个糟糕专业的证据。

事实上,我最近才意识到在我的职业生涯中有多少WTF,但当StackOverflow告诉我它们只是另一个软件指标时,我感到欣慰。

我需要定义所有的变量,我将使用在我的函数在其开始(Pascal风格)。

我曾经相信我需要考虑我的函数使用的所有资源,并在我开始编码之前定义它们,这可能是因为我的第一门语言是Pascal,这是要求。然后当我转移到C语言时,我会定义只在这些循环之外的循环中使用的临时变量,忽略循环内作用域,只是为了“一切都将在开始时定义”。

我花了几年时间才明白,提前定义所有资源并不是一件容易的事,而且范围本身对代码可读性非常重要。