Lua:

元表是如此令人困惑，直到他们“点击” 缺少像a += 20这样的赋值操作符是一种痛苦 没有集成的面向对象的解决方案意味着每个人和他的狗都使用自己的口味 用于注释(——)的语法排除了加/减前后操作符的可能性 不入侵C端就不可能有任何先发制人的多任务系统

Objective Caml

Non-concurrent garbage collector. I can write multi-threaded programs all day long, but they're only ever going to get one of my eight cores at a time. This makes me sad. No type classes (or their moral equivalent). There's Furuse-san's GCaml, but it's A) not quite as good as type classes, and B) not in the INRIA distribution. Badly in need of a Cocoa bridge. Seriously. If I wrote more code with actual interfaces to DNA-based life forms, then I'd probably break down and write the damned thing myself. Why hasn't anybody else done this yet? Functors are abominable. Seriously, modules ought to be first-class values. There should be only one kind of function. Read Montagu and Rémy before you flame me for this. Should use LLVM for its back-end. Who do I have to murder to get OCaml to compile for my stupid little ARM6 core?

是的，我有一些问题。我仍然非常喜欢这门语言。这太棒了。

C++

The inconsistencies in the libraries related to char* and std::string. All C++ libs should take std::strings. Characters are not bytes with respect to iostream. I do a lot of byte-oriented work. Having a "byte" type and a "character" type would significantly make it simpler. That, too, would permit scaling to Unicode somewhat easier. Bit operations should be easy on a value. I should be able to access and set the n'th bit of a value without playing AND/OR dancing. The lack of a standardized interface for GUIs. This is where Microsoft has really been able to position themselves well with C#. A standard interface binding that OS makers provide would go really far for my work.

JavaScript

数字作为字符串-数学可以 数字令人沮丧 解释为字符串。5 + 2 = 52? 叽阿… 权限-所有最好的东西都需要用户的权限! 屏幕更新—浏览器必须处于稳定状态才能更新屏幕。似乎没有一种方法可以强制在脚本中间更新屏幕。 慢-虽然谷歌的Chrome很好… 浏览器的差异使语言的使用[审查]。

c# / .net:

Classes should be sealed by default There should be no lock statement - instead, you should have specific locking objects, and there should be methods such as Acquire which return disposable lock tokens. Corollary: there shouldn't be a monitor for every object. GetHashCode() and Equals() shouldn't be in System.Object - not everything's suitable for hashing. Instead, have an IdentityComparer which does the same thing, and keep the IComparer<T>, IComparable<T>, IEqualityComparer<T> and IEquatable<T> interfaces for custom comparisons. Poor support for immutability Poor way of discovering extension methods - it should be a much more conscious decision than just the fact that I'm using a namespace.

这些都是我想出来的，明天问我，我会想出一个不同的5个:)

Python

错误/异常在调试时是模糊的 我工作时不用 在类中使用__init__， __repr__， __str__等 不能简单地编译可执行文件(.exe或其他) 还有一件事我还没试过，但肯定会让我心烦

对于所有的c语言程序员来说，self对我来说更有意义，因为对象引用的是它的self