objective - c 2.0

严格遵循语言和运行时，而不是库，并且没有任何特定的顺序:

Lack of cVars. No modules. I'm not terribly unhappy with a lack of namespaces, but modules would be nice to have. Ivar-based property syntax requires declarations using the variable name in 3 places. It's fairly hideous. C heritage. Anything to hate about the C language, except for OO and GC, is present. Objects can't live on the stack. Not a problem with Obj-C so much as what it does to programming practices in other languages. I find it strange when I get a return value on the stack in C++, for instance. If I'm not actually looking at the library documentation when I write the code, I'll assume that every function returns a pointer, which often makes for some siginificant cleanup later.

C#

No easy way to check if a type is Numeric It means you are probably stuck using most of the microsoft stack, IIS and MSSQL Instead of being a specific tool for a specific problem, C# tries to be a language for every paradigm. Lack of community. Sure, there are starting to be open-source frameworks and libraries for C#. The same ones that have been available to Java developers for years. Hard to find good help. The internet is littered with poor examples of how to solve problems with C#. This goes back to problem #3.

计划

缺少静态类型 没有静态函数重载(由于上述原因)导致字段访问器的名称很长 没有统一的对象系统 有点慢 相对较小的社区

Javascript;

the dynamic binding of "this" is very confusing and dangerous if you don't know exactly what you're doing. a function declaration requires the keyword "function". It's not the typing I object to, it's the reading it when I want to do something slightly clever. Hrm now I think of it maybe that's a plus. Discourages me from doing clever things. As a result of number 2, it's often less code (in terms of characters) to just copy/paste a code segment than to declare it as a function, if it's a fairly short idiom. This unfortunately promotes bad practice, especially in my own code. Javascript makes motions at being a functional language by having first class functions and closures, but there's no way to verify referential transparency in a function, at either runtime or compile time. Without this, some architectures become either risky or bulky. Its fantastically bad reputation, and thus my inability to say "I program in javascript" to anyone without being laughed at.

再给c++投一票…仍然是我最喜欢的语言，有几个亲密的追随者——C和Python。以下是我目前最讨厌的名单，排名不分先后:

Plethora of integer types inherited from C - way too many problems caused by signed vs. unsigned mistakes Copy constructors and assignment operators - why can't the compiler create one from the other automatically? Variable argument madness - va_list just doesn't work with objects and I'm so sick of problems created with sprintf(), snprintf(), vsnprintf(), and all of their relatives. Template implementation is required to be fully visible at compile time - I'm thinking of the lack of "export" implementations or at least usable ones Lack of support for properties - I want to have a read-only member like "a.x" that can be read publicly and only assigned internally. I really hate the "val=obj.getX()" and "obj.setX(val)". I really want properties with access control and a consistent syntax.

Ruby:

太慢了 自负的群体 这不是闲谈 在nil上调用方法时出错，而不是返回nil à la Objective C 非线程