VB。网

The behavior AndAlso / OrElse and And / Or seems backwards. Perhaps they should be switched. When can only be used for exception catching. The ability to do a When conditional would be nice for some other things. There is no friggin Refactoring in the VS IDE (not really the language's fault) like there is with C# Not <obj> Is Nothing. Yes, this has been remedied by IsNot, but for some reason I see the Not Is being used too often. (I see it much more frequently with devs who speak english as a second language, does it make better sense from that angle?) It doesn't require the () on ToString() and most functions. (Leads to sloppy coding habits) Having to do _ when breaking a line. It allows optional parameters. (Leads to sloppy coding habits) declaring an array is done by UpperBound and not by capacity. "Dim arr(2) as String" will actually hold 3 elements. Having = be a comparison and assignment operator.

C / C + +

缺乏完整的SWAP功能 模板的语法 你不能#define一个#define(没有多通道) 编译器之间的结构打包不兼容 Char是有符号的还是无符号的?

Java

边缘上的不变性 没有像c#一样的ref关键字 到处尝试/捕捉积木 运行时性能差 所有与字符串相关的东西

Python

没有“main”(我已经习惯了!) 强调关键词 有限的线程支持 用self代替this 缺少类似C/ c++的语法

Objective-C / Cocoa / Cocoa Touch:

Lack of namespaces Difficulty using primitive values with any of the interesting and powerful techniques of Cocoa, e.g., distributed objects, notifications, KVO Inconsistency with the use of the shortcut dot syntax for accessing properties, often having to use the full length accessors No GC on the iPhone, and generally GC came rather late to an otherwise highly dynamic language Inconsistent library support, at least in Cocoa Touch; some very basic things have only recently gotten high level support, e.g., audio handling. Lack of blocks!

生存巨:

标准库的奇怪之处:它并不总是显示最佳实践，而且文档不足 硬编码FunctionX, TupleX类 缺乏属性:getter和setter是分开的，这违反了DRY，并且使得像FRP这样的事情几乎不可能实现 需要= _来初始化属性

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.

JavaScript

ECMAScript 5规范:

7.6.1.2未来保留词: 类，enum, extends, super, const, export， 进口 严格模式:实现、let、private、public、interface、package、protected、static、yield 11.9.4严格等于操作符(===)对比11.9.1 TheEqualsOperator(==) 11.9.6严格相等比较算法(NaN === NaN is false) 8.5数字类型-没有实整数，所有都是浮点数。 4.2.1对象——原型继承

好吧，我有点喜欢最后一个，但它有7种让人困惑的地方