JavaScript

Function object syntax: f = new Function( "foo", "bar", "return foo+bar;" ); (It takes n arguments, the first n-1 are arguments for the function, then nth is the actual function, in string form. Which is just silly.) Function arguments can be repeated. f = new Function( "foo", "foo", "return foo;" ); The last repetition is the only one ever used, though: f( "bye", "hi" ) // returns "hi" f( "hi" ) // returns undefined E4X should just die. My users are always complaining that it doesn't work the way they think it will. Let's face it, when you need a page and a half of psuedocode for a setter, it's time to rethink things. A standard notion of stdin/stdout/stderr (and files!) would be nice. null != undefined It's irritating to have to handle them both. Sometimes it's useful, but most languages manage to limp along fine with one.

REBOL

REBOL是我最喜欢的语言之一。我不能说我有一个最喜欢的，尽管Haskell排名也很高。

Its odd syntax scares off many developers before they even give it a try. use [email rules url] [ ; A small DSL that sends email to people about URLs. rules: [ some [ into [ set email email! set url url! (send/subject email url reform [ "Check Out" url ]) ] ] ] ; Global context notify: func [ [catch] dsl [block!] ] [ unless parse dsl rules [ throw make error! "You screwed up somehow." ] ] ] notify [ [ a@b.com http://www.google.com ] [ b@c.com http://www.yahoo.com ] ] Recursive dialects are very easy to validate with PARSE but very difficult to evaluate. (Stacks can be helpful here.) REBOL has very poor integration with many popular technologies, particularly XML. I suspect this is partly arrogance, because the REBOL BLOCK! datatype can do almost everything XML can do. However, the real world has XML in it. No Unicode. Thanks to AltMe, REBOL's user community is very insular. I can understand why they want to use AltMe. It's written in REBOL and shows off its strengths. Unfortunately it also puts them off on their own little island.

即将到来的REBOL 3有望解决许多这些问题，除了最后一个。

C#

c#最让人讨厌的是:

(1)事件具有对所有侦听器的强引用，从而防止了侦听事件的任何东西的垃圾收集。如果你想看到这造成的问题，只需在网上搜索所有试图通过创建某种“弱引用事件处理程序”来解决问题的人。

(2)在调用一个事件之前，需要检查它是否等于null，这似乎应该由语言来处理。

(3) XML序列化器无法读取/写入XML文件中的注释。在手工修改XML文件和用c#编写的工具修改XML文件的环境中，情况并不好。可以通过使用原始的XmlDocument来解决，但如果能够将其抽象到一个类中会更好。

(4)构建过程不允许您直接访问xsd文件之类的东西，相反，您需要一个中间步骤，即创建一个c#部分类。这也会导致XAML文件出现问题，有时需要重新构建两次才能使更改正确地通过。

(5)不支持CPU intrinsic，如MMX和SSE 1,2,3,4，因此这些有价值的CPU特性在运行c#应用程序时无法使用。

其他没有进入我的前5名:

(6)不能将字段标记为属性，所有属性必须从一开始就显式地实现:

目前有:

public class MyClass {
    private int someInt;

    public int SomeInt {
        get {
                return someInt;
        }
        set {
                someInt = value;
        }
    }
}

想

public class MyClass {
    [IsProperty(public, get, set)]
    private int someInt;
}

(7)不支持多个返回值，例如:

public int, string, double MyFunction()
{
    ....
    return x,y,z;
}


public void TestMyFunction()
{
    int x, string y, double z = MyFunction();
}

(8)不支持协变返回类型

我对泛型实现有一些不满，但我就此打住。我认为c#是一种很棒的语言，可以完成所有的GUI、网络和配置管道，并且是我的首选语言，可以以一种可以长期支持的方式快速启动和运行。

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!

我讨厌Python的地方:

没有编译器 它没有被认真对待

Python让我恼火的地方:

(自我, 没有私人 打破兼容性

我讨厌PHP的五个方面:

“按预期工作”，而这显然是一个bug 没有转到 有bug的引用(foreach $arr => &$val…Foreach $arr => $val) 没有多重继承 没有一个编译器能够真正工作，而不需要向黑暗之神牺牲一只羔羊

C#

1)缺乏为值类型编写泛型的实际能力。例如，任何白痴(好吧，大多数白痴)都可以编写一个例程，用c++计算int, float, double等列表的标准偏差，它写起来很简单，易于阅读，并作为快速的非泛型代码执行。我认为，如果你能用c#写一些东西，接近于达到这三个中的任何一个，而在其他两个上又不荒谬，你就是一个真正伟大的程序员。

2)协方差和反方差，尽管这被添加到4。

3)非常糟糕的LINQ文档(好吧，并不是语言的一部分)。

4)尝试使用foreach/迭代器，当我每次都想做同样的事情，除了上次略有不同(如连接一串字符串与逗号之间的单词和最后两个)。如果我用一个IEnumerable来写它，它很难写和读，而用一个for (int I =0 I <…)它并没有好到哪里去，而且效率更低。

5)我知道我会收到抱怨，但是缺少受控的例外。这并不需要像在java中那样实现(框架开发人员确实提出了一些很好的观点，为什么他们没有这样做)，但我很乐意看到编译器警告不喜欢受控异常的用户可以关闭。