Haskell。

默认情况下导入Prelude。 类型类的范围是通用的。 模块不是一流的。 类型不能依赖于值。 单子不统一Functor。

Scala是我最喜欢的语言。五件讨厌的事?容易:

Takes a long time to learn properly. I know you can write Scala as a 'better java'. That is what we used to say about C++ and C too. I agree this is an inevitable consequence of the deep ideas in the language. But still ... Methods vs. Functions: def f(x: Int) = x*x defines a method f, not a function f. Methods are not functions despite a lot of early Scala tutorial material blurring the distinction. The language tries to blur it too because if you supply a method in some places where a function is expected it is accepted. Do we have to have both methods and functions? Yes it is fundamental. But it was initially confusing to me. Composing classes or objects from mixins in the 'cake' pattern is prone to NPE's. e.g. trait X { val host: String; val url = "http://" + host } is a mixin that will NPE on instantiation, or not, depending on its position in the class declaration. The compiler could tell you if it will fail but doesn't. (In 2.7 anyway.) It is hard to diagnose the problem in complex inheritance graphs. Arrays in 2.8 rely on implicits to mesh with the main scala collection types. But implicits are not applied everywhere. An Array can be supplied where a Seq is expected. But an Option[Array] cannot be supplied where an Option[Seq] is expected. I know there are no completely 'right' ways to handle java Arrays. Type erasure. Enough said.

HyperTalk:

很久很久以前就死了 没有简单的赋值(你不能说a:= 3，你必须说把3放进a 没有嵌套函数 没有真正的数据结构，只有字符串。要创建“列表”，您可以使用itemDelimiter分隔项并手动转义它们。你也可以得到行和单词比如txt的第5行第2个单词

说句题外话，我认为HyperTalk最酷的独特功能之一是特殊的it变量:

ask "How many years old are you?"
answer "You are " & it*12 & " months old."

Quenya

• Community is too small. It's next to impossible to get a good language-immersion program going when there's no easy to find another speaker nearby. • Irregular verbs. Yes, I know English and Spanish mentioned them, too, but Quenya was invented. Why does there still need to be irregular verbs? • No Unicode support. I have to have three different Tengwar fonts on my computer before I can read most messages, and several of them are poorly kerned. This wouldn't really be a huge issue given the existence of a Romanized transcription, but Tengwar is so beautiful, you don't not want to use it. • Not all concepts can be easily referenced in Quenya, leading to annoying circumlocutions, or resorting to Sindarin, Númenórean, or (Manwë save me) Klingon to get my point across.

Java

已检查的异常 类型擦除 缺少操作符重载(例如BigInteger/BigDecimal) 缺少regexp/date/duration /复杂文字 对不可变性的支持很差

C++

(除了lambda函数，我已经避免了Cpp0X中可用的东西)

不强制使用"this"访问成员变量，::GlobalFunction访问全局命名空间。 (更具体地说，算法中缺少lambda函数，将在0x thou中修复)中的所有内容 处理依赖文件/头文件和源文件 基本数据类型上的愚蠢名称(应该命名为uint8, int16等) const_cast功能