在Java中，字符串如何处理==操作符取决于它是如何构造的，这存在一些不一致性。

String a = "Hello";
String b = "Hello";
System.out.println(a == b ); // prints true.
String c = new String("Hello");
String d = new String("Hello"); 
System.out.println(c == d ); // prints false

通知7。一个有效程序的例子:

    Chomsky is a room. 
    A thought is a kind of thing. 
    Color is a kind of value. 
    The colors are red, green and blue. 
    A thought has a color. It is usually Green. 
    A thought can be colorful or colorless. It is usually colorless. 
    An idea is a thought in Chomsky with description "Colorless green ideas sleep furiously." 
    A manner is a kind of thing. 
    Furiously is a manner. 
    Sleeping relates one thought to one manner. 
    The verb to sleep (he sleeps, they sleep, he slept, it is slept, he is sleeping) implies the sleeping relation. 
    Colorless green ideas sleep furiously. 

像图灵机模拟器这样的其他愚蠢的东西可以找到。

在Lisp中，你可以复制一个列表，可以复制一个向量，可以复制一个结构体，可以复制一个CLOS对象……

．.． 但是不能复制数组或哈希表。

Commodore BASIC的命令快捷方式。基本上大多数命令都有一个缩写形式，通常是第一个字母+ (shift+第二个字母)。但是因为C64上的字符集默认都是大写的，这些命令看起来就像奇怪的符号。下面是一个hello world的简短例子:

也许有人有更好的例子，更有实质内容，但对于长程序来说，这看起来完全是荒谬的。

以下是缩略语列表:http://www.c64-wiki.com/index.php/BASIC_keyword_abbreviation

BrainFuck语言。真的是这样!

Perl的许多内置变量:

$# — not a comment! $0, $$, and $? — just like the shell variables by the same name $ˋ, $&, and $' — weird matching variables $" and $, — weird variables for list- and output-field-separators $! — like errno as a number but strerror(errno) as a string $_ — the stealth variable, always used and never seen $#_ — index number of the last subroutine argument... maybe @_ — the (non)names of the current function... maybe $@ — the last-raised exception %:: — the symbol table $:, $^, $~, $-, and $= — something to do with output formats $. and $% — input line number, output page number $/ and $\ — input and output record separators $| — output buffering controller $[ — change your array base from 0-based to 1-based to 42-based: WHEEE! $} — nothing at all, oddly enough! $<, $>, $(, $) — real and effective UIDs and GIDs @ISA — names of current package’s direct superclasses $^T — script start-up time in epoch seconds $^O — current operating system name $^V — what version of Perl this is

还有很多这样的东西。点击这里阅读完整列表。