在你看来,你遇到过的最令人惊讶、最怪异、最奇怪或最“WTF”的语言特性是什么?

请每个回答只回答一个特征。


当前回答

我想到的第一件事是“noop”,当我第一次看到它时,我的大脑也做了同样的事情!

其他回答

在JavaScript中:

 '5' + 3 gives '53'

 '5' - 3 gives 2

INTERCAL可能是最奇怪的语言特征的最佳汇编。我个人最喜欢的是COMEFROM语句,它(几乎)与GOTO相反。

COMEFROM is roughly the opposite of GOTO in that it can take the execution state from any arbitrary point in code to a COMEFROM statement. The point in code where the state transfer happens is usually given as a parameter to COMEFROM. Whether the transfer happens before or after the instruction at the specified transfer point depends on the language used. Depending on the language used, multiple COMEFROMs referencing the same departure point may be invalid, be non-deterministic, be executed in some sort of defined priority, or even induce parallel or otherwise concurrent execution as seen in Threaded Intercal. A simple example of a "COMEFROM x" statement is a label x (which does not need to be physically located anywhere near its corresponding COMEFROM) that acts as a "trap door". When code execution reaches the label, control gets passed to the statement following the COMEFROM. The effect of this is primarily to make debugging (and understanding the control flow of the program) extremely difficult, since there is no indication near the label that control will mysteriously jump to another point of the program.

我在试图找出一个完全没有意义但无论如何都能工作的MACRO时遇到了这个。这对于objective-c是正确的,但对于其他类型的C(或者至少是gcc编译器)也可能是正确的。

NSString *oneString = @"This " @"is " @"just " @"one " @"normal " @" string";

=

NSString *oneString = @"This is just one normal string";

C风格的字符串也是如此

char* str = "this " "also " "works";

A very tiny thing that annoyed me in COBOL was that there was no dedicated modulo operation. Instead you could do a division specifying that you only wanted whole number results and store the rest in a different variable. Since COBOL is very sensitive when it comes to variables that means that you ended up with a variable you didn't really need, i.e. the actual result of the division. This is the story of how I once named a variable "USELESS" - that was the most appropriate name I could think of.

我喜欢在C中插入八进制值:

int values[8] = { 123, 154, 103, 310, 046, 806, 002, 970 };