Strangest language feature discussion at StackOverflow

2010-02-08

javascript
c
wtf

I must admin that I read mainly C, JavaScript and PHP ones. My favourites:

C

a[10] == 10[a]
"Hello World"[i] == [i]"Hello World"
a[b][c] == b[c[a]]
"0123456789abcdef"[x & 0xf]

#define EVER ;;
for(EVER){}

// down to "operator"
for (x=20 ; x --> 0 ;){}

JavaScript

alert('2' + '1.2');     // 21.2 (concatenation)
alert('2' - - '1.2');   // 3.2 ("cast" to numeric and add)
alert(~~ -1.7);	        // -1 (removes metric part)
alert(typeof (+'1'));   // 'numeric' (casting to "numeric")

… and of course JavaScript truth table. {: