re: Write a function that shows off something unique or interesting about the language you're using VIEW POST

FULL DISCUSSION
 

JavaScript lets you swap variables without a temporary variable.

$ node
> let a = 1, b = 999
undefined
> [b, a] = [a, b]
[ 1, 999 ]
> a
999
> b
1
 

So does C:

int a = 1, b = 999;
a ^= b;
b ^= a;
a ^= b;

OK, so this is specific to numeric values, actually, but it comes in handy in cryptographic code for constant time conditional swaps and things.

 

Thanks Dave.
There is no end to learning.
I feel humbled :)

 

Same in Python

>>> [a, b] = [1, 999]
>>> a, b
(1, 999)
>>> [b, a] = [a, b]
>>> a, b
(999, 1)
 

Python has been on my mind lately. That's yet another good reason ;p

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