Re:Why we don't hire programmers based on puzzles and tricks
by steveklabnik on Friday February 22, 2013 @02:41PM
(#5266255)
Also, it depends on which language you're using...
$ irb
irb(main):001:0> a = 1
=> 1
irb(main):002:0> b = 2
=> 2
irb(main):003:0> b, a = a, b
=> [1, 2]
irb(main):004:0> puts "#{a} #{b}"
2 1
=> nil
Re:Why we don't hire programmers based on puzzles and tricks
by michaelfairley on Friday February 22, 2013 @03:03PM
(#5266422)
You can also follow the letter in C, Java, etc.:
a ^= b
b ^= a
a ^= b
Re:Why we don't hire programmers based on puzzles and tricks
by jervisfm on Friday February 22, 2013 @07:12PM
(#5267826)
What does that do?
Re:Why we don't hire programmers based on puzzles and tricks
by steveklabnik on Friday February 22, 2013 @07:37PM
(#5267901)
Re:Why we don't hire programmers based on puzzles and tricks
by jervisfm on Friday February 22, 2013 @11:03PM
(#5268498)
Thanks for the pointer.
Re:Why we don't hire programmers based on puzzles and tricks
by simcop2387 on Friday February 22, 2013 @06:08PM
(#5267534)
Just to add a perl version for the ruby and python ones.
($a, $b) = ($b, $a)
Re:Why we don't hire programmers based on puzzles and tricks
by chris_mahan on Friday February 22, 2013 @03:55PM
(#5266729)
python: a, b = b, a
a = a + b
requires the (invisible) presence of a register where a + b (or xor or whatever) is placed right before being written back to a. But then you might as well use this register directly for the swap instead of dabbling around with one-to-one functions.