Swap the Values of Two Variables Without Using a Third Variable(ajibanda.com)

3 pointsby ajibanda14 lat temu2 comments

Swap the Values of Two Variables Without Using a Third Variable

http://www.ajibanda.com/2012/05/programmers-interview-101-swap-values.html#.T8WzNpEAKKY.hackernews

1 comments

I have to say that I'm upvoting this - it's wonderful.

The real value in this question is to ask a candidate what's wrong with this article. There are just so many things wrong with it that it's a great starting place for any number of technical conversations.

This is particularly good:

  a = a*b
  b = a/b
  a = a/b

What if b==0? How accurate is it if a and b are floats? So many technical launching points.

ajibanda14 lat temu

great find.. I never thought of that..