3 ms·

I am happy to not see Ruby represented here.

• judofyr 16y ago
  Just on the top of my head: 1. The flip-flop >> s = true >> (1..10).reject { true if (s = !s) .. (s) } => [1, 3, 5, 7, 9] 2. A snake in my Ruby?!? # Works in both Python and Ruby print """Hello World""" 3. END vs at_exit END { puts "Ruby has END ..." } at_exit do puts "... and at_exit" end puts "Do you know the difference?" 4. BEGIN/END wtf? # Have you ever seen these in production code? BEGIN {} END {} 5. The wonders of a single space # Returns the position where the regexp matches "foobar", # or nil if no match. def get(regexp = /bar/) regexp =~ "foobar" end get /1#/ # => nil get / 1#/ # => 3 <- WTF? 6. Local variable tables; don't we all love them? def get(regexp = /bar/) regexp =~ "foobar" end get /1#/ # => nil get = 5 get /1#/ # => 5 get / 1#/ # => 5
  • derefr 16y ago
    Just guessing that your #4, BEGIN and END, are for using Ruby like awk (that is, from the shell—you should never see them in a script.) Try this (and cringe): cat /usr/share/dict/words | ruby -lne 'puts $_.reverse; n = (n || 0) + 1; END{ puts "total: #{ n }" }'
• deleted 16y ago
  [deleted]