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Ruby - where one statement ends and the next begins

In Ruby, you can end your statements with a ;, but it's more usual to simply let them end at the end of a line. Ruby can usually identify where a statement ends and if it clearly doesn't end on one line, it carries on to the next.

Just occasionally, this can be little bit of a trap. Look at this code with teo apparently identicsl statements giving different results. Why?

  a = 5
  b = a
    + 6
  puts b
  b = a +
    6
  puts b
  
  __END__
  
  trainee@kingston:~/lrp$ ruby ld
  5
  11
  trainee@kingston:~/lrp$


The answer is that Ruby has split the first "statement" into two - whereas the second example clearly continued from one line to the next and was treated as a single statement.

It's great to be teaching Ruby this week - see our Ruby Courses ... and I'll be going on to Cucumber and Gherkin over the next couple of days.
(written 2015-05-26, updated 2015-05-27)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
R101 - Ruby - Introduction
  [4369] Ruby - the second rung of learning the language - (2014-12-28)
  [2607] Answers on Ruby on Rails - (2010-01-30)
  [2287] Learning to program in Ruby - examples of the programming basics - (2009-07-15)
  [2286] New to programming? It is natural (but needless) for you to be nervous - (2009-07-14)
  [1887] Ruby Programming Course - Saturday and Sunday - (2008-11-16)
  [1375] Python v Ruby - (2007-10-02)
  [1302] Ruby, Ruby, Ruby. Rails, Rails, Rails. - (2007-08-13)
  [1041] Learnt in London - Ruby, Martini, Coral and the Core - (2007-01-17)
  [1027] Cue the music, I'm happy. - (2007-01-09)
  [664] Ruby course - oops - it's not happening - (2006-04-01)
  [550] 2006 - Making business a pleasure - (2006-01-01)


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