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Editorial Team
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Asked: 2026-06-06T04:49:08+00:00

I really can’t understand how the below piece of code is working… options.each {

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I really can’t understand how the below piece of code is working…

options.each { |p|  
  if p[0] == '-'[0]  
    break  
  end...

does it really check for this string? “-[0]”?? or am i missing something?
sorry for this dumb question, but my mind is blocked right now…

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1 Answer

  1. Editorial Team

    What '-'[0] will give you in Ruby 1.8 or lower is 45, which is the ASCII value for the - character. So what this is doing is checking to see if p[0] is equal to 45.

    In Ruby 1.9, '-'[0] will give you '-', so it is recommended to use String#ord instead if you want the ASCII value:

    if p[0] == '-'.ord
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