/examples/string-sub-gsub.rb

http://github.com/runpaint/read-ruby · Ruby · 12 lines · 9 code · 0 blank · 3 comment · 0 complexity · f2c29b738c0f6d1bcb7fa365b1e74870 MD5 · raw file 

    

  1. alphabet = [*?a..?f].join
    2. 

  2. alphabet.sub(/U/, 'you?') #=> "abcdef"
    3. 

  3. alphabet.gsub(/[b-e]/){|match| "<U+#{'%.4X' % match.ord}>"}
    4. 

  4. #=> "a<U+0062><U+0063><U+0064><U+0065>f"
    5. 

  5. alphabet.sub!(?V, 'for Vendetta') #=> nil
    6. 

  6. '3 + -4'.sub(/(?<a>\d+) \+ -(?<b>\d+)/, 
    7. 

  7.              "== \\k<a> - \\k<b>") 
    8. 

  8. #=> "== 3 - 4"
    9. 

  9. subs = {?& => '&amp;', ?> => '&gt;'}
    10. 

  10. subs.default = '?'
    11. 

  11. 'You & I > he & they!'.gsub(/[[:punct:]]/, subs)
    12. 

  12. #=> "You &amp; I &gt; he &amp; they?"
    13.