Add method to system type : String class Extension « String « Ruby

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Ruby » String » String class Extension   Add method to system type class String   def substitute(binding=TOPLEVEL_BINDING)     eval(%{"#{self}"}, binding)   end end template = %q{static string #{food}!} food = 'b' template.substitute(binding)          food = 'p' template.substitute(binding)      Related examples in the same category 1.  write an extension to the String class to provide it 2.  Processing a String One Word at a Time by adding a method to string class 3.  Replacing Multiple Patterns in a Single Pass 4.  Writing an Inherited Class 5.  Override the method from String Class 6.  Regular expression based comparison 7.  String translation 8.  convert string to binary number 9.  Removes first character from self and returns it, changing self 10.  Adds last character of provided string to front of self 11.  Pops last character off self and returns it, changing self 12.  Pushes first character of provided string onto end of self 13.  Rotate left 14.  Rotate right 15.  Shifts first word off of self and returns; changes self 16.  Adds provided string to front of self 17.  Pops and returns last word off self; changes self 18.  Pushes provided string onto end of self 19.  Get acronym

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