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Feature #10131

Updated by nobu (Nobuyoshi Nakada) about 6 years ago

It happens too often to me that I want to calculate the greatest multiple of numeric r not greater than numeric x. This can be done by a simple operation below: 

 ~~~ruby 
 

     x, r = 3.7, 0.5 
 
     x.div(r).*(r) #=> 3.5 

 

     x, r = 41, 6 
 
     x.div(r).*(r) #=> 36 
 ~~~ 

 but I encounter this operation so often that I think it is an essential operation, and should be done as a single operation. Can any of the existing zero-ary operation be extended to take an optional argument to do this calculation? For example 

 ~~~ruby 
 

     3.7.floor(0.5) #=> 3.5 
 
     41.floor(6)      #=> 36 
 ~~~

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