From: Charles D Hixson <charleshixsn@...>
Date: 2007-09-20T01:31:42+09:00
Subject: Re: special Array method about Unix pathes

Une B�vue wrote:
> here is the goal:
>
> i've an Array of Unix pathes :
> forbidden = ["/Volumes/U3 System",
>              "/Volumes/EMTEC KEY/emtec_dl",
>              "/Volumes/EMTEC KEY/emtec_dl/Win98SE new driver.exe",
>              "/Volumes/EMTEC KEY/emtec_dl/v233r001"
>             ]
>
> i want to forbid access to those pathes BUT since, for example,
> "/Volumes/EMTEC KEY/emtec_dl/Win98SE new driver.exe" � belongs �
> to the path (it's below this path) "/Volumes/EMTEC KEY/emtec_dl"
> it is unusefull to have it in the Array.
>
> in the case above i'd like to return :
>
> forbidden = ["/Volumes/U3 System",
>              "/Volumes/EMTEC KEY/emtec_dl"
>             ]
>
> what i've done :
>
>
> class Array
>    def includePath?(path)
>      self.each { | x |
>        return true if path.startsWith?(x)
>      }
>      return false
>    end
>    def getContainers!
>      self.delete_if { | x | ( self - [ x ] ).includePath?( x ) }
>    end
> end
>
> class String
>   def startsWith?(dir)
>     self.index(dir) === 0
>   end
> end
>
> then forbidden.getContainers! gives me the expected result.
>
> what do you think about this solution ?
> could you propose a better one ?
>
> also, because english isn't my mother tongue, are my methods naming
> correct ?
>
>   
Array doesn't seem the proper class to have a includePath? method, 
otherwise the names look reasonable.  If the method is in Array, then a 
reasonable name might be includesStart?