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inexpensive web hosting and free domain registration Class methods are defined by placing the class name and a period in front of the method name. class Example def instMeth # instance method end def Example.classMeth # class method end end Jukeboxes charge money for each song played, not by the minute. That makes short songs more profitable than long ones. We may want to prevent songs that take too long from being available on the SongList.
inexpensive web hosting and free domain registration We could define a class method in SongList that checked to see if a particular song exceeded the limit. We'll set this limit using a class constant, which is simply a constant (remember constants? they start with an uppercase letter) that is initialized in the class body. class SongList MaxTime = 5*60 # 5 minutes def SongList.isTooLong(aSong) return aSong.duration > MaxTime end end song1 = Song.
inexpensive web hosting and free domain registration new("Bicylops", "Fleck", 260) SongList.isTooLong(song1) » false song2 = Song.new("The Calling", "Santana", 468) SongList.isTooLong(song2) » true Singletons and Other Constructors Sometimes you want to override the default way in which Ruby creates objects. As an example, let's look at our jukebox.
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