Comments on: Ruby’s Redundant Exclamation Marks

By: Danny

Danny — Mon, 23 Jan 2006 21:24:56 +0000

Thanks, Assaf. Remco explained the same thing to me today. I guess destructive methods are more than just redundant versions of their non-destructive variants.

By: assaf

assaf — Mon, 23 Jan 2006 20:00:57 +0000

if your destructive method is very efficient at manipulating the object, you’ll use that first and base the non-destructive method on that. for example:

def gsub(pattern, replace)
str = dup
str.gsub!(pattern, replace)
str
end

if you think beyond strings, and to more generic objects, you can easily create non-destructive methods from destructive methods, by implementing dup. the other way around, you need to implement dup and replace.

By: Danny’s Blog » Blog Archive » Ruby’s Exclamations: A Dream Come True

Mon, 23 Jan 2006 08:10:02 +0000

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