What’s Up With All These Changes in Rails?

Re:What’s Up With All These Changes in Rails? by wedesoft on Wednesday June 15, 2011 @07:39AM (#2656656)

The Ruby program takes more time because it is not optimised and it also checks for numeric overflow. The following Ruby program

    puts (1 .. 21).inject :*

will output "51090942171709440000". And

    puts (1 .. 21).inject(:*).class

will output "Bignum" because Ruby switches to big numbers when its integer representation is exceeded.

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Re:What’s Up With All These Changes in Rails? by ssmoot on Wednesday June 15, 2011 @11:36AM (#2657507)

You make a valid point, but I think it's missing the forest. The example I posted actually results in a Fixnum. It's addition, not multiplication.

Simple math operations are an admittedly terrible way to demonstrate the point I was trying to make (method dispatch and object instantiation overhead). Dismiss it, accept it, or dig deeper verify it. :-)

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