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Editorial Team
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Asked: 2026-05-27T10:01:46+00:00

In irb: (2**3).class #=> Fixnum (2**3).to_r.class #=> Rational In Textmate: (2**3).class #=> Fixnum (2**3).to_r.class

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In irb:

(2**3).class #=> Fixnum
(2**3).to_r.class #=> Rational

In Textmate:

(2**3).class #=> Fixnum
(2**3).to_r.class #=> undefined method 'to_r' for 8:Fixnum

Why?

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1 Answer

  1. Editorial Team

    Textmate and irb are using different versions of Ruby. to_r was introduced in 1.9. See:

    1.9.2 (main):0 > 1.to_r
=> (1/1)

1.8.7 (main):0 > 1.to_r
NoMethodError: undefined method `to_r' for 1:Fixnum
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