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Editorial Team
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Editorial Team
Asked: May 12, 20262026-05-12T06:27:22+00:00 2026-05-12T06:27:22+00:00

How do I best navigate the core docs? What are others doing when curious

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How do I best navigate the core docs? What are others doing when curious about what methods are available on standard classes?

This other SO question is the same, but the accepted answer isn’t cutting it for me.

I was trying

f = File.open("some-file.txt","w+")

and then wanted to check what methods I have available on f after this. I tried the following:

ri File.open -> Nothing known about File.open

The core docs tells that File at least doesn’t define “open”. But the page doesn’t mention which modules File mixes in, or inherits from. So I wrote a script:

p File.open("foo.txt", "w+").methods

But this seems quite inefficient (not to mention a raw list of methods isn’t the best documentation).

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  1. Editorial Team
    Editorial Team
    2026-05-12T06:27:22+00:00Added an answer on May 12, 2026 at 6:27 am

    I used pickaxe. It wasn’t the be all and end all, but it was pretty decent.

    Now I guess it would have to be http://ruby-doc.org

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