Re-learning the library

[Albert Schlef]

Hello.

After a long time I haven't touched Ruby I want to come back. I want to
refresh my memory about the various methods that come with the built-in
classes; e.g., String, Array, Hash. So I do, for example, "ri String"
and here's a problem: I get a long list of methods but some of them are
defined by some gem or 3rd party library. That's a problem, because I
want to see only the methods defined by Ruby itself. How do I do this?

 

[Robert Klemme]

After a long time I haven't touched Ruby I want to come back. I want to
refresh my memory about the various methods that come with the built-in
classes; e.g., String, Array, Hash. So I do, for example, "ri String"
and here's a problem: I get a long list of methods but some of them are
defined by some gem or 3rd party library. That's a problem, because I
want to see only the methods defined by Ruby itself. How do I do this?

Create a clean installation without any gems?

Cheers

robert

 

[Walton Hoops]

Hello.

After a long time I haven't touched Ruby I want to come back. I want to
refresh my memory about the various methods that come with the built-in
classes; e.g., String, Array, Hash. So I do, for example, "ri String"
and here's a problem: I get a long list of methods but some of them are
defined by some gem or 3rd party library. That's a problem, because I
want to see only the methods defined by Ruby itself. How do I do this?

I'd recommend browsing http://rdoc.info/stdlib

 

[jtprince]

After a long time I haven't touched Ruby I want to come back. I want to

refresh my memory about the various methods that come with the built-in
classes; e.g., String, Array, Hash. So I do, for example, "ri String"
and here's a problem: I get a long list of methods but some of them are
defined by some gem or 3rd party library. That's a problem, because I
want to see only the methods defined by Ruby itself. How do I do this?

ri --no-gems Enumerable#collect
ri --help # for controls (--no-system --no-site --no-home etc.)

 

[J. K.]

i use a short program for methods...

####

info = String #(or whatever)
puts "Methods:"
puts info.methods.sort
puts
puts "Instance Methods:"
puts info.instance_methods.sort

####

if you don't require anything, this should only give you the ruby
methods....

- j

 

[Brian Candler]

J. K. wrote in post #983090:

i use a short program for methods...

####

info = String #(or whatever)
puts "Methods:"
puts info.methods.sort
puts
puts "Instance Methods:"
puts info.instance_methods.sort

####

if you don't require anything, this should only give you the ruby
methods....

Or a quick one in irb: