Math object in Ruby

[Charles Agriesti]

In IRB, or saved as a program from Scite, put in something like:

puts(MATH:I)

response is always " Uninitialized constant MATH(NameError)

How can I tell if I have the MATH module in my installation? If I don't
have it, how do I fix that? Thanks in advance.

 

[Sam Duncan]

Capitalisation issue?

irb

ruby-1.9.2-p0 > puts Math:I
3.141592653589793
=> nil
ruby-1.9.2-p0 > puts MATH:I
NameError: uninitialized constant Object::MATH
from (irb):2
from /usr/home/sduncan/.rvm/rubies/ruby-1.9.2-p0/bin/irb:17:in `<main>'
ruby-1.9.2-p0 > defined?(Math)
=> "constant"
ruby-1.9.2-p0 > defined?(MATH)
=> nil


Sam

 

[Charles Agriesti]

Sam Duncan wrote in post #963414:

Capitalisation issue?
...
Sam

Doh! Thanks. Can't believe I did that.

 

[Josh Cheek]

[Note: parts of this message were removed to make it a legal post.]

In IRB, or saved as a program from Scite, put in something like:

puts(MATH:I)

response is always " Uninitialized constant MATH(NameError)

How can I tell if I have the MATH module in my installation? If I don't
have it, how do I fix that? Thanks in advance.

You could do something like this.

Object.constants.grep(/math/i) # => [:Math]