why "::", not "."

[Oleg Igor]

Why does the method of modules use a dot, and the constants a double
colon?
e.g.
Math:I and Math.cos

 

[Ryan Davis]

Why does the method of modules use a dot, and the constants a double
colon?
e.g.
Math:I and Math.cos

For the same reason why inner-classes/modules use double colon, because =
they're constants and that's how you look up via constant namespace.

Math:I and ActiveRecord::Base are the same type of lookup... it is =
just that Base is a module and PI is a float.

You can also use double-colon for invocation:

% ruby -e 'p Math::exp(1)'
2.71828182845905

but that is frowned upon as non-idiomatic ruby.

 

[Rick DeNatale]

You can also use double-colon for invocation:

% ruby -e 'p Math::exp(1)'
2.71828182845905

but that is frowned upon as non-idiomatic ruby.

Not so much non-idiomatic as archaic.

Kind of like using thee and thou, or goeth (as in "Pride goeth before
the fall") in modern English. <G>


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Rick DeNatale

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