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Yeah, It doesn't allow two identical routes. We need to document it in a more explicit way

from kemalcr.com.

Hello, apologies for late reply...

Radix won't allow two identical routes, and those with overlap, the more specific tends to win... I think?

That's actually not accurate. Radix will not allow two equal routes but will allow adding a payload to a shorter one, example:

require "radix"

tree = Radix::Tree(Symbol).new

# this works
tree.add "/foo/bar/baz", :baz
tree.add "/foo/bar", :bar

# not found (no payload at `/foo`)
result = tree.find "/foo"
pp result.found? # => false

result = tree.find "/foo/bar/baz"
pp result.found?  # => true
pp result.payload # => :baz

result = tree.find "/foo/bar"
pp result.found?  # => true
pp result.payload # => :bar

Attempt to add any payload with the same path will result in Radix::Tree::DuplicateError exception.

Hope that helps.

Cheers.

from kemalcr.com.