Question

I’m playing with a simple “breadcrumb” nav in Rails and I want to split my current path into a series of strings. Yes I know there are libraries for this, but I am interested in how you would pull the following task off in pure Ruby.

Let’s say you have a url path string like this:

/users/admins/1/edit

And you want to return an array of strings like this:

["/users","/users/admins","users/admins/1","users/admins/1/edit"]

How would you go about doing so? I’ve tried to use the each_index functions to add each subsequent portion together and shove it in a new array, but I can never get a true recursive addition of the strings.

Any ideas?

Answer 1

str = "/users/admins/1/edit"
str.split('/').drop(1).reduce([]){|res,s| res << res.last.to_s+'/'+s}
#=> ["/users", "/users/admins", "/users/admins/1", "/users/admins/1/edit"]

Second variant inspired by pguardiario

str.scan(/\/\w*/).reduce([]){|res,s| res << res.last.to_s + s}