CODEWITHSUNDEEP
ruby
Alan Coromano
Alan Coromano

Reputation: 26008

Change each item of string in Ruby

What I have

"path1/path2/path3"

what I want

"my_namespace:path1/my_namespace:path2/my_namespace:path3"

and I did:

a = "path1/path2/path3"
b = a.split("/").map{ |item| "my_namespace:"+ item}
puts b.join("/")

Of course, it works. But I'm curious if there is any other better way to do that.

Upvotes: 1

Views: 53

Answers (3)

Gregory Brown
Gregory Brown

Reputation: 1378

Seems like a good use case for String#gsub:

a = "path1/path2/path3".gsub(%r{[^/]+/?}) { |m| "mynamespace:#{m}" }
p a #=> "mynamespace:path1/mynamespace:path2/mynamespace:path3"

Upvotes: 1

sawa
sawa

Reputation: 168071

a.gsub(/(?<=^|\/)/, "my_namespace:")
# => "my_namespace:path1/my_namespace:path2/my_namespace:path3"

Upvotes: 2

megas
megas

Reputation: 21791

Maybe you meant different namespaces for your paths. If so then you can use zip

"path1/path2/path3".split('/').zip(['namespace1','namespace2','namespace3']).
  map { |p,n| n + ':' + p }.join('/')

=> "namespace1:path1/namespace2:path2/namespace3:path3"

Upvotes: 0

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