Ruby match first occurrence of string for a gsub replacement

Question

I have a string let's say http://someUrul.com/someController/SOmeAction?SomeQS=http://someOtherUrl

and I want to replace the first http with https, but not the second, so I end up with https://someUrul.com/someController/SOmeAction?SomeQS=http://someOtherUrl

How can I accomplish this with a simple gsub? The following replaces both.

request.url.gsub(/http:/, "https:")

Solution

Use sub, not gsub. gsub is global, sub isn't.

Comments

[ar3]

Thank you! I'm...just getting started with RoR, and the language/framework is still a little uncomfortable...I'm a C#/JS guy.

[HRÓÐÓLFR]

At least you've seen the light :D