collimarco - Developer IT

Connect to localhost from Guest running on VirtualBox

- by collimarco

I have a Rails app running on Mac at http://localhost:3000 and I would like to access it from Windows 7, which is a guest OS running on VirtualBox. Can you explain me how to do that? Thanks!

Simple cropping with Paperclip

I would like to crop images on upload using Paperclip to get square thumbs from the center of the original picture. I find out a method in documentation that seems to do exactly what I want: transformation_to(dst, crop = false) The problem is that I can't figure out where to use this method. It would be great to simply pass something as a parameter here: has_attached_file :picture, :styles = { :medium = "600x600", :thumb = "something here" }

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How to Make Canvas Text Selectable?

- by collimarco

Any suggestion is highly appreciated.

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Hide Adsense on localhost

- by collimarco

I have a site built in Ruby On Rails which has many ads in different templates and views. It is hard to actualy remove each ad between tests and deployments. I don't know whether Google approves many impressions (even if without clicks) on localhost. How do you deal with this issue? Maybe it is a good solution to set a variable/constant available everywere to enable/disable ads easily. Do you think it is a good solution? If so, how do I declare a global variable for views?

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How to create a label inside an <input> element?

- by collimarco

Hi! I would like to insert a descriptive text inside an input element that disappers when the user click on it. Example I know it is a very common trick, but I do not know how to do that.. What is the simplest/better solution?

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What does ||= mean in Ruby?

- by collimarco

Can you explain me its meaning or give the link to the API page (which I couldn't find)?

Developer IT