Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what they have to do with Rails validations? Does validation occur after :before_save or :before_create ? ...

I know how to do 2 (I am going to use jstree to display it in the browser). 7 Answers ...

Currently , Twitter Bootstrap 3 have the following responsive breakpoints: 768px, 992px and 1200px, representing small, medium and large devices respectively. ...

Underscores seem fine. What about dashes? Other special characters? 5 Answers 5 ...

I have a string containing many words with at least one space between each two. How can I split the string into individual words so I can loop through them? ...

I have to include some images (company logo's etc) in email signatures. I've had all sorts of issues using the embedded images produced by the email system in question (they get sent as attachments generally) and as linked images (requiring permission to display them in the email received). ...

I always saw examples and cases where using a macro is better than using function. 11 Answers ...

Is it possible to center a background image in a div? I have tried just about everything - but no success: 9 Answers ...

I'm using the scrollTo jQuery plugin and would like to know if it is somehow possible to temporarily disable scrolling on the window element through Javascript? The reason I'd like to disable scrolling is that when you scroll while scrollTo is animating, it gets really ugly ;) ...

I have a select control, and in a javascript variable I have a text string. 21 Answers ...