In Ruby-on-Rails, there is a handy one-liner that will allow you to find all the instances of one model that contain no instances of an associated model.

For example, lets say you have a model Blog that has a has_many relationship with Comments, and you come across a scenario where you want ...

This post will walk you through the steps of copying an S3 bucket from one Amazon Web Services account to another. Throughout this post, the destination account refers to the account that will be receiving the bucket's contents, and the source account refers to the account that will be transmitti...