Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Thursday Code Puzzler: Playlist Shuffle Algorithm

DZone's Guide to

Thursday Code Puzzler: Playlist Shuffle Algorithm

· Java Zone
Free Resource

Learn how to stop testing everything every sprint and only test the code you’ve changed. Brought to you by Parasoft.

Thursday is code puzzler day here at DZone. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you find suitable.

Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer.  It's all about the participation!

Do you have code puzzlers that you'd like to share with the DZone community?  If so, please submit here. 

A Reliable Playlist Shuffle Algorithm

One thing I hate is when an implementation of shuffle on a media player results in a song repeating sooner than I would like, or earlier than it should. The challenge today is to write a method that takes a list of Song objects (with title, album and artist fields) and ensures that the space between a song repeating is as much as possible without having the same pattern used if the shuffle goes into a second (or third) run. 

Catch up on all our previous puzzlers here.

Get the top tips for Java developers and best practices to overcome common challenges. Brought to you by Parasoft.

Topics:

Opinions expressed by DZone contributors are their own.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}