Programming Design Patterns define recommended approaches of solving common application problems. Within design patterns is a subset of design patterns called Idioms.
Idioms you can think of as a strategy for expressing recurring constructs or if you will sub-problems and often take advantage of the special features of a language.
They tend to be specific to a programming language and can not be reused
in other languages they were not specifically designed for. To demonstrate the differences lets compare two design patterns we commonly use.
In our April Issue An Almost Idiot's Guide to PostgreSQL YUM
we covered using the new PostgreSQL Yum repository to install the PostgreSQL 8.3.1 release on Fedora, RedHat Enterprise, and CentOS. We also received numerous useful feedback from others on issues they
ran into and how they overcame them. The blog comments are definitely worth a read.