On Sat, May 7, 2011 at 8:51 AM, Base <basselh...@gmail.com> wrote: > At the risk of sounding completely dense, I am having a hard time > understanding the purpose of the Identity function. As far as I can > tell all it does is return what is passed to it.
It's most useful when you have functions that take functions as arguments. For example, I have code that performs a SQL query and then runs a map-reduce transformation on that. Sometimes, however, I want just the original data so I can pass in identity (to map) and have it be a "no-op". Identity on its own isn't really useful - but in combination with higher-order functions, it can be very indispensible! -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ "Perfection is the enemy of the good." -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
