Ahhh - Thanks all. Most educational! This does make sense - I will try and deconstruct some of the examples where this is used to get a sense of when / why it is used. But this helps *tremendously*!!
Thanks!!! On May 7, 2:09 pm, Sean Corfield <seancorfi...@gmail.com> wrote: > 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
