The next meeting of the Bay Area Haskell Group will be held on Thursday 18 October 2012 at Google's San Francisco office. The speaker is Edward Kmett and his talk title is Lenses, Folds and Traversals.
Google will provide sandwiches, soft drinks and coffee at the start of the meeting. Please strive to arrive between 6PM and 6:30PM. Please let me (Satnam Singh, firstname.lastname@example.org) know if you plan to attend so we can provide enough food (please tell me your full name and optionally affiliation). When you arrive please check in at reception and then take an elevator to the fourth floor. I or some other Googler will issue you with a badge and escort you to the meeting room which is on the third floor: SFO-SPE-3-Flower Drum Song Tech. Please call my cell if you have any difficulties: 408 656 4590. I will add the name of attendees to this page by default (please let me know if you prefer to not have your name disclosed).
The address of Google's San Francisco office is: 345 Spear Street, 4th Floor, San Francisco, CA 94105. You can reach the office by tram, bus, BART or by CalTrain from the South Bay. There are several parking lots in the area and some street parking. Here is a map showing the location of the Google San Francisco office:
You can subscribe to the Bay Area Haskell group for information about future events.
Here is some additional background material.
Edward's old lens talks
Also there is "Applicative Programming with Effects" which introduced the Traversable class.
Another useful reference is Jeremy Gibbons' "The Essence of the Iterator Pattern":