BEGIN:VCALENDAR PRODID;X-RICAL-TZSOURCE=TZINFO:-//Calagator//EN CALSCALE:GREGORIAN X-WR-CALNAME:Calagator METHOD:PUBLISH VERSION:2.0 BEGIN:VTIMEZONE TZID;X-RICAL-TZSOURCE=TZINFO:America/Los_Angeles BEGIN:STANDARD DTSTART:20131103T020000 RDATE:20131103T020000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST END:STANDARD END:VTIMEZONE BEGIN:VEVENT CREATED;VALUE=DATE-TIME:20140218T180502Z DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20140220T190000 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20140220T173000 DTSTAMP;VALUE=DATE-TIME:20140218T180502Z LAST-MODIFIED;VALUE=DATE-TIME:20140218T180502Z UID:http://calagator.org/events/1250465702 DESCRIPTION: \;\n \;\nKevin sez: \;\n \;\nThe domain problem is conceptually simple: you provide sets of images and are notified with visual diffs of changes. The motivating use case was regression testing a web data visualization product---taking screenshots is far easier and more comprehensive than unit testing JavaScript + DOM + CSS styling. 3\;\n \;\nThe application is about 1300 lines of code\, which include s all of the (Clojure-generated) markup and styling.It's built with Cloj ure\, ClojureScript\, and Datomic. \;\nI'll touch on: \;\n \;\n \;\n+ designing an application around Stuart Sierra's "\;Reloade d"\; workflow: http://thinkrelevance.com/blog/2013/06/04/clojure-wor kflow-reloaded \;\n \;\n+ basics (and not-so-basics) of the Ring H TTP model \;\n \;\n+ using Chas Emerick's Friend library to handle web user and API authentication \;\n \;\n+ deploying/monitoring a Clojure application in (low-stakes) production \;\n \;\n+ structu ring an application around protocols so that service backends (e.g.\, S3 ) can be easily swapped between development\, staging\, and production&# 13\;\n \;\nIf there's anything that seems particularly interesting to you (in the above list or otherwise)\, please reply to this thread so I can prepare a bit of material. \;\n \;\nI'm planning on giving a 20 minute high-level overview of the application\, and then opening it u p to questions and focussing on whatever topics folks are interested in. \;\n\n\nTags: clojure\, ClojureScript\, datomic\n\nImported from: ht tp://calagator.org/events/1250465702 URL:http://www.meetup.com/clojerks/events/161111042/ SUMMARY:Kevin Lynagh: Walkthrough of a Clojure+Clojurescri­pt+Datomic Ima ge Diffing Application LOCATION:Puppet: 308 SW 2nd Ave Fifth Floor\, Portland OR 97204 US SEQUENCE:1 END:VEVENT END:VCALENDAR