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<!DOCTYPE html>










<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <!-- Google Optimize Anti-flicker snippet (recommended)  -->
        <style>.async-hide { opacity: 0 !important} </style>
        <style>.promo{background:#222528;position:fixed;z-index:1001!important;left:0;top:0;right:0;max-height:48px;min-height:48px;padding-top:0!important;padding-bottom:0!important}.promo,.promo p{-webkit-box-align:center;-ms-flex-align:center;align-items:center}.promo p{font-size:.8125rem;line-height:1rem;color:#fff;margin-bottom:0;margin-top:0;margin:0 auto;display:-webkit-box;display:-ms-flexbox;display:flex;font-weight:700}@media only screen and (max-width:650px){.promo p{font-size:.6875rem}}.promo span{overflow:hidden;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}.promo a{color:#fff!important;text-decoration:underline!important}.promo a.btn{background:#d0021b;padding:7px 20px;text-decoration:none!important;font-weight:700;margin-left:10px;margin-right:10px;white-space:nowrap;border-radius:5px}@media only screen and (max-width:650px){.promo a.btn{font-size:.6875rem;padding:7px 10px}}.promo.container{padding-top:8px;padding-bottom:8px}@media only screen and (min-width:1050px){.promo.container{padding-top:0;padding-bottom:0}}.promo .actions{-ms-flex-wrap:nowrap;flex-wrap:nowrap}.promo .actions__left{-ms-flex-preferred-size:100%;flex-basis:100%;-webkit-box-align:center;-ms-flex-align:center;align-items:center}.promo .actions__right{-ms-flex-preferred-size:40px;flex-basis:40px;margin-top:0;margin-bottom:0;-webkit-box-pack:end;-ms-flex-pack:end;justify-content:flex-end}.promo.hidden{display:none}.promo.show{display:-webkit-box!important;display:-ms-flexbox!important;display:flex!important}.promo.show .container__inner{-webkit-box-flex:1;-ms-flex:1;flex:1}.promo.fixed{position:fixed}.promo.show+header.header{margin-top:48px}.header{background:#fff;-webkit-box-shadow:0 1px 0 #dde2e5;box-shadow:0 1px 0 #dde2e5}.header .actions__left,.header__bottom__events{max-width:100%!important;margin:0}.header .header__events-all{margin:0;display:-webkit-box;display:-ms-flexbox;display:flex;position:relative}.header .header__events-all .header__event-slot{-webkit-box-flex:1;-ms-flex:1 100%;flex:1 100%;border-right:1px solid #dde2e5;margin-top:3px;margin-bottom:3px;padding-left:15px;text-align:left;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-right:5px;min-width:300px}.header .header__events-all .header__event-slot:hover{text-decoration:none!important}.header .header__events-all .header__event-slot img{min-width:40px;height:40px}.header .header__events-all .header__event-slot div{margin-left:10px}.header .header__events-all .header__event-slot span{font-weight:700!important;font-size:.75rem;margin-bottom:0!important;margin-top:0;display:block;line-height:1.125rem;text-align:left}.header .header__events-all .header__event-slot p{font-weight:400;font-size:.625rem;line-height:130%!important;color:#495057!important;margin:0}@media only screen and (min-width:1050px){.header .header__events-all .header__event-slot p{font-size:.625rem}}.header .header__events-all .header__event-slot:first-child{padding-left:0}.header .header__events-all .header__event-slot:last-child{padding-right:0;border-right:0}@media only screen and (min-width:1050px){.header__bottom,.header__middle,.header__top{position:relative;white-space:nowrap}}.header__top{padding:10px 0}@media only screen and (min-width:800px){.header__top{padding:5px 0}}.header__bottom{padding:5px 0;z-index:29;max-width:100%}.header__bottom a{font-size:.8125rem}.header__bottom .trending{margin-left:0;margin-right:0}.header__bottom .actions{-webkit-box-align:start;-ms-flex-align:start;align-items:flex-start}.header__bottom .actions__left{max-width:calc(100% + 8px)}@media only screen and (min-width:800px){.header__bottom .actions__left{max-width:calc(100% + 24px)}}.header__bottom .actions__right{-webkit-box-flex:1;-ms-flex:1 1 auto;flex:1 1 auto;display:none}@media only screen and (min-width:1050px){.header__bottom .actions__right{display:-webkit-box;display:-ms-flexbox;display:flex}}.header__middle{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:horizontal;-webkit-box-direction:normal;-ms-flex-flow:row wrap;flex-flow:row wrap}@media only screen and (min-width:1050px){.header__middle{-ms-flex-wrap:nowrap;flex-wrap:nowrap}}.header__top .actions__left{-webkit-box-align:center;-ms-flex-align:center;align-items:center;-ms-flex-line-pack:center;align-content:center}@media only screen and (min-width:1050px){.header__top .actions__right{max-width:430px}}.no-style.header__nav li:nth-child(3){font-weight:700}.no-style.header__nav li:nth-child(3) a{color:#0e5ef1!important}.header__bottom__events::after{background:-webkit-gradient(linear,left top,right top,color-stop(0,rgba(255,255,255,0)),to(#fff));background:linear-gradient(90deg,rgba(255,255,255,0) 0,#fff 100%);content:'';position:absolute;height:60px;right:10px;width:25px}@media only screen and (min-width:1050px){.header__bottom__events::after{display:none}}.contribute-link{font-weight:400;font-size:.6875rem;color:#000!important;position:relative;padding-left:10px}.contribute-link:hover{color:#00791d!important;text-decoration:none!important}.contribute-link::before{content:'';width:1px;height:12px;position:absolute;top:50%;-webkit-transform:translateY(-50%);transform:translateY(-50%);background:rgba(0,0,0,.1);left:-1px}.my-0{margin-top:0!important;margin-bottom:0!important}.header__desc.my-0{margin-left:0}.header__bottom__events .actions__left{max-width:100%!important;overflow-x:scroll;-ms-overflow-style:none;scrollbar-width:none;display:block;scroll-behavior:smooth;min-width:100%}.header__bottom__events .actions__left::-webkit-scrollbar{display:none}.header__bottom__events .actions__left:-webkit-scrollbar-thumb{background:#fff}.logo{line-height:1rem}.header{position:relative;z-index:41;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.header .input:focus,.header input[type=password]:focus,.header input[type=text]:focus{border:1px solid #00791d}.header a:not(.button):not(.login__action):not(.active){text-decoration:none;color:#222}.header a:not(.button):not(.login__action):not(.active):hover{text-decoration:underline;color:#222}.header__items{display:none;-ms-flex-wrap:wrap;flex-wrap:wrap}@media only screen and (min-width:1050px){.header__items{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:horizontal;-webkit-box-direction:normal;-ms-flex-direction:row;flex-direction:row}.header__items nav{position:relative;background:0 0;padding:0;left:0;top:0;line-height:inherit;display:block;-webkit-box-shadow:none;box-shadow:none;max-width:100%;max-height:80px}}.header__items>div{width:100%;margin-bottom:32px;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-flow:column nowrap;flex-flow:column nowrap}@media only screen and (min-width:552px){.header__items>div:not(:nth-last-child(-n+2)){margin-bottom:32px}}@media only screen and (min-width:552px) and (max-width:1050px){.header__items>div{-webkit-box-flex:0;-ms-flex-positive:0;flex-grow:0;-ms-flex-negative:0;flex-shrink:0;-ms-flex-preferred-size:calc(99.7% * 1/2 - (32px - 32px * 1/2));flex-basis:calc(99.7% * 1/2 - (32px - 32px * 1/2));max-width:calc(99.7% * 1/2 - (32px - 32px * 1/2));width:calc(99.7% * 1/2 - (32px - 32px * 1/2))}.header__items>div:nth-child(1n){margin-right:32px;margin-left:0}.header__items>div:last-child{margin-right:0}.header__items>div:nth-child(2n){margin-right:0;margin-left:auto}}@media only screen and (min-width:800px) and (max-width:1050px){.header__items>div{-webkit-box-flex:0;-ms-flex-positive:0;flex-grow:0;-ms-flex-negative:0;flex-shrink:0;-ms-flex-preferred-size:calc(99.7% * 1/4 - (32px - 32px * 1/4));flex-basis:calc(99.7% * 1/4 - (32px - 32px * 1/4));max-width:calc(99.7% * 1/4 - (32px - 32px * 1/4));width:calc(99.7% * 1/4 - (32px - 32px * 1/4))}.header__items>div:nth-child(1n){margin-right:32px;margin-left:0}.header__items>div:last-child{margin-right:0}.header__items>div:nth-child(4n){margin-right:0;margin-left:auto}}@media only screen and (min-width:1050px){.header__items>div{margin-bottom:0!important;margin-right:0!important;-webkit-box-orient:horizontal;-webkit-box-direction:normal;-ms-flex-direction:row;flex-direction:row}}.header__items .language__switcher{display:none}.header__items .language__switcher .li-nav.active>a,.header__items .language__switcher>li.active>a{color:#fff!important}.header__items .language__switcher .li-nav.active>a:hover,.header__items .language__switcher>li.active>a:hover{color:#fff!important;background:#0e5ef1}.header__items .language__switcher .li-nav:hover>a,.header__items .language__switcher>li:hover>a{color:#fff}.header+main{display:block;min-height:210px;-webkit-transition:margin .15s ease;transition:margin .15s ease;margin-top:0!important}.header--hide .header+main{margin-top:50px}.header--hide .header__toggle{opacity:0;top:20px;visibility:hidden}.header--hide .header__logo{max-height:0}.header--hide .header__middle,.header--hide .header__top{max-height:0;overflow:hidden;padding-top:0;padding-bottom:0;border-color:transparent}.header--hide .header__bottom .vue-portal-target{top:3px;right:0;bottom:auto;left:auto;position:absolute}.header__middle,.header__top{-webkit-transition:all .15s ease;transition:all .15s ease}.header__middle{border-bottom:1px solid rgba(0,0,0,.1);z-index:33}.header__middle .vue-portal-target{width:100%}@media only screen and (min-width:1050px){.header__middle .vue-portal-target{display:none}}@media only screen and (min-width:1050px){.header__middle{line-height:5.75rem;text-align:left;padding:0;z-index:30}.header__middle .widget__heading{display:none}}.header__top>.actions__left{display:none}@media only screen and (min-width:1050px){.header__top>.actions__left{display:-webkit-box;display:-ms-flexbox;display:flex}}.header__top>.actions__right{-webkit-box-flex:1;-ms-flex-positive:1;flex-grow:1;margin-right:0;margin-top:0;margin-bottom:0;-webkit-box-pack:end;-ms-flex-pack:end;justify-content:flex-end}.header__top>.actions__right .dropdown__holder{width:calc(100vw - 16px);max-height:80vh}@media only screen and (min-width:600px){.header__top>.actions__right .dropdown__holder{width:auto}}.header__top>.actions__right>*{margin:0}.header__top>.actions__right .search{display:none}@media only screen and (min-width:1050px){.header__top>.actions__right>*{display:-webkit-box;display:-ms-flexbox;display:flex;white-space:nowrap}.header__top>.actions__right .search{display:block}}.header__top .user__login{display:block}.header__top .user__login>.button,.header__top .user__login>button{border-top-right-radius:0;border-bottom-right-radius:0}@media only screen and (min-width:1050px){.header__top{position:relative;right:auto;width:100%}}.header__logo{max-width:165px;position:absolute;top:8px;overflow:hidden;-webkit-transition:all .1s ease;transition:all .1s ease;z-index:32;line-height:2.25rem;height:36px;width:100px;margin-left:50px;-ms-flex-preferred-size:190px;flex-basis:190px}@media only screen and (min-width:800px){.header__logo{top:4px}}@media only screen and (min-width:1050px){.header__logo{position:relative;top:0;overflow:visible;margin-right:20px;margin-left:0;line-height:3.125rem;height:50px}.header__logo>*{width:165px}}@media only screen and (min-width:1280px){.header__logo{margin-right:30px}}.header__desc,.header__more>button{text-transform:capitalize;color:#666;letter-spacing:0;font-size:0;font-weight:400;line-height:1.5rem;vertical-align:top;font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI Variable","Segoe UI",system-ui,ui-sans-serif,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";-webkit-transition:font-size .15s ease-in-out;transition:font-size .15s ease-in-out}@media only screen and (min-width:1050px){.header__desc,.header__more>button{font-size:.6875rem}}.header__desc{display:-webkit-inline-box;display:-ms-inline-flexbox;display:inline-flex;position:relative;width:auto}.header__topics{white-space:nowrap;float:right;position:relative}.header__topics *{display:inline-block;vertical-align:top}.header__topics a{font-size:.8125rem}@media only screen and (min-width:1050px){.header__topics{float:none}}.header__more{display:-webkit-inline-box;display:-ms-inline-flexbox;display:inline-flex;vertical-align:top}.header__more:before{left:-12px}.header__more:after,.header__more:before{content:'';width:1px;height:12px;position:absolute;top:50%;-webkit-transform:translateY(-50%);transform:translateY(-50%);background:rgba(0,0,0,.1)}.header__more:after{right:-12px}.header__more:hover{cursor:pointer;color:rgba(0,0,0,.75)}.header__user{display:inline-block;vertical-align:top;white-space:nowrap;margin-left:8px}@media only screen and (min-width:1050px){.header__user{margin-left:0}}.header__user>div{display:inline-block;vertical-align:top}.header__user-nav a:not(.button){text-transform:uppercase;font-size:.75rem;font-weight:600}.header__user-nav a:not(.button):not(.active){opacity:.5}.header__user-nav a:not(.button):not(.active):hover{opacity:.75}.header__user-nav a:not(.button):hover{text-decoration:none}.header__user-nav a:not(.button).active{color:#222;cursor:default;text-decoration:none}.header__user-nav a:not(.button):before{margin-right:0}.header__user-nav a:not(.button):not(:last-child){margin-right:16px}@media only screen and (min-width:1050px){.header__user-nav a:not(.button):not(:last-child){margin-right:32px}}@media only screen and (min-width:1050px){.header__user-nav+.header__topics{margin-left:56px}}.header__search{display:none;vertical-align:top;margin-right:0}@media only screen and (min-width:1050px){.header__search{display:inline-block}}.header__search,.header__user{line-height:inherit}.header__nav{border-bottom:1px solid rgba(0,0,0,.1)}@media only screen and (min-width:800px){.header__nav{border-bottom:0}}.header__nav .button{margin-left:0}.header__nav .button__more{margin-right:20px}.header__nav .li-nav,.header__nav>li{-webkit-transition:all .15s ease;transition:all .15s ease}@media only screen and (min-width:1050px){.header__nav .li-nav,.header__nav>li{display:-webkit-inline-box;display:-ms-inline-flexbox;display:inline-flex;vertical-align:middle;position:static;border:none;min-height:65px}.header__nav .li-nav:hover.has--subnav .nav .li-nav,.header__nav .li-nav:hover.has--subnav .nav>li,.header__nav>li:hover.has--subnav .nav .li-nav,.header__nav>li:hover.has--subnav .nav>li{white-space:normal}.header__nav .li-nav:hover.has--subnav .nav__subnav,.header__nav>li:hover.has--subnav .nav__subnav{opacity:1;top:100%;visibility:visible;-webkit-transition-delay:.25s;transition-delay:.25s}.header__nav .li-nav:hover.has--subnav .nav__category,.header__nav>li:hover.has--subnav .nav__category{width:100%}.header__nav .li-nav:hover.has--subnav .nav__category:after,.header__nav .li-nav:hover.has--subnav .nav__category:before,.header__nav>li:hover.has--subnav .nav__category:after,.header__nav>li:hover.has--subnav .nav__category:before{-webkit-transition-delay:.25s;transition-delay:.25s;opacity:1}}@media only screen and (min-width:1080px){.header__nav .li-nav:not(:last-child),.header__nav>li:not(:last-child){margin-right:23px;margin-left:23px}}@media only screen and (min-width:1280px){.header__nav .li-nav:not(:last-child),.header__nav>li:not(:last-child){margin-right:23px;margin-left:23px}}@media only screen and (min-width:1338px){.header__nav .li-nav:not(:last-child),.header__nav>li:not(:last-child){margin-right:23px;margin-left:23px}}.header__nav .li-nav>a,.header__nav>li>a{font-size:.875rem;line-height:1.5rem;padding:12px 0;color:#000;display:inline-block;max-width:100%;position:relative;z-index:61;white-space:normal}@media only screen and (min-width:1050px){.header__nav .li-nav>a,.header__nav>li>a{padding:8px 0 0;font-weight:700}}.header__nav .li-nav>a:after,.header__nav 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                    <h1>FRP in ClojureScript with Javelin</h1>

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                            <div class="actions__right"><span>39:08</span></div>
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                        <p>Alan Dipert introduces Javelin, a ClojureScript library, demonstrating how it can be used to express a variety of asynchronous workflows in concise and composable ways.</p>
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                        <p>Alan Dipert has contributed to Clojure, ClojureScript, and several Clojure projects including Leiningen and clojure-tco. Alan is a developer at The Fresh Diet, where he builds systems for delivering fresh food to customers across North America. He lives in Durham, North Carolina, where he helps run Splat Space, the local hacker space.</p>
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                        <p>Clojure/West is the newest conference creation from Alex Miller (aka @puredanger).  Alex has been running the Strange Loop conference in St. Louis since 2009, smashing together the worlds of functional and dynamic programming languages, concurrency, distributed systems, web and mobile.  Since early 2010, Alex has also been part of a team using Clojure at Revelytix.</p>
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                        <p class="date">Jul 16, 2013</p>
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