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Ben Lesh

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Thinking About Your Code: Push vs PulldotJS 20242024-06-27
Code is cast as producers and consumers and categorized into a four-way chart: push vs pull primitives are functions and iterables (pull)…
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Tug of War – Pushing and Pulling In JavaScriptrevo.js 20232023-10-04
Argues that almost every line of JavaScript is either a push or a pull and demonstrates with an M&M demo why pull is synchronous and push can cause back…
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Async Programming in JavaScript SucksRenderATL 20222022-06-01
You’re not going to want to miss what Ben had to say at Render 2022. Let’s explore why async is hard, and talk about some solutions in React. Don’t miss what…
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Future of RxJSJSWorld Conference USA 20212021-05-21
Version 7 shrinks the library dramatically — it lands at 53% of v6 size after piecemeal refactors and typings overhaul — and tightens types but now requires…
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State of RxJSng-conf 2020: Hardwired2020-04-01
RxJS announces v7 beta with concrete changes: improved TypeScript 3.8 type inference (rest args now infer beyond nine), creation of animationFrames, and new…
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Speaker Q & Ang-conf 2020: Hardwired2020-04-01
Answers land on specifics: graphql and ngrx can coexist and patterns are coming; use Firebase serverless functions to write to a CDN for fast cached SPA…
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How To Build Your Own RxJS Operatorsng-conf 20192019-05-01
RxJS reports 8.7 million npm downloads per week and ships 6.5.1 with new helpers like fromFetch and forkJoinObject plus a new scheduled helper; a roadmap…
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Complex Features Made Easy With RxJSJSFoo 20182018-10-26
Angular + RxJS code adds an automatic polling reload via timer and a pull down to update UI that coordinates touchstart/touchmove/touchend events, HTTP (shared…
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Adding Reactivity to your Web Apps using RxJSQCon São Paulo 20182018-05-09
Adds a timed auto-refresh and a working drag down to refresh to an Angular app using RxJS. Builds a TouchDragToLoad component that wires…
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Introducing RxJS6!NGConf 20182018-04-18
Explains concrete changes in RxJS 6: unhandled error scheduling moves synchronous unhandled throws to a scheduled hostReport so producer‑interference bugs stop…
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Angular PanelNGConf 20182018-04-18
Panel gives concrete roadmap and tradeoffs: progress on Ivy with a strict backward‑compatibility goal, zones made optional since v5, semantic versioning plus…
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Advanced RxJS: State Management and AnimationsJazoon TechDays Spring 20172017-04-28
Covers concrete recipes using RxJS to drive animations with requestAnimationFrame and the RxJS animation frame scheduler, turning frames into elapsed…
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Reactive Programming with RxJS A Beginner’s Perspectiveng-conf 20172017-04-05
Builds a working Angular demo using RxJS 5.3, Angular's Http and Subjects to implement a lookahead search, composes typed and voice input via the Web Speech…
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RxJS 5 In Modern Web ApplicationsNG Poland 20162016-11-22
RxJS 5 is presented as a performance- and spec-focused rewrite and shows concrete patterns: observables are just functions (you return a teardown), operators…
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Async Redux Actions With RxJSReact Rally 20162016-08-25
Shows how redux-observable middleware wires RxJS observables into Redux as “epics” that take streams of actions and return action streams, using switchMap for…
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Managing Async With ObservablesJazoon TechDays Spring 2016 Bern2016-04-08
Describes RxJS 5 as a replacement for promises with built‑in cancellation and laziness, demonstrates switchMap to abort stale AJAX calls (visible as canceled…
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Reactive all the Thingsng-conf 20152015-03-05
A fast realtime dashboard at Netflix hits severe GC and latency from heavy map/filter/reduce chains that allocate many intermediate arrays, so RxJS observables…
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