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stuartsierra
component
Clojure2013–2025
stuartsierra / component

component

Managed lifecycle of stateful objects in Clojure

Languages & Compilers
Explore on GitHubRead Hacker News discussions
18Distinct people
19Mentions
1Explicit recommenders
2.2KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Managed lifecycle of stateful objects in Clojure

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

Stuart Sierra's Component: https://github.com/stuartsierra/component and his 'reloaded' workflow: http://thinkrelevance.com/blog/2013/06/04/clojure-workflow-r... I haven't…

lsh used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 7:24:48 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year19 dated mentions

Observed mentions: 2013-11-21 19:12:43 UTC to 2025-10-19 10:20:54 UTC.

01232013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments20132014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 3 mentions; 1 submissions, 2 comments20192020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2025

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC110
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC202
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC110
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC202
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC101
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC202
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC312
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC202
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC202
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC101
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC101
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC000
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC101

What Hacker News says

2 sources
winkelwagen·Oct 19, 2021
I agree with the main sentiment from the article. Although I do think they are discussing Inversion of control more-so than dependency injection. One of my first languages was .net and I was never able to really understand DI in that context that well. Actually using javascript and ducktyping made me understand what it actually was. I remember a .net job interview where I had to write a micro-service and opted to construct the dependency graph in the main function initialising "all" the classes there. Instead of discussing the pro's and con's of that approach they berated me for not using a DI framework (No I did not land that job, but in hindsight it was the most expensive job interview I've ever had. The room was filled with 8 developers going over my code). The main thing the article glosses over is state. something people with a funct
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ional background hide from. But if you look at something like the httpclient in .net. I think it took the .net world like 10 years to start using the httpclient properly. Scope and lifetime of those kind of objects are important. managing connection pools, retry state, throttling or the incoming http request. DI does make that kind of thing easieR (I'm not saying it makes it better) Look at clojure's component(https://github.com/stuartsierra/component), I'm not a clojure expert by far. But it is kinda DI/IOC in a functional language. In closing we can agree that it is underused in the right places and overused in the wrong ones.
In Printf(“%s %s”, dependency, injection)
CraigJPerry·Jan 3, 2021
I’m thinking a SQL console mostly qualifies per the article’s idea of a repl. The break loop concept isn’t perfect there though. I’ve always liked the python repl, breaking out a django repl and being able to manipulate the db via the api always felt like a super power to me when coupled with the expressiveness of basic python but last year i started dabbling with Clojure. My first “real” repl driven development experience. 2 things stood out for me: 1. You end up with some genuinely useful executable documentation and it just makes sense to me to preserve some of what i did in the repl while developing. I saw this first here: https://github.com/stuartsierra/component/blob/master/dev/ex... 2. Integration with your editor is essential - having a keystroke to send a form to the repl or evaluate in-line is a real productivity boost. It’s lik
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e writing code while an intelligent debugger is permanently live. You don’t need to wait for a compiler run then parse the feedback, it’s just instant in-line runtime feedback. “Paredit” is really sweet. I used calva in vs code for this and tbh it’s as attractive as the language in some ways. I have no idea how to meaningfully apply those concepts to something like python or javascript though. They just don’t lend themselves to that kind of structural editing.
In On Repl-Driven Programming

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