# Uncategorized

**URL:** https://forum.kirupa.com/c/uncategorized/1.md?page=7

[Latest](https://forum.kirupa.com/latest.md) · [Categories](https://forum.kirupa.com/categories.md)

**Page:** 8

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## [Mathlets: Bezier Curves Tool](https://forum.kirupa.com/t/mathlets-bezier-curves-tool/655633)

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**Author:** [@drosswick](https://forum.kirupa.com/u/drosswick)\
**Replies:** 2\
**Last updated:** [December 21, 2022, 4:33pm UTC](https://forum.kirupa.com/t/mathlets-bezier-curves-tool/655633 "2022-12-21T16:33:44Z")

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Has a replacement/update been issued for this tool? The link in the Canvas Book (Page 51) does not work.

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## [JAVASCRIPT: return statement in normal vs arrow functions.](https://forum.kirupa.com/t/javascript-return-statement-in-normal-vs-arrow-functions/655506)

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**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\
**Replies:** 2\
**Last updated:** [December 16, 2022, 2:32am UTC](https://forum.kirupa.com/t/javascript-return-statement-in-normal-vs-arrow-functions/655506 "2022-12-16T02:32:00Z")

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Source code: How to use the JavaScript filter array method? - Flexiple Tutorials let freelancers = \[{name: "Harry", skill: "JavaScript"},{name: "Mark", skill: "Python"},{name: "David", skill:"JavaScript"}\]; let javascr…

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## [Error](https://forum.kirupa.com/t/error/655491)

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**Author:** [@Ruslan0308c](https://forum.kirupa.com/u/Ruslan0308c)\
**Replies:** 1\
**Last updated:** [December 14, 2022, 6:37pm UTC](https://forum.kirupa.com/t/error/655491 "2022-12-14T18:37:17Z")

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Error - React! React! React! (kirupa.com)

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## [What is better to use in JSX?](https://forum.kirupa.com/t/what-is-better-to-use-in-jsx/655468)

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**Author:** [@Ruslan0308c](https://forum.kirupa.com/u/Ruslan0308c)\
**Replies:** 2\
**Last updated:** [December 14, 2022, 11:51am UTC](https://forum.kirupa.com/t/what-is-better-to-use-in-jsx/655468 "2022-12-14T11:51:41Z")

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Hello, I recently started learning React and I’m wondering what is better to use in JSX, a function or a class. I will be glad if you answer and explain why it is better.

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## [Thanks for the books](https://forum.kirupa.com/t/thanks-for-the-books/655469)

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**Author:** [@Ruslan0308c](https://forum.kirupa.com/u/Ruslan0308c)\
**Replies:** 1\
**Last updated:** [December 14, 2022, 1:04am UTC](https://forum.kirupa.com/t/thanks-for-the-books/655469 "2022-12-14T01:04:28Z")

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Thank you Kirupa for the books. I read with pleasure. I have your JavaScript and React books, I will buy 2 more books soon. And by the way, I have a question, book “Arrays From Noob to Ninja” there on JS? And when will t…

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## [Что лучше использовать в JSX?](https://forum.kirupa.com/t/jsx/655464)

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**Author:** [@Ruslan0308c](https://forum.kirupa.com/u/Ruslan0308c)\
**Replies:** 1\
**Last updated:** [December 13, 2022, 5:44pm UTC](https://forum.kirupa.com/t/jsx/655464 "2022-12-13T17:44:52Z")

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Здравствуйте, я недавно начал изучать React и мне вот интересно что лучше использовать в JSX, функцию или класс. Буду рад если ответите и объясните почему это лучше.

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## [How do I think about recursion.](https://forum.kirupa.com/t/how-do-i-think-about-recursion/655414)

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**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\
**Replies:** 4\
**Last updated:** [December 13, 2022, 3:40am UTC](https://forum.kirupa.com/t/how-do-i-think-about-recursion/655414 "2022-12-13T03:40:26Z")

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I got the idea for problems like factorials or finding sum from 1 to n, where there’s a pattern visible. Like this: Source:https://99x.io/blog/recursion-is-not-hard-here-is-the-right-way-to-think But I’m confused fo…

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## [Looking for a backend developer](https://forum.kirupa.com/t/looking-for-a-backend-developer/654182)

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**Author:** [@tbo](https://forum.kirupa.com/u/tbo)\
**Replies:** 5\
**Last updated:** [October 25, 2022, 3:56am UTC](https://forum.kirupa.com/t/looking-for-a-backend-developer/654182 "2022-10-25T03:56:30Z")

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Where would you recommend finding a back-end developer other than posting a position on the standard job search websites like indeed etc? Looking for someone full-time remote

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## [Ensuring Consistent Animation Speeds](https://forum.kirupa.com/t/ensuring-consistent-animation-speeds/655241)

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**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 0\
**Last updated:** [December 6, 2022, 2:04am UTC](https://forum.kirupa.com/t/ensuring-consistent-animation-speeds/655241 "2022-12-06T02:04:04Z")

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I’ve been writing and re-writing this article a few times already, but I think this is the version that is going to stick!

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## [Google Doodle on Jerry Lawson!](https://forum.kirupa.com/t/google-doodle-on-jerry-lawson/655134)

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**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 0\
**Last updated:** [December 2, 2022, 4:03am UTC](https://forum.kirupa.com/t/google-doodle-on-jerry-lawson/655134 "2022-12-02T04:03:01Z")

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If you like fun computer history, 8-bit pixelart (who wouldn’t?), and want to play some fun interactive games, check out today’s Google doodle! :stuck\_out\_tongue: https://twitter.com/kirupa/status/1598526695572934656

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## [Remote 3d presentations](https://forum.kirupa.com/t/remote-3d-presentations/654965)

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**Author:** [@tbo](https://forum.kirupa.com/u/tbo)\
**Replies:** 4\
**Last updated:** [November 29, 2022, 3:36pm UTC](https://forum.kirupa.com/t/remote-3d-presentations/654965 "2022-11-29T15:36:36Z")

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A few months ago I read something about this but I don’t remember what it was. If I were to screen share during a virtual meeting, the video frame rate is not quite high enough to showcase a games performance. I can’t …

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## [issue with an article using document.createElement("script") giving me an error](https://forum.kirupa.com/t/issue-with-an-article-using-document-createelement-script-giving-me-an-error/654894)

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**Author:** [@Mark\_Edwards](https://forum.kirupa.com/u/Mark_Edwards)\
**Replies:** 13\
**Last updated:** [November 25, 2022, 1:07am UTC](https://forum.kirupa.com/t/issue-with-an-article-using-document-createelement-script-giving-me-an-error/654894 "2022-11-25T01:07:49Z")

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Loading Script Files Dynamically hello - when i enter the following lines from this article: let myScript = document.createElement("script"); myScript.setAttribute("src", "https://cdn.socket.io/4.5.3/socket.io.js"); do…

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## [Why do display:inline for radio and checkbox label only when already each label is set to inline-block?](https://forum.kirupa.com/t/why-do-display-inline-for-radio-and-checkbox-label-only-when-already-each-label-is-set-to-inline-block/654817)

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**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\
**Replies:** 3\
**Last updated:** [November 20, 2022, 4:03pm UTC](https://forum.kirupa.com/t/why-do-display-inline-for-radio-and-checkbox-label-only-when-already-each-label-is-set-to-inline-block/654817 "2022-11-20T16:03:41Z")

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Here, custom-label class consists of radio and checkbox labels. The only special feature of inline-block is that you can set width and height like block(and everything appears on same line like inline). label { displ…

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## [Easily figure out your frame rate!](https://forum.kirupa.com/t/easily-figure-out-your-frame-rate/654237)

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**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 5\
**Last updated:** [November 20, 2022, 6:32am UTC](https://forum.kirupa.com/t/easily-figure-out-your-frame-rate/654237 "2022-11-20T06:32:38Z")

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I wanted to test something out in Firebase, and I ended up creating https://framerate.dev https://twitter.com/kirupa/status/1585489813192708096 :grinning:

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## [Accessing Your Webcam in HTML WiFi](https://forum.kirupa.com/t/accessing-your-webcam-in-html-wifi/654722)

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**Author:** [@NigeM](https://forum.kirupa.com/u/NigeM)\
**Replies:** 3\
**Last updated:** [November 16, 2022, 4:57pm UTC](https://forum.kirupa.com/t/accessing-your-webcam-in-html-wifi/654722 "2022-11-16T16:57:46Z")

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I can successfully set up Accessing Your Webcam in HTML as described. Can I change the source to use a WiFi camera instead of my laptop camera?

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## [Holy grail layout using grid-column-start, grid-row-start…?](https://forum.kirupa.com/t/holy-grail-layout-using-grid-column-start-grid-row-start/654636)

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**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\
**Replies:** 2\
**Last updated:** [November 14, 2022, 12:22pm UTC](https://forum.kirupa.com/t/holy-grail-layout-using-grid-column-start-grid-row-start/654636 "2022-11-14T12:22:44Z")

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I’ve created this layout using grids but another technique. This(type of code, I want the above layout not this one below, I want to be able to do it like the coding done below i.e using grid-column-start, grid-row…

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## [Research about meditation 🧘‍♂️](https://forum.kirupa.com/t/research-about-meditation/652255)

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**Author:** [@Wayne](https://forum.kirupa.com/u/Wayne)\
**Replies:** 4\
**Last updated:** [November 8, 2022, 8:28pm UTC](https://forum.kirupa.com/t/research-about-meditation/652255 "2022-11-08T20:28:32Z")

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I’m trying to meditate and while I’m doing that, I cannot find proof that it works. Everywhere I search for papers. They state, they can’t proof it helps. Do you meditate? How often? How does it work for you?

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## [TypeError: Failed to execute 'createElement' on 'Document':](https://forum.kirupa.com/t/typeerror-failed-to-execute-createelement-on-document/654438)

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**Author:** [@vmars316](https://forum.kirupa.com/u/vmars316)\
**Replies:** 3\
**Last updated:** [November 8, 2022, 3:16am UTC](https://forum.kirupa.com/t/typeerror-failed-to-execute-createelement-on-document/654438 "2022-11-08T03:16:34Z")

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Hello & TIA , Sorry , I can’t figure out what’s wrong : \<!DOCTYPE html\> \<!-- saved from url=(0089)file:///C:/drag-and-drop-ducks-master/Create-Element-P-w3s-document.body.appendChild.html --\> \<html\>\<head\>\<meta …

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## [No tasks are added to the scheduler React](https://forum.kirupa.com/t/no-tasks-are-added-to-the-scheduler-react/654471)

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**Author:** [@johndeere7830](https://forum.kirupa.com/u/johndeere7830)\
**Replies:** 1\
**Last updated:** [November 7, 2022, 4:15am UTC](https://forum.kirupa.com/t/no-tasks-are-added-to-the-scheduler-react/654471 "2022-11-07T04:15:08Z")

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The tasks that I am trying to add to my application scheduler using the map method are not rendered. I checked in props an object with an array is coming, but after trying to map it, it does not appear in my application.…

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## [Discussing the Future of AI](https://forum.kirupa.com/t/discussing-the-future-of-ai/654065)

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**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 2\
**Last updated:** [October 31, 2022, 4:28pm UTC](https://forum.kirupa.com/t/discussing-the-future-of-ai/654065 "2022-10-31T16:28:25Z")

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I had a chance to chat with walkthroughwonder aka Edwin…aka vts31 for a lot of you long time forumers :stuck\_out\_tongue: I cross shared this on my newsletter, which if you haven’t subscribed to yet, you…to…

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## [Не выводит список](https://forum.kirupa.com/t/topic/654270)

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**Author:** [@forumf](https://forum.kirupa.com/u/forumf)\
**Replies:** 5\
**Last updated:** [October 31, 2022, 4:26pm UTC](https://forum.kirupa.com/t/topic/654270 "2022-10-31T16:26:26Z")

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\<!DOCTYPE html\> \<html lang="en"\> \<head\> \<meta charset="UTF-8"\> \<meta http-equiv="X-UA-Compatible" content="IE=edge"\> \<meta name="viewport" content="width=device-width, initial-scale=1.0"\> \<title\>Docu…

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## [The internet world](https://forum.kirupa.com/t/the-internet-world/191552)

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**Author:** [@fabiopb](https://forum.kirupa.com/u/fabiopb)\
**Replies:** 0\
**Last updated:** [June 21, 2006, 8:44am UTC](https://forum.kirupa.com/t/the-internet-world/191552 "2006-06-21T08:44:06Z")

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http://www.kirupa.com/forum/showthread.php?t=35717 if you see the post i made here, you might understand why i am writing this... when i moved to where i am now, in sept 2001, my life changed completely. having start…

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## [Webcam in Browser - Specify device](https://forum.kirupa.com/t/webcam-in-browser-specify-device/654165)

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**Author:** [@Michael\_Herbert](https://forum.kirupa.com/u/Michael_Herbert)\
**Replies:** 1\
**Last updated:** [October 20, 2022, 7:18pm UTC](https://forum.kirupa.com/t/webcam-in-browser-specify-device/654165 "2022-10-20T19:18:07Z")

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Hey Kirupa et al, I found your code and tutorial super useful taking a Camlink 4K to use within a browser but I’m wondering if there is a way to specify a specific device within the js so that it does not revert to a di…

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## [Draw a line to follow mouse from a permanent fixed point](https://forum.kirupa.com/t/draw-a-line-to-follow-mouse-from-a-permanent-fixed-point/653195)

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**Author:** [@Phoeberomana](https://forum.kirupa.com/u/Phoeberomana)\
**Replies:** 4\
**Last updated:** [October 13, 2022, 12:17am UTC](https://forum.kirupa.com/t/draw-a-line-to-follow-mouse-from-a-permanent-fixed-point/653195 "2022-10-13T00:17:34Z")

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I would like to make 1px wide line where its point A will be in a given div, and point B will be the mouse, so when I move the mouse, the line is following along. Is this possible. The fixed point will never change, but…

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## [From Coding Exercises to Coding Missions!](https://forum.kirupa.com/t/from-coding-exercises-to-coding-missions/653577)

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**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 4\
**Last updated:** [October 6, 2022, 1:42am UTC](https://forum.kirupa.com/t/from-coding-exercises-to-coding-missions/653577 "2022-10-06T01:42:21Z")

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Hi everyone - something I’m kicking the tires with is trying out small coding challenges (that I’m calling missions) that people can partake in, post their solution, and get a customized badge for each coding challenge. …

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## [Do we need frameworks at all?](https://forum.kirupa.com/t/do-we-need-frameworks-at-all/649129)

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**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 32\
**Last updated:** [September 30, 2022, 1:49pm UTC](https://forum.kirupa.com/t/do-we-need-frameworks-at-all/649129 "2022-09-30T13:49:15Z")

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I was fiddling with something yesterday, and I was really impressed with web components, the latest layout capabilities, and more. A part of me wonders why anybody wanting to build a web app from scratch today would want…

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## [php noob - simple cache fix?](https://forum.kirupa.com/t/php-noob-simple-cache-fix/652559)

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**Author:** [@Sumpson](https://forum.kirupa.com/u/Sumpson)\
**Replies:** 6\
**Last updated:** [September 30, 2022, 1:48pm UTC](https://forum.kirupa.com/t/php-noob-simple-cache-fix/652559 "2022-09-30T13:48:09Z")

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Hi! We got a custom php calendar for apartment reservations…its working fine but sometimes when I/clients visit the website the calander shows weeks available when they are reserved. This seems to be a caching/memory pr…

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## [Java script version](https://forum.kirupa.com/t/java-script-version/653672)

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**Author:** [@Shicksal](https://forum.kirupa.com/u/Shicksal)\
**Replies:** 2\
**Last updated:** [September 22, 2022, 2:43pm UTC](https://forum.kirupa.com/t/java-script-version/653672 "2022-09-22T14:43:26Z")

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I read book about Java script and I think that Java was updated to latest version and there are changes if compare it to old book and new version is that right? So how as developer I find right codes to compile them .

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## [Lost without Flash](https://forum.kirupa.com/t/lost-without-flash/653615)

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**Author:** [@KyMrn](https://forum.kirupa.com/u/KyMrn)\
**Replies:** 5\
**Last updated:** [September 20, 2022, 3:42pm UTC](https://forum.kirupa.com/t/lost-without-flash/653615 "2022-09-20T15:42:54Z")

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For many years I used Macromedia Flash and stuck with it thru Adobe years until the final death nell :frowning: I once created beautiful web sites for a living and Youtube content for fun. When it all came crashing down…

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## [Valuable Life Skill #1095](https://forum.kirupa.com/t/valuable-life-skill-1095/653386)

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**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 0\
**Last updated:** [September 6, 2022, 6:14pm UTC](https://forum.kirupa.com/t/valuable-life-skill-1095/653386 "2022-09-06T18:14:18Z")

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Half my college life was spent staring at unopenable cans and wondering if I should hit it with a rock to open…like a :monkey:

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