VID 40 - RECORD LOCKING - Learn JavaScript with Creative Coding - fun, colorful and free!

VID 40 [Lesson 09 - Data] - Dr Abstract teaches JavaScript on the Canvas with the following topics:
0:00 - intro to creative coding video 40
0:11 - last Data video!
0:32 - review of last video on ZIM Base
1:18 - example for this video - star rating!
2:08 - looking that the HTML for the example
2:42 - ZIM Explore on this code: https://www.youtube.com/watch?v=8L0TBL4tvNU
3:10 - has the user voted? Bind to localStorage
6:16 - default bind when there are TWO binds
7:15 - binding the rating data
8:00 - processing data in JavaScript rather than in PHP or SQL
9:33 - record locking to ensure only one person changing data
10:25 - solution 1. - steps: call from, change data then call to
13:22 - solution 2. - toLock - handles all the steps!
14:02 - updating data in filter in the "from" stage
16:12 - PHP for the stars - single record with JSON id, lockid, json
17:12 - random lockid
18:15 - FROM comes first to get latest data
18:50 - locking the record on the from
19:35 - how locking works in PHP
20:15 - sending results back
20:45 - inserting vote and clearing the lockid
21:55 - review of PHP
22:19 - wrap up of ZIM Base and data
23:09 - Ending video - Pragma calling Dr Abstract with symbol of Nodism
23:18 - Thank you! Hope vids help! Please share - https://zimjs.com/slack

The Learn JavaScript with Creative Coding is a video series to help left brain and right brain learners explore the wonders of programming using the fun, colorful and friendly HTML Canvas and ZIM. Dr Abstract is a Canadian New Media Awards winner for Programmer and Educator of the Year. He will teach the basics of programming in JavaScript from the ground up so welcome designers, artists, engineers, developers, and all.

The video lessons are supported by ZIM Skool at https://zimjs.com/skool and make an excellent introduction to code at a high school and college levels or for the #100DaysofCode movement and workshop organizations like #CanadaLearningCode. Younger students can go to https://zimjs.com/kids.

We hope you share these lessons with friends, family, work colleagues and any aspiring creators! Cheers, please subscribe, share on social media and give the videos a like if you have likes to give. You are welcome to join us at https://zimjs.com/slack/ to ask questions, discuss code and share examples.

Thanks to BigTRBL - DJ at Shaolin in Hamilton for the intro tune!

Cheers from #LearnJavaScript with #CreativeCoding and #DrAbstract founder of #ZIMjs