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INTEVITY ACQUIRES TECHABO

Microchip Technology Inc. will showcase its expanded RISC-V-based devices and design tools including a new BeagleBoard hardware and system-on-module (SoM) at the upcoming 2023 RISC-V Summit. According to Microchip, to create complex intelligent edge ...

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I am a big fan of leet code so when we decided to have a code challenge in our team I thought it wouldn’t be a bad idea to build one which should include pretty basic functionalities like: Ability to register and sign in to the application Present the problem (questions) Provide an interface for the end-users to write, compile and execute code. Overall, it was an amazing learning experience and I am happy to walk through how I did it. Guidelines Before I start working on this I decided to come up with some guidelines so I don't over-engineer this and end up building a Frankenstein out of it, here are few of those guidelines: The whole system should be implemented in 3 to 4 days Reuse as much as you can when it comes to technology or service. build anything new unless until it doesn't exist DON'T standing cost for the infrastructure. Pay for what you use and pay as you can ZERO ONLY MINIMAL Technologies & Runtime Services + JQuery (UI) Bootstrap AWS Lambda AWS API Gateway AWS Dynamodb AWS Dynamodb streams AWS Simple email service (SES) AWS S3 (For static site hosting) High-level Architecture The system consists of four keys functionalities based on which these modules are designed: Registration & sign-in Compile & Execute Score Calculator Winner Predictor Registration & Sign-in Flow We have a single lambda function that takes care of registering a new user and authenticating an existing user in the application. Part of registration flow user enters “FirstName”, “LastName” & “Email address” which is passed in as “QueryParam” to API gateway. Gateway invokes a Lambda function which takes care of saving the user details in DynamoDb, generating a random registration code (UUID based) and sending it in an email to the registered email address The sign-in flow will authenticate the user with the passed in email address and UUID using the Lambda function Compile & Execute When the user submits the code, the web application will call the API gateway with the following parameters: QuestionsId User types code Registration code API gateway will invoke the lambda function which will get information about the question/problem statement from the “Questions” table in Dynamodb (data looks like below). From the table data, we take the “GeneratedCode” attribute value and replace various tokens like — name — , — codeworking — & — testcases — with the class name (generated), the user typed code, and test cases (from columns “Test_1”… “Test_N”). Here is how the replaced code will look: { { { count= ; index= ; ( ){ {
                  s.charAt(index++);
                  count++;
              } (Exception e){ ;
              }
          } count;
      }
   } { actual= ; expected = ;
        String input = ; input = ;
        expected = ;
        actual = Solution.calculate(input); actual == expected :  String.format( , input, expected, actual);
    }
} // --name-- public class f_sdsds_a11223_dd // --codeworking-- static class Solution public static int calculate (String s) int 0 int 0 while true try catch break return public static void main (String args[]) int 0 int 3 null // --testcases-- "Hi1" 3 assert "--helper-- Input %s -> Expected = %s but got = %s" Since Lambda containers don't have JDK installed we have to package “tools.jar” inside the deployment package so we can run the compilation inside the containers, here is the code snippet on how we run compile inside lambda: (StringInputStream inputStream = StringInputStream(data);
     ByteArrayOutputStream outputStream = ByteArrayOutputStream();
     ByteArrayOutputStream errorOutputStream = ByteArrayOutputStream()) {
    Class<?> javacTool = Class.forName( );
    Method create = javacTool.getMethod( );
    JavaCompiler compiler = (JavaCompiler) create.invoke( );
    compiler.run(inputStream, outputStream, errorOutputStream, path.toFile().getAbsolutePath()); ProcessResponse(replaceNewLine(outputStream), replaceNewLine(errorOutputStream));
} (Exception e) { ProcessResponse( , + e.getMessage());
} try new new new "com.sun.tools.javac.api.JavacTool" "create" null return new catch return new null "Compilation error --> " If compilation is successful, we run the generated class which contains the test cases. java -ea -cp /tmp/f_sdsds_a11223_dd If execution is successful without any assertion failures, execution time is stored in “UserSubmission” table. Score Calculator We utilize DynamoDB streams to update the total points and total execution time for any given user. A lambda function listens to all updates done on “UserSubmission” table and performs these calculations once the submission is successful. Winner Predictor To find the winners, we run a simple query to get the top 3 rows in “UserStastics” table generated by sorting “TotalPoints” column in descending order and “TotalExecution” column in ascending Demo Here is the demo of the application: I know this doesn't solve all the use cases that a popular code challenge websites like “leetcode” or “topcoder” solves. But this is a good start & foundation which we can keep adding on. If you like this post then leave a comment. That way, I know you have made it all the way to the end 😀 . Thanks again for reading. Previously published at https://medium.com/javarevisited/build-code-challenge-application-23aa40d183fa

Leetcode Coding Challenge Using Lambda

Whether you love it or hate it, working from home is the new normal. But as we welcome people virtually into our dusty living rooms filled with unused gym equipment and jealous cats, there's a lot of room for the professional masks we put on to slip in unexpected ways. This Slogging thread by Akasha Rose, Amy Tom, David Smooke and Justin Roberti occurred in slogging's official #future-of-work channel, and has been edited for readability. Akasha Rose Mar 6, 2021, 1:09 AM What is your funniest (or most cringe-worthy) working from the home moment? Have you had to tell anyone that you are "not a cat"? Amy Tom Mar 8, 2021, 10:16 PM ❤ 1 I don’t think I’ve had a truly cringeworthy moment yet. I’ve been frozen in the middle of a blink or animated conversation on Zoom for sure… many times. 😂 BUT on a side-note I’m obsessed with the cat lawyer. “I’m not a cat” is exactly what a lawyer pretending to be a cat would say Akasha Rose Mar 9, 2021, 7:22 AM 💯 1 That video had me absolutely paralysed with laughter whenever I recalled it for the next six days. I was actually in a lawyer's office when I first saw it and was in spasms showing all the staff. What kind of world do we live in now if an esteemed lawyer has to convince people he really isn't a cat? It was like something out of a Miyazaki film, Howls Moving Castle maybe. My own "cat" moment was recently when my cat was walking over my keyboard when the mic was off, only to step on the mouse and click it right when it was positioned over the mic icon, switching the mic back on just as I was saying "Oh not the cat's butt" very loudly to an audience of about 50 people who didn't know me thankfully. David Smooke Mar 10, 2021, 8:55 AM Only 10M views! that video deserves more! It's a national treasure in my book. I bet 394th District Court of Texas could get some major cash if they listed that video for sale as an NFT! I do also wonder how much they've already made from it via licensing it the BBCs and CNNs of the world .. https://www.youtube.com/watch?v=KxlPGPupdd8 David Smooke Mar 10, 2021, 9:03 AM 🔥 1 😄 1 It wasn't too cringy but I did recently do something that would make you shocked to learn I run a technology company...  I was just starting to speak at Mozilla Love the Internet Hackathon, and as to not be distracted I x-ed the Hopin discussion, made my slides full screen and dove right in. Couple minutes in, I see my phone vibrating, it's the organizer calling. "You're on mute." Sure enough, the chat is like "he's muted, "still muted and he doesnt know," and "Now he's just taking phone calls..." I had  clicked share video and not share audio although I thought the button  said share video and audio. I just started from the beginning and did the thing again. Justin Roberti May 14, 2021, 4:08 AM 🔥 1 :slogging-slack-blogging: 1 💚 1 I had a cringeworthy moment yesterday -- a prominent billionaire crypto investor/VC was on a Zoom call early for a podcast I produce. His usual assistant was on vacation, Calendly didn't update when we agreed to push it back 30 minutes, so I had to fill 20 minutes and keep him on the line or I was afraid the podcast wouldn't happen. I had to fill 20 minutes so I jumped on to say hi because I've corresponded with him for at least 3 years. It's been a long time WFH so I really would have preferred to shave before this video call, my hair is large and unmanageable, but I did manage to throw on a nice shirt. I said hi and explained we kind of "know" each other (he did not remember me at all) and he looked at me and said, "So, what are we doing here?" Like a guest that would like to not have his time wasted, so I thought "OK, we are doing an interview now." And I kind of choked. So I started with "So... what's up with Dogecoin?" Like for that moment my muse had left me and I just had nothing. He responded, "I don't know... it's got a dog. People like dogs. Dogs are cute." He was that level of interviewee where you can essentially do no wrong because he will launch into what he talks about pretty much no matter where you start. It was fine, the host got on and we did the podcast. He even gave me some thoughts on Dogecoin beyond the dog. But... i was seriously not prepared and for a very long second I was feeling it. Some day I will make an NFT of this moment Akasha Rose May 15, 2021, 4:32 AM When is the interview out? Justin Roberti May 15, 2021, 3:46 PM Akasha Rose TBH i didn't think i had anything I could use. But I got some comments on BTC and that turned out to be useful: https://www.benzinga.com/markets/cryptocurrency/21/05/21126509/bitcoin-gets-a-carbon-black-eye-from-musk-but-draper-stands-by-price-predictions Akasha Rose May 17, 2021, 1:08 AM What is it with cats and zoom calls, anyway? As soon as I start having a zoom call on my laptop, the cat thinks it is a personal invitation to sit on my lap. Or shoulder. Or back of the chair. And of course, it's not just any cat, it's the fluffiest cat there is.  I put him in the other room but he literally climbs up the door with his claws hanging from it and howling, smacking his body against the door panels. Having him on the laptop or my head is actually far less distracting than his pitiful mews. A friend sent me this meme as the only solution.

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