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Fri, Aug 9 10:06 PM → 10:33 PM WMATA Train 552 Archives Track 2 gets stuck due to a console issue. httpsx.comMetrorailinfostatus1822034583149294056 Radio Systems: - Washington Metropolitan Area Transit Authority
Web and Mobile App Development (Language Agnostic, and Based on Real-life experience!)
In this podcast episode, the host continues the discussion on Confluent Cloud and focuses on adding a consumer and creating a Go client. The process of building a producer and troubleshooting and debugging common issues is also covered. The host explores topics such as topic creation, error handling, and configuration. Known issues and workarounds are discussed, along with cluster settings and security protocols. The episode concludes with final debugging and error handling techniques. In this conversation, Krish explores the process of publishing messages to a Kafka topic using a Go client. He encounters some issues along the way, such as delivery failures and SSL connection problems. However, after making some code changes and switching back and forth, the publishing starts working unexpectedly. Krish also discusses the use of Go channels in the producer and the importance of reading config and initializing the producer correctly. He concludes by mentioning the next steps, which involve consuming the messages from the topic. Takeaways Adding a consumer and creating a Go client are important steps in working with Confluent Cloud. Troubleshooting and debugging are essential skills when working with messaging systems like Kafka. Understanding topic creation, error handling, and configuration is crucial for successful message production. Being aware of known issues and their workarounds can save time and effort in troubleshooting. Configuring cluster settings and security protocols correctly is essential for smooth operation. Publishing messages to a Kafka topic using a Go client involves initializing the producer and ensuring the correct configuration. Go channels can be used in the producer to handle message production. Reading the config and initializing the producer correctly is crucial for successful message publishing. Issues such as delivery failures and SSL connection problems can be resolved by making code changes and switching back and forth. Chapters 00:00 Introduction and Recap 02:30 Adding a Consumer 03:44 Creating a Go Client 08:08 Building the Producer 10:55 Creating a Consumer 17:30 Troubleshooting and Debugging 21:02 Topic Creation and Message Production 25:48 Error Handling and Configuration 33:27 Continued Troubleshooting 46:20 Correcting Configuration Issues 55:41 Known Issues and Workarounds 59:12 Cluster Settings and Security Protocols 01:01:07 Final Debugging and Error Handling 01:02:19 Connecting to the Bootstrap Server 01:03:47 Using Channels 01:04:48 Replacing Code and Expecting a Broker and Topic 01:05:21 Building and Running with Broker and Topic 01:06:36 Using Go Channels in the Producer 01:07:16 Reading Config and Initializing the Producer 01:08:43 Delivery Failed and SSL Connection 01:10:13 Sending Messages via Postman and Code 01:11:02 Switching Code and Unexpected Working 01:11:39 Messages Sent and Refreshing Stand 01:12:55 Publishing to Different Topics 01:13:32 Publishing Messages and Minor Changes 01:14:00 Initializing the Producer and Randomizing Messages 01:15:09 Failed to Deliver Message and Event Types 01:17:00 Producing Messages with Go Routine 01:18:13 Producing Messages and Business Functionality 01:19:21 Producing Messages and Printing Output 01:21:48 Subscription to the Topic 01:22:37 Go Routine and Message Type 01:23:56 Event Types and Handling 01:30:07 Error Handling and Non-Existent Topic 01:32:12 Next Steps: Consuming Messages Snowpal Products: Backends as Services on AWS Marketplace Mobile Apps on App Store and Play Store Web App Education Platform for Learners and Course Creators
Weight initialization plays an important role in neural network training. Widely used initialization methods are proposed and evaluated for networks that are trained from scratch. However, the growing number of pretrained models now offers new opportunities for tackling this classical problem of weight initialization. In this work, we introduce weight selection, a method for initializing smaller models by selecting a subset of weights from a pretrained larger model. This enables the transfer of knowledge from pretrained weights to smaller models. Our experiments demonstrate that weight selection can significantly enhance the performance of small models and reduce their training time. Notably, it can also be used together with knowledge distillation. Weight selection offers a new approach to leverage the power of pretrained models in resource-constrained settings, and we hope it can be a useful tool for training small models in the large-model era. Code is available at https://github.com/OscarXZQ/weight-selection. 2023: Zhiqiu Xu, Yanjie Chen, Kirill Vishniakov, Yida Yin, Zhiqiang Shen, Trevor Darrell, Lingjie Liu, Zhuang Liu https://arxiv.org/pdf/2311.18823v1.pdf
Please insert disc 2. This time we’re closing out characters with third techs, jumping on a tombstone, giving a book to a homeopathic surfer, eating children, pushing blobs for butterflies, kicking turds, visiting our doomed dimensional twin, diseasing opponents, cooking with a brother, inspiring a mermaid, pushing through fate distortions, and unloading Fate lore. Eric is the fake net in this one. 01:07 Intro | 02:58 Tech Bonanza: Greco | 09:00 Tech Bonanza: Doc | 11:10 Tech Bonanza: Funguy | 14:09 Tech Bonanza Neo Fio | 15:42 Tech Bonanza: Poshul | 16:40 Orlha | 24:40 Tech Bonanza: Luccia | 25:30 Tech Bonanza: Orcha | 27:00 Tech Bonanza: Korcha | 29:20 Dead Sea Ruins | 42:56 Real Net | 44:50 Outro Find us on Patreon at http://www.patreon.com/retroAM, on Twitter at @retroamnesiapod and through e-mail at retrogradeamnesiapodcast@gmail.com.
Welcome to this experiment!If you want to follow this journey, I'm @MaxLenormand on Twitter!
Dr. Paola Lake sits down with long time friend Dr. Maria Lizak, co-founder and executive business director with National Best Financial Network, who shares her 11 strategies for a initiating a personal reset, and how taking the time to reevaluate and reset has helped her achieve her goals and better herself. We look at the importance of a vision, the importance of a reset in achieving or modifying long term goals, and how we can use technology and the right accountability partner to improve our ability to commit to the changes we seek to make in our lives. 11 Strategies to Initiate Your Personal Reset https://youtu.be/xpPzyhpzEFc --- Send in a voice message: https://anchor.fm/drlake/message
Content Warning: Discussions of Death. Electrocution. Initializing…. Start Up Sequence Beginning 3… 2… 1... )from nullandvoid import Cast Winona Wyatt as Piper Danyelle Ellett as Adelaide Azul Nova as Dodger Evan Saft as Chris Sena Bryer as Niki Kara Bruntz as Isobella Jona Lune as Jasper JV Hampton-VanSant as Marcus Kit Harrison as Stone Royal Jonesy Jones as Sound Designer Cole Burkhardt as Creator Sterling Rae and Amber Holtz as Story Editor Benny James as Composer Transcripts can be found here or on our website at nullandvoidpod.wixsite.com/nullandvoidpod
AKA: Dancing with the Machine: Technoshamans in the Wooniverse 00:00 - 00:30 Otter.ai Device Check - iPhone 5 vs Samsung Note 9 Real-time Voice Transcription Battle 00:31 - 02:00 Samsung Note FTW 02:01 - 07:10 Enter the Wooniverse: Cyborg Light Workers Union and Technoshaman Teal Team Formation 07:11 - 09:05 Introductions and Priorities: aloha.aram on Generativity vs. Stagnation 09:06 – 11:25 Tech Stack, OKRs and Operating Manual 11:26- 12:42 Drawing the Same Trumpet Welcome to Generative Ventures, I am your guide to the 5D Economy. We are booting up holographic organizations with the intention of cultivating a community of curious, regenerative, community-serving, tech-enabled entreprenuers, designers, and advocates. Transcript by Otter.ai https://otter.ai/s/h_Te0iYtSw6hCJ3mYvaFjg Hey yo! Try Otter for free! --- This episode is sponsored by · Anchor: The easiest way to make a podcast. https://anchor.fm/app --- Send in a voice message: https://anchor.fm/generativity/message
If only you didn't exist. This time we're continuing to dream, imposing a total sentence of ten years, reacquiring Knight of Fire, shattering Ramsus' absolute confidence, launching nanoparticles into the atmosphere, battling Solarian super weapons, realizing government buildings are ships and robots, mutating into abnormal forms, eating god's apostles, subverting the Gazel, constructing monsters with organic compounds, cinematically merging Elly and Sophia, watching anime for the first time in six months, sharing blood, and torturing AI with pink lightning. They stood like tombstones. It was a graveyard for a people who destroyed each other over pride and arrogance. 00:52 - Intro 01:55 - Weltall-2 vs. Vendetta 07:49 - Activating the Mass Driver (music sample, "October Mermaid," from Creid) 14:12 - Solaris Mobile Surface Supremacy Weapon vs. Transformer 24:09 - People begin to grossly mutate 26:24 - Gazel Ministry Technosphere Theater, Part XI 29:37 - Krelian & Miang conspiracy update 35:33 - Soylent refugee regroup 41:59 - Anime: Sympathy for the Sufal (music sample, "Lost, Broken Shards," from Myth) 49:28 - Elly X Sophia 52:23 - Gazel Ministry Technosphere Theater, Part XII 58:25 - Initializing anima relic goals 01:00:57 - Outro Find us on Patreon at http://www.patreon.com/retroAM, on Twitter at https://twitter.com/retroamnesiapod and through e-mail at mailto:retrogradeamnesiapodcast@gmail.com.
Season 4: Building High-Performance Teams Effective interviews are critical to creating and sustaining high-performance teams. Good misses are the worst to happen. Past behaviours are accurate predictors of future behaviours. Hire right and build a strong foundation. This Podcast is about BEI.AtyaasaaOnline is an E-learning portal that people can preview and learn for free. You can also visit Niket Karajagi's body of knowledge on his Virtual Coaching Portal https://niketkarajagi.com. Enjoy the podcasts. AtyaasaaOnline Tech-Enabled Borderless Organization Development Portal
How does the it feel after researching and developing a product for more than three years when it finally sees the light of day? Daniel shares his feelings in regards to the recent Portmaster launch, we question whether or not we should have shipped earlier and we talk about the next steps in this new era. Have a wonderful week! Links - Download the Portmaster: https://safing.io/download/ - Github Repository: https://github.com/Safing/portmaster/ - Report UI Issues: https://github.com/safing/portmaster-ui/issues - Report Technical Issues: https://github.com/safing/portmaster/issues - Tweet by Sahil Lavingia: https://twitter.com/shl/status/1250781238178336768 Participate What could we do better? Let us know how we can improve our podcast on reddit: - r/safing: https://reddit.com/r/safing Daniels Handles - https://twitter.com/dehaavi/ - https://github.com/dhaavi/ - https://reddit.com/user/dhaavi Davids Handles - https://twitter.com/davegson/ - https://github.com/davegson/ - https://reddit.com/u/davegson/
In this new podcast episode of Startup Engineering, we will come to know about what it takes or what it may take to be into entrepreneurship ? Let's get started !! #StartupPodcast #StartupEngineering #DhananjaySuthar --- This episode is sponsored by · Anchor: The easiest way to make a podcast. https://anchor.fm/app --- Send in a voice message: https://anchor.fm/dhananjaysuthar/message Support this podcast: https://anchor.fm/dhananjaysuthar/support
In the first proper episode of Retrograde Amnesia, we frame the anime introduction in the context of the time it was made and Xenogears' overarching narrative. We go on to debate the necessity and the rationale for an additional three layer-prologue before some discussion on Lahan Village and its freakish populace. We also talk the importance of portrait-characters, the deliciousness of technobabble, small-town sleeparounds, and that son of a bitch Dan. Episode One covers the prologue through Fei's exit from Lahan village. 00:23 - Xenogears introduction 01:32 - Anime prologue recap and discussion / biblical references 03:50 - Technobabble dissection 07:48 - Speculation over depictions of mania inside the Eldridge 08:30 - "You shall be as gods," as a statement and a repeating theme 11:30 - Spotlight on the Eldridge's captain 13:08 - After the Eldridge crashes 16:45 - Prologue text / Lore dump of the modern world 19:00 - Lahan flash-forward sequence 21:50 - Xenogears actually starts in Lahan village 22:50 - Imminent flashback sequence from Fei's maid 24:30 - Fei's house, Fei's friends, local wedding preparation 24:48 - Fuckin' Dan 26:37 - Speculation that Fei, like Goku, is slightly too optimistic and aloof 27:27 - Futzin' about town / Lahan village appraisal 29:56 - "My Village is Number One" sample 33:59 - Prostitutes & Prophets 35:01 - Fuckin' Dan 37:25 - Checking on Alice / Fei through time 40:23 – Outro Find us on Patreon at patreon.com/retroAM, on Twitter @RetroAmnesiaPod, and through e-mail at retroamnesiapodcast@gmail.com
Acquiring Behavior Through Inheritance A weekly podcast about programming, development, and design through the lens of amazing books, chapter-by-chapter. Sani Metz - Object-Oriented Design in Ruby “Inheritance is, at its core, a mechanism for automatic message delegation. It defines a forwarding path for not-understood messages.” Where to Use Inheritance Objects that share a common parent - The objects that you are modeling must truly have a generalization-specialization relationship. Bicycle Touring Company - FastFeet Bikes - Mountain and Road Bikes Bikes have an overall size, a handlebar tape color, a tire size, and a chain type. Only mountain bikes have shocks Only Road bikes have handlebar tape Create a new empty Bicycle Class Let RoadBike > Bicycle And MountainBike > Bicycle When in doubt put less code in the parent, it's easier to promote code later when you need a shared code. “The general rule for refactoring into a new inheritance hierarchy is to arrange code so that you can promote abstractions rather than demote concretions.” A superclass may have many subclasses, but each subclass is permitted only one superclass. This family tree image is, however, a bit misleading. In many parts of the biological world, it's common for descendants to have two ancestors. It's really useful to rails a NotImplementedError in the parent class in the methods that are required from their children, for example, default tire_size - “Creating code that fails with reasonable error messages takes minor effort in the present but provides value forever.” Initialize > Post Initialize to append any or overrode attributes from the parent initialize method. Initialize + post_initialize Closes with a mic drop - Initializing a new RecumbentBike is so DRY and painless! “Inheritance solves the problem of related types that share a great deal of common behavior but differ across some dimension.” “The best way to create an abstract superclass is by pushing code up from concrete subclasses.” “When your problem is one of needing numerous specializations of a stable, common abstraction, inheritance can be an extremely low-cost solution.” PICKS JP: Machine Learning with JavaScript John: Refactoring UI by Adam Wathan and Steve Schoger - Hard Wired Internet - Ran a Cat 5 Cable from my router - SO WORTH IT.
Initializing… running ‘Im_The_Host_60.exe’ for every “HOST”: {run: intro.subroutine} {run: theme_song.subroutine}; else: {end} print: “This week on” val(PODCAST.NAME) “your three //definitely human// hosts will be discussing Alex Garland’s 2014 film, Ex Machina, and the things it has to say about our” val(MACHINE_OVERLORDS) “that most of our fellow humans don’t want to acknowledge. We’ll also be discussing other“ val(WEAK_MEAT_BEING) “subjects, such as the recent upheavals in the world of soccer, the joys of a good stabbing, and one of Ally’s favorite films of all time. Enjoy!” [ERROR! ERROR! Data overflow detected! SHUTTING DOWN] dump stack_overflow; EPISODE LINKS: The Atlantic - How the Enlightenment Ends by Henry Kissinger (“Yes, THAT Henry Kissinger”)The New Yorker - How Frightened Should We Be of AI? by Tad FriendWikipedia - Adam SmithWikipedia - Machiavellian Intelligence YouTube - Parenthood (1989) - “Licenses”YouTube - “Flexible Muscle-Based Locomotion for Bipedal Creatures” by Thomas Geijtenbeek et. al.YouTube - Ex Machina - “Tear Up the F@cking Dance Floor” YouTube - Jurassic Park - Could vs. Should YouTube - #MMM3000 - Robotic Arm MK II Prototype YouTube - The Good Place - Janet Begs For Her Life (spoilers) Mashable.com - “Artist finds brilliant way to mess with facial recognition technology” Futurism - “This New Tech Can Copy Anyone’s Voice Using Just a Minute of Audio” The Royal Society Publishing - “Sleep macrostructure is modulated by positive and negative social experience in adult pet dogs” Wired Magazine - “Snopes and the Search for Facts in a Post-Fact World” Archive.org - The Human Condition by Hannah Arendt MIT Press - “Resisting Reduction: Designing our Complex Future with Machines” by Catherine Ahearn, Chia Evers, Natalie Saltiel, and Andre UhlNPR.org - “Lobbyists, Campaign Cash And Think Tanks: How Silicon Valley Tackled Politics” by Peter Overby BBC News - “Chinese man caught by facial recognition at pop concert” https://twitter.com/its_soup/status/1001147322162696193?s=19 NPR.org - “More States Opting To 'Robo-Grade' Student Essays By Computer” by Tovia Smith Science Alert - “Insane Clown Makeup Can Help You Dodge Facial Recognition Systems” Radiolab - Breaking News Discover Magazine - “Justice is served, but more so after lunch: how food-breaks sway the decisions of judges” (EDITOR'S NOTE: Apologies for the delay on this one's release; I started editing it a bit late in the week and was hindered by some technical hiccups and an episode that ended up a LOT messier than I remembered (also my fault). Sorry.)
There's been a democratization in tools & approaches to machine learning that we haven't seen in other fields, which allows smaller companies to punch above their weight class -- we're seeing this across the Initialized portfolio at the seed and pre-seed stages. We bet on the speedboats against the aircraft carriers: how Paperspace, Standard Cognition, and Voyage are letting their customers punch above their weight using ML. Full video: https://youtu.be/eHKURj6rrxo All about TNW Conference: https://tnw.to/conference
Русская кибернетика 298 • 7 марта 2018 • Автор и ведущий — Евгений Свалов (4Mal) 01. Chappano — Always [Suffused Music Promo, Initializing, Vol. 17, SMDVA025] 02. Eli Amsalevski & Elior Elimelech — Wanga [Suffused Music Promo, Initializing, Vol. 17, SMDVA025] 03. Anton Ishutin feat. Eva Pavlova – Flying (ID Remix) [Figura Music Promo] 04. […]
01. Chappano — Always [Suffused Music Promo, Initializing, Vol. 17, SMDVA025] 02. Eli Amsalevski & Elior Elimelech — Wanga [Suffused Music Promo, Initializing, Vol. 17, SMDVA025] 03. Anton Ishutin feat. Eva Pavlova - Flying (ID Remix) [Figura Music Promo] 04. Borshulyak — ID [Studio Exclusive] 05. Sergey Tkachev — Pyramid [SkyTop Promo, ST008] 06. glwzbll — joy [Russian Cybernetics Laboratory with Alexander Kireev] 07. Katrin Souza — You Sad Bro [Ghost Digital Rec. Promo, GDR010] 08. Eugene Schieffer — Marble City [Marble City EP, Electronic Tree Promo, ETREE267] 09. M0narch — 023 [313 EP, Microbios Rec. Promo, MB024] 10. Lezcano — The Green Mile [Retro Waves, Lincor Promo, LIN111] 11. Sanjar — Olga (Enlusion’s In Shadows Remix) [Sunstate Rec. Promo, SNS113] 12. Multimen — Flying Ship [Cartoon People Rec. Promo, CPR013] 13. Noel Sanger & Bruno Oloviani — Connected [SkyTop Promo, ST007] 14. Eugene Schieffer — Walls and Skyscrapes [Marble City EP, Electronic Tree Promo, ETREE267] 15. Sasha Bandit & 2ways — Eskimo [Eskimo EP, Heartbeat Rec. Promo]
01. Chappano — Always [Suffused Music Promo, Initializing, Vol. 17, SMDVA025] 02. Eli Amsalevski & Elior Elimelech — Wanga [Suffused Music Promo, Initializing, Vol. 17, SMDVA025] 03. Anton Ishutin feat. Eva Pavlova - Flying (ID Remix) [Figura Music Promo] 04. Borshulyak — ID [Studio Exclusive] 05. Sergey Tkachev — Pyramid [SkyTop Promo, ST008] 06. glwzbll — joy [Russian Cybernetics Laboratory with Alexander Kireev] 07. Katrin Souza — You Sad Bro [Ghost Digital Rec. Promo, GDR010] 08. Eugene Schieffer — Marble City [Marble City EP, Electronic Tree Promo, ETREE267] 09. M0narch — 023 [313 EP, Microbios Rec. Promo, MB024] 10. Lezcano — The Green Mile [Retro Waves, Lincor Promo, LIN111] 11. Sanjar — Olga (Enlusion’s In Shadows Remix) [Sunstate Rec. Promo, SNS113] 12. Multimen — Flying Ship [Cartoon People Rec. Promo, CPR013] 13. Noel Sanger & Bruno Oloviani — Connected [SkyTop Promo, ST007] 14. Eugene Schieffer — Walls and Skyscrapes [Marble City EP, Electronic Tree Promo, ETREE267] 15. Sasha Bandit & 2ways — Eskimo [Eskimo EP, Heartbeat Rec. Promo]
In this episode Brandon and James talk about the action order economy and how games handle the very practical issue of dealing with sequence that events happen. They touch on structures for making sure every player gets the spotlight, but also making sure it makes sense for the character mechanically. Finally they ask the big questions like “can I just take this initiative system and put it in another game”Games mentions in this episode:Masks: A New GenerationDungeons and DragonsMisspent YouthFate CoreMarvel Heroic RoleplayingEveryone Is JohnDungeon WorldTweet at us @StopHackandRoll or use #SHRpodFor more information about the podcast or either of the hosts check us out atStopHackandRoll.comTalk to us in our Discord at Discord.StopHackandRoll.comYou can support us financially at Patreon.com/StopHackandRoll.Music for the show isThere It Is Kevin MacLeod (incompetech.com)Licensed under Creative Commons: By Attribution 3.0 Licensehttp://creativecommons.org/licenses/by/3.0/
Discussion: This lesson covers one of the most fundamental of all programming concepts: Variables. This is a really exciting topic because once you have a handle on how variables work, you have one of the biggest keys to understanding how programming works. Specifically, we'll be discussing: Memory Data Types Declaring a Variable Naming Conventions Initializing a Variable What is a variable? Variables are a programming tool that help us store and recall information in our programs. Memory A microcontroller, like the one the Arduino uses, as well as computers in general, have something called memory. Memory is really handy because it allows us to store information for use at a later time. Let's say I'm working on a project that will monitor temperature during the day. I have a temperature sensor that reads the current temperature every 60 minutes from 1 am until midnight. I want the program to record the highest temperature and then display it at the end of the day on an LCD screen. In order for the program to accomplish this, it needs to store two key pieces of information. It needs to store the value of the current temperature, and then it also needs to store the value of the highest temperature that it has encountered thus far. But how do we actually save this information in a sketch? Furthermore, how do we recall it when we need to remember it? In order to do this, we need to use the memory. For now, think of memory as a big wall of lockers, and you can use the lockers to store something. When you need that something again, you just go back to locker and grab it. But how do you remember what locker you put it in? In order for us to do that, we first have to give the locker a name. That name you gave to the “locker”, the place where you’re storing your stuff, is called a variable. Now technically speaking, a variable is the named address of a specific location of memory. However, I don't want to get caught up in all of the technical stuff. I want to dive into the practical use of variables. Therefore, let's go back to this temperature project. As previously stated, we want to record the highest temperature during a 24 hour period. For our program, I need to store those two key pieces of information: the current temperature and the highest temperature. That means I’ll have to name two lockers. I’ll call one locker "Current Temperature", and I'll name another locker "Highest Temperature". Let's say my Arduino begins taking the first reading of the day. Maybe the temperature is 50 degrees. So I'll open the “Current Temperature” locker, and I'll put in the number 50. At the same time, I'll also open up the “Highest Temperature” locker. Right now there's nothing in it, but 50 is larger than nothing. Therefore, I'll put the number 50 in the “Highest Temperature” locker, as well. So now both of our lockers have the number 50 in them. After 60 minutes pass, I read the temperature again. Let's say it has raised two degrees to read 52 degrees Fahrenheit outside. I open up my “Current Temperature” locker, and I put in 52. This means that 52 overwrites the number 50 so that now the “Current Temperature” locker has the number 52 in it. I also peek inside the “Highest Temperature” locker. I see that 52 is hotter than 50. I go ahead and replace that also. I'm just going to repeat that process every hour. I open up the “Current Temperature” locker, replace the old value with the new value, and then check to see if I need to replace the temperature in the “Highest Temperature” locker. This reveals the first really important thing about variables and the most powerful thing about variables. The contents of a variable change. The name of the variable stays the same because the variable is just the container for the information. We don't want to confuse it with the actual information itself. The variable is the locker. It's not the actual stuff inside the locker. Let's recap what we’ve learned thus far. We need to store information, and we use memory to store it. We can think of memory like a wall of lockers. To use one of these lockers, we have to name it, and the name of the locker is called a variable. Once we have it named, we can put stuff in it and refer back to that stuff at a later time whenever we need it again. Again, the name refers to the location of the locker, not the actual content of the locker. Data Types There is another thing we have to do when we make a variable. We also have to say what type of thing we're going to put in it. This is called the Data Type. A good analogy here is to imagine that you have to build a zoo. You have to figure out where each animal is going to go in your zoo, and you have to make sure that each animal is given enough space so it can do its thing. For example, you'll need a bigger cage for a tiger than you will for an African frog display. If you're going to have an aquatic display, you'll need a bigger tank for a shark than you will for a goldfish. Where am I going with this zoo analogy? Here's the deal. You can't take a monkey and put him in a cage designed for fish. Likewise, you can't take a fish and put it in a cage designed for a tiger. It just won’t work. Variables are similar to this because you have to specify a data type for the variable. Maybe an example will clarify what I mean. Let's assume I have a variable, and I say, "This variable can only hold whole numbers." I can put whole numbers in that variable all day long. However, if I try to put a number like a fraction into that variable, I'm going to get an error. The reason is that I specified the data type for that variable to be whole numbers. I can't put a fraction into a variable that I've designated as a whole number variable. Declaring a Variable Creating a variable is called "declaring" it. To declare a variable, you need two things: a name and a data type. The data type comes first, followed by its name. One example of a common data type is an integer. An integer is a data type that can store a whole number from -32,768 to 32,766. Of course, you don’t need to memorize that. Just understand that a whole number is like 1, -5, or 18. It doesn't have a decimal point after it, such as the number 1.0567. In order to specify a variable as an integer data type, we use the abbreviation "int". The Arduino IDE recognizes all possible data types. Therefore, when you type “int”, it will conveniently change the color of the text for you automatically. Following the data type, we need to key in the name. There has to be a space between the data type and the name. You can name a variable almost anything you want, but there are some basic rules to follow. A variable name cannot contain any spaces or special characters, such as a pound sign, dollar sign, or percent. You may use numbers in a variable name, as long as the name doesn’t start with a number. Also, you can't use a keyword as the name of a variable. Keywords are special words that you will learn about later in the course. They're words that the Arduino IDE restricts for certain uses. Just like data types, the Arduino IDE will change the color of the text when you type a keyword. Thankfully, this means you don't have to know all the keywords right now. If you happen to type one, it’ll change color and will help you realize that you can't use that as a variable name. Naming Conventions Using these rules, how should we name variables? Even though you can name them whatever you want, there are still some naming conventions that are best to follow. The bottom line is that your variable names should be descriptive of what information they will hold. For example, if we wanted to save the current temperature in a variable called "mom", we could. However, it really wouldn't make that much sense. It'd be more logical to name that variable "currentTemperature". That way, if somebody else reads our sketch, they will have a basic idea of what information is actually in that variable. Notice how I wrote the word "currentTemperature". I capitalized the T in the second word temperature. This is called camelCase. It's simply a way to help distinguish the words in a variable name. You could also type "current_temperature" with an underscore between the two words. How you write the name of the variable is up to you. The important concept here is that this is called the "naming convention". It is a way to keep things standardized to make the code easier to read and easier to understand. Throughout the course you'll see me use a mix of camelCase and underscoring, depending on the context of the variable I create. Again, you're free to use whatever name you want, as long as you follow the rules we discussed. Initializing a Variable As mentioned before, when we are declaring a variable, we need the data type followed by the name. Then, at the end of that statement, we want a semicolon. Once we've declared a variable, it can now hold information. To put a value inside a variable, we use what is called the "assignment operator", which is simply just an equals sign. The first (or initial) time we assign a value to a variable, it's called "initializing the variable". We can actually declare and initialize a variable on the same line of code. Here’s an example: We have "int" for the data type and "currentTemperature"as the name of the variable. Next, there is the assignment operator, the equals sign. After that is the value to which we are initializing that variable. In this case, the initial value we are putting in the variable is 40. Lastly, we finish the statement with the all-important semicolon. If we want to change that value at some point later in the program, we just use the assignment operator again. In other words, we would type the variable name "currentTemperature", use the equals sign as our assignment operator, type the new value, and then end it with a semicolon. Review Let's recap this lesson. A variable is simply the name of a memory location. It's how we're able to store and recall information in our sketch. In order to use a variable, we have to give it both a data type and a name. The data type determines what we can put in a variable. Although you can use almost anything for a variable name, we did go over a few helpful rules and naming conventions. When we want to assign a value to a variable, we use an equals sign called the assignment operator. The first time we do this, it's called initializing that variable. Throughout the program, if we want to change the value of a variable, we simply type its name, assignment operator, and new value. That concludes this lesson. I know it's all kind of abstract right now, but these concepts will become more concrete as we move forward in the course. I look forward to next time where we'll dive more into data types and the like.
Today's Python 4 You looks at how you customize the initialization of a new instance in Python. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below: If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here. You can also watch it on YouTube: Tags: python, class
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