Amanda Roos

About my journey so far: I created my OpenSea account about two weeks ago. It cost me about $100 to get started: $20 in transaction fees to get Etherium into my MetaMask wallet and then about $80 in Etherium gas fees to create my first collection. I used this website to watch gas prices for a couple of days to see when gas prices tended to be lowest: https://ethgasstation.info/ Since then I have been uploading a few panda NFTs every day. I have been working on my 1000 pandas project, so I have almost 100 panda images as a backlog ready to upload as NFTs. Once I've caught up with my backlog I will create the NFTs as I create the pandas. When I create an NFT, I have been creating a supply of 1000 for each item (add "?enable_supply=true" to the end of the create URL to be able to change the supply of your OpenSea NFTs). When I finally finish making all 1000 pandas and making 1000 NFTs of each, that will end up being 1 million panda NFTs! I did this so I could experimen...

Time for some app stats! My newest app, Time Progress Bars, was released on the Google Play Store in October 2020. Total downloads - 784 Active downloads - 446 Revenue - $12.75 My share of revenue - $8.92 The app has translations for 100+ languages. About half of the downloads are from non-English-speaking countries. I'm not running ads in this app. All revenue is from an in-app purchase that lets users change the color scheme.

  On Google Play:  https://play.google.com/store/apps/details?id=com.amandafarrell.timeprogressbars A fun way to visualize time Includes a resizable home screen widget Available in over 100 languages Inspired by one of my favorite Twitter accounts:  https://twitter.com/year_progress

  Kotlin code on GitHub:  https://github.com/amandafarrell/LatLong Get the app on Google Play:  https://play.google.com/store/apps/details?id=com.amandafarrell.latlong -Uses Google's location API to display Latitude and Longitude coordinates -Coordinates make take a minute or two to update when refreshing -Available in 100 languages

I'm working on an app that shows time progress bars. I wanted the minute progress bar in this app to tick up 1% at a time. I knew that with 60000 milliseconds in a minute, this meant that updating the progress bar every 600 milliseconds should do the trick. My calculations weren't originally precise enough, however, and you can see that before the progress bar would skip 1-3% instead of 1% at a time. This was because I was doing calculations with seconds as an Int. After I switched to doing my division with Longs instead of Integers it worked great! Code on GitHub: https://github.com/amandafarrell/TimeProgressBars

Java code on GitHub:  https://github.com/amandafarrell/VolumeButtonCounterFree Available on Google Play:  https://play.google.com/store/apps/details?id=com.amandafarrell.www.volumebuttoncounterfree -Use volume buttons to count up and down -Can reset to any number you choose -Available in 100 languages

Java code available on GitHub:  https://github.com/amandafarrell/ChangeCalculator Available on Google Play:  https://play.google.com/store/apps/details?id=com.amandfarrell.www.changecalculator -Quick number entry -Shows amount of bills and coins -Available in 100 languages

I receive a lot of reviews of scorekeeper asking for the ability to edit the names of players, which is a feature already available through long-pressing on the player name. Apparently, long-pressing is not something intuitive to try for some people, so they are left without the ability to change the player name. I hope this video preview helps make it easier for users to understand how the app works and how to get to additional features already available to them.

I released Scorekeeper, my first app, on the Google Play Store three years ago. It recently reached 50,000 downloads! I'm excited something I made could be useful to so many people and hope I can keep making more and better apps going forward.

Let's say we have some magical rabbits. These rabbits never die. A pair of rabbits has 3 more pairs of rabbits in every litter, and they start producing litters after one generation. If you start with one pair of rabbits, how many rabbits will you have in 5 generations? This was the premise of a problem I was working on this week in Python (check out the full problem here:  http://rosalind.info/problems/fib/ ). I had to draw it out on my white board to wrap my head around it: The idea behind this problem is that finding the number of rabbits in a given generation is similar to calculating a given number in the Fibonacci sequence and that it can be solved recursively, so that's how I did it. Recursive rabbit solution: It doesn't really have to be done recursively, though. I was talking through it with Steven, and we realized that the manual approach I had used on the whiteboard was also fairly efficient. Turns out it can be implemented in fewer lines of cod...

I've been taking the Data Structures & Algorithms in Python class on Udacity.com. Lately, I've been working on implementing an in-place Quicksort two different ways.  The first way follows the way they explained it in the class video . This version involves moving the pivot after each comparison: The second way is based on a visualization they linked to from the lecture and this tutorial . It moves the pivot after all comparisons for each partition have been made, eliminates the need for the "j" variable that I have in the first version, and is a few lines shorter than the first version, but it is harder for me understand intrinsically: