Fraudulent Activity Notification

Good day software developers and engineers. Hope your day is going well. The days are getting shorter and colder in the Twin Cities of Minneapolis and St. Paul.

As usual, my wife fixed lunch. It was quite good. Some type of meat stew. For desert we had `gypsy’s arm`. If interested in this dessert please read the article “Gypsy’s Arm Explained“. My wife has been making this desert since we were dating. At some point she used a single can of `dulce de leche`. In the past couple years she is been using two cans. That makes for a much better dessert. Please do not confuse `dulce de leche` with `tres leches cake`. They are completely different things. Continue reading “Fraudulent Activity Notification”

Java Date and Time

It is a sunny day in the Twin Cities of Minneapolis and St. Paul.

Earlier today I read an article on Medium that described how bad are the crypto currencies and which actors are making money of it. I missed to bookmark the article. While writing this post, in an attempt to locate the article, I did a Google search using the following string: “medium crypto currency”. It returned several articles. I did not spend the time looking for it. That said; if you are investing on crypto currencies, perhaps it would be a good idea to read some of the articles that have reasons why you should stop doing so. That said, I have invested a few dollars on crypto currencies. My reasoning was to better understand what Bitcoin, among other crypto currencies is all about.

Today is the birthday of the wife of one of my wife brothers. We are invited later this afternoon. Hopefully the weather will hold. It is nice to attend a BBQ on a sunny day.

Today and for a few more days, I will attempt to solve some problems in HackerRank. In the past couple years I have concentrated on solving problems from LeetCode. Continue reading “Java Date and Time”

Longest Palindromic Substring

Good day! Hope your day has started on the right note. The days are getting shorter. Every morning after breakfast my wife and I head out for a 2.5 mile walk. We are leaving home a few minutes before 07:00 AM because earlier is dark. We prefer walking with day light. Continue reading “Longest Palindromic Substring”

Database Sharding

Good day software developers and engineers. Today is Wednesday and it seems it is going to be a sunny day in the Twin Cities of Minneapolis and St. Paul. Hope the weather cooperates in your neck of the woods.

I continue to read and experiment with the contents presented in the on-line course Introduction to Python Fundamentals: Lesson 02 by Paul Deitel published by Pearson Education, Inc. As a matter of fact, tomorrow I will start with lesson 03. So far I am pleased to be reviewing and learning new things during the process. Continue reading “Database Sharding”

Introduction to Python Fundamentals – Lesson 1

It is Thursday morning in the Twin Cities of Minneapolis and St. Paul. Even though we are still officially in summer, the highs and lows for the days are going down. Hopefully we will have at least two more months of decent weather to walk outside.

As I mentioned in the last posts, we are going to start solving problems in Python. According to the PYPL Index, for results collected in August 2021, the most popular programming language is Python with a share of 31.47%. Java is second with a 19.14% share.

According to the IEEE Spectrum article “Top Programming Languages 2021 Python dominates as the de facto platform for new technologies” Python is number 1. I guess it is time to start solving problems in Python. In our next post I will start solving easy problems. We will then progress to medium and hard.

As you might already know, I like to refresh on tools I will be using. I decided to start watching “Introduction to Python Fundamentals: Lesson 01” by Paul Deitel published by Pearson Education, Inc. Since I am a member of the ACM (https://en.wikipedia.org/wiki/Association_for_Computing_Machinery) I have access to O’Reilly titles. If you work developing software, I strongly recommend you joining the ACM. They provide a wealth of information at your fingertips. For example, earlier today I attended the webinar “Quantum Computational Supremacy” by Scott Aaronson. I do not work with quantum computers, but enjoy learning about the technology. If you have a chance, watch the recording of the webinar which should be available in a few days.

Continue reading “Introduction to Python Fundamentals – Lesson 1”

Memory Pools – O(1) Storage

Happy Tuesday! Hope you had a nice long weekend. Labor Day in Minnesota marks the official summer season. The Minnesota State Fair ended yesterday. It flags the start of public schools and public universities in our state. In general, private schools and universities start a few weeks earlier.

My wife and I did not have too many things to do over the long weekend. Pretty much we did some grocery shopping, walking, and cook meals. We did watch on Amazon Prime an interesting and somewhat older movie. Trumbo was released on DVD in September 15, 2009. The movie provides interesting facts about the Hollywood Blacklist. It describes interesting and dark moments for liberty and freedom in the USA. Hopefully we have learned something and it will not repeat. The black list has nothing to do with African Americans. These events are associated with white people that disagreed with the main stream ideas of the time. The movie starts in 1947, a few years after the WWII ended. When you get a chance spend a couple hours watching this movie.

On a separate note, this post has as of right now 9,037 subscribers. Thank you very much!!! Continue reading “Memory Pools – O(1) Storage”

Memory Pools – Revisited

It is Friday morning. The day started with a thunderstorm and some rain. After breakfast the storms were done. Last Thursday afternoon we had powerful storms with lots of rain. Some roads in the area had about two inches of water during the storms. Cars on roads were splashing water all over. I did not hear about accidents. That was good news!

After my first 2-hour block I sat with my wife and chatted for a few minutes. We were discussing the fact that for most people their normal state does not reflect happiness. It is a shame because such state just builds on itself and continues to spiral downwards. We try to be approachable both at home and work. People like and appreciates such behavior. Continue reading “Memory Pools – Revisited”

What is Blockchain?

Good day gals and guys! Hope you are doing well on this sunny Friday morning. I have not been generating new posts for a few weeks. Sorry about that. I was on holiday for a couple weeks and then had my second and final elective surgery. I wanted to get it in before the next COVID-19 wave shows up. Continue reading “What is Blockchain?”

Flatten a Multilevel Doubly Linked List

Good morning software developers and software engineers! Hope your day has started on the right note. Every morning, weather allowing for it, my wife and I have breakfast and go for a brisk walk. Today was no exception. Before 08:00 AM I have watered plants in the yard including a rosemary bush that we planted a week ago or so, showered, shaved, got dressed and started my work day. It is amazing how well you feed during the day once you have exercised, no matter how short or long.

Last week I read the article (let me see if I can find it in my Twitter account @john_canessa … found it) Cybersecurity bills gain new urgency after rash of attacks. It seems that both political parties, Democrats and Republicans are pushing a bill that will help our country against cyber attacks. In the past few months we have seen hundreds if not thousands of attacks, some to disable our government, companies and organizations or to ask for ransom. One of the proposed ideas is to force targets to disclose in a short period of time (24 hours or so) any cyber breach they have experienced. This will allow the government and other organizations to take action as needed to prevent the same type of attacks. In my opinion there should be some type of penalty for the bad actors in an attempt to curb their proliferation (transparency and accountability). Will see what happens with the bill and its implementation! Continue reading “Flatten a Multilevel Doubly Linked List”

Unique Binary Search Trees

It has been raining all day in the Twin Cities of Minneapolis and St. Paul. The good thing is that there has been little lightning. I was going to replace an old UPS that I am using to power my main computer in which I develop all the code for this blog, but it was not necessary. I will replace the UPS over the weekend. Continue reading “Unique Binary Search Trees”