Flipping Bits

It is Sunday February 02, 2020 (02022020) and today’s date is a palindrome. Lunch yesterday was great. All the food my wife and I cooked turned out quite tasty. Today we will make a salad and sandwiches using a brioche bread loaf that we get at Trader Joe’s. We need to consume simpler and hopefully less food.

I decided to work on HackerRank Flipping bits problem. I decided to use Java 8. The problem has to do with bit manipulations. In my humble opinion, C is a much better suited language than Java. Continue reading “Flipping Bits”

Promise and Async in C++

In the past couple days I have been trying to get up at 06:00 AM instead of 05:00 AM. It is not working yet. Today I woke up around 04:30 AM, checked the time in my phone and decided to get up. Read a few articles of which two called my attention the most.

In Israel, Intel’s Mobileye has been testing an autonomous car that makes use of 12 cameras. Their software has ability to connect to RADAR and LIDAR but they have been driving the car in the city of Jerusalem. The video shown at CES show in Las Vegas looks pretty good. I agree with Elon Musk’s idea that an autonomous car should not require LIDAR. That said how many cameras and their position would be critical for success. I believe most humans only use their two eyes (one stereo camera) to drive vehicles. Of course humans have a very powerful computer which at this time we know little about how it works. Given time, I believe autonomous cars will use a limited set of cameras and newer and more powerful algorithms to allow them drive in most traffic and road conditions. Continue reading “Promise and Async in C++”

Threads and Templates C++

It is Saturday morning. Last week my wife was going to have over two of his brothers and spouses but she was not feeling well so lunch was postponed for today. After breakfast I made the dough for the spinach scacciata. It is resting in a bowl. After my second and last 2-hour block I will check out the dough.

We are missing fresh mushrooms for the chicken Marsala. My wife and I will be heading out to Trader Joe’s to pick up some last minute items we need for lunch and the upcoming week. Continue reading “Threads and Templates C++”

Creating Threads in C++

This week seems to be flying by. It is already Wednesday.

On my last post I mentioned that I get up around 05:00 AM every day of the week. I prepare and have breakfast, shower and get dressed, and go down to work around 06:00 AM. By the time I go to sleep around 07:30 PM, I am pretty tiered.

So what happens if something comes up around 05:00 PM CST at work? The company I work for is in California. That implies that it is relatively early in the afternoon at 03:00 PM PST. If urgent I will take a look and then address it on the next day. This is because at 05:00 PM CST I am fried. Since I wake up at 05:00 AM CDT, which is considerably early on the west coast (03:00 AM PST), I have plenty of time (about 5 hours) to get things done before people starts arriving around 09:00 AM PST. Continue reading “Creating Threads in C++”

Porting MD5 Code

Last week my wife and I returned from a one week trip to Portugal. We had not been there in more than a decade. Some things have changed while other not. People continue to be very nice and helpful especially when you attempt to utter a few words in Portuguese.

We arrived in Lisbon and headed to the rental car office. In less than an hour from arrival we were heading south to the Algarve. We have watched a few YouTube videos by Rick Steves and had purchases one of his travel guides for Portugal. In more than one occasion Rick has mentioned that Salema is his favorite beach in the Algarve. By experience we now know why. It is a small town sitting on a relatively small bay with blue and green waters. The population is less than 300 people. My wife took a picture at a restaurant on the beach while the temperature was hitting 96 F and we were enjoying delicious fresh sea food and drinking Sagres beer. From our table we could hear people conversion and different languages. Our waiter was taking care of a few tables and was able to switch to the language spoken by the customers (English, French and German). We only spent two days and headed back to Lisbon. Continue reading “Porting MD5 Code”

C++ Boost Library Visual Studio 2017

Yesterday I spent time attempting to port a C DLL that I wrote some time ago to generate MD5 digests for a storage server. At the time I used as a base code provided by RSA Data Security, Inc. and designed and implemented a set of functions that could be directly called in applications / servers that would require generating MD5 digests for strings and files. When done I package the results into a DLL. The library has been in production for a long time. I used the C programming language for performance and the code was built for 32-bit processors. Continue reading “C++ Boost Library Visual Studio 2017”

Tidbits – Streams in C++

If you have watched Red with Bruce Willis you may recall the opening scene. Frank Moses (Bruce Willis) is a retired CIA operative and he is sleeping in his bed. On the night stand next to him there is a clock. The clock is ticking down to 06:00 AM. Just as the clock reaches 06:00 AM, without the need of an alarm, Frank Moses wakes up and calmly walks down to the kitchen to get breakfast. Obviously Frank Moses is a very disciplined and a morning person. Continue reading “Tidbits – Streams in C++”

BST Diameter

Earlier this morning I read a post “Binary Tree: The Diameter” by David Pynes. The post showed up on Medium but was initially written for Towards Data Science. After quickly reading the post I decided to spend time reading the article in my computer, thinking about it and writing a solution in Java. The original article used C++. Continue reading “BST Diameter”

C++ Tidbits – Polymorphism

Good morning. It is a relatively cold Saturday in the Twin Cities. For some reason, this winter season has been warmer than usual with very little snow coverage. For example, today the high temperature will be around the freezing point. Some people (like me) like it while others hate it. There is no way to please everyone at once.

In an attempt to review in a systematic way some features of C++ I will be experimenting with polymorphism. In programming languages and type theory, polymorphism is the provision of a single interface to entities of different types or the use of a single symbol to represent multiple different types. To read more about it you may refer here.

Continue reading “C++ Tidbits – Polymorphism”

C++ Tidbits – Inheritance

I am about to complete a course on Neural Networks and Deep Learning. I am amazed at how one gets absorbed into the subject and language (in this case Python). Lately when I am working with C, C++, Java or Python I occasionally use a syntax from a different language.

In this post I will be covering / reviewing Inheritance using C++. Many years ago when I wanted to review C I would pull from my bookshelf the book “C Programming Language” by Brian Kernighan and Dennis Ritchie. During the years I have owned several copies. A few minutes ago I tried to locate my latest copy, but it seems that it grew legs and walked away. For C++ I have … (I guess I have also misplaced it) a book by Bjarne Stroustrup. Given the fact that I want a quick refresher, decided to go over an Advanced C++ Programming course by Mike McMillan. For this post (and a few more that I will write in the next few days) I am using this course as a guide and will be coding C++ on Visual Studio 2017 from Microsoft. Continue reading “C++ Tidbits – Inheritance”