2020-09-21 14:00
Have you gotten into a situation where it was hard to keep track of what is wrong with your loop because the loop either runs forever without terminating or it gives results that were not ex… Read More
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Solving It? Blog
emekadavid-solvingit.blogspot.com
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My blog shows how science solves human problems in scientific and social settings, with an emphasis on common and general issues.
2020-09-19 14:55
While going through a Reddit group post on python recently, I saw a question that was similar to the element uniqueness problem and the way the answer was formulated struck me as odd. I thou… Read More
2020-09-17 13:27
Python provides for ways we can emulate the native data structures in our own defined classes. In this post, I will show you one way you can emulate a list. A list is a mutable sequence that… Read More
2020-09-16 16:12
Recently, it was reported in the media that phosphine has been discovered in the acidic clouds of planet Venus. According to scientists, phosphine is a biosignature for life; that means it c… Read More
2020-09-16 13:18
In python, operator overloading means giving an extended meaning to an operator beyond its native meaning. An example that comes to mind is the + operator. You must have noticed that it has… Read More
2020-09-15 17:20
The pillar of modular programming in python is the module. A module, in its simplest form, is any script that has the .py extension attached to it. Each of these files has classes, functions… Read More
2020-09-15 13:27
The notion of abstraction comes from the ability to distil a complicated system into its component parts or fundamental parts. It involves hiding the complexity and showing only the fundamen… Read More
2020-09-14 16:35
XML, or extensible markup language, is a markup language defining a set of rules for encoding documents such that they can be both human-readable and machine-readable. The World Wide Web Con… Read More
2020-09-11 13:32
Let’s take a philosophical bent to our programming and consider something related to research. I decided to consider regression to the mean because I have found that topic fascinating… Read More
2020-09-10 17:17
Sometimes while programming, in order to prevent having side effects when we want to change an object, we need to create a copy of that object and mutate the copy so that we can later use th… Read More
2020-09-10 13:07
One of the ubiquitous and most often used functions in python is the python print function. We use it for realizing the output of our codes and even for debugging. So, it is pertinent that w… Read More
2020-09-09 16:20
Deterministic processes are what every programmer is familiar with when starting out in their journey. In fact, most beginner books on programmer will teach you deterministic processes. Thes… Read More
2020-09-09 13:20
Polymorphism is a concept you will often find yourself implementing in code, especially in python. Polymorphism means essentially taking different forms. For example, a function implementing… Read More
2020-09-08 16:24
Inheritance as a concept refers to the ability of python child classes to acquire the data attributes and methods of python parent classes. Inheritance occurs many times in programming. We m… Read More
2020-09-08 13:57
Computer scientists are continually refining how they write programs. Therefore, they have resorted to several methodologies to do so. Object Oriented Programming (OOP) is a popular methodol… Read More
2020-09-07 16:28
Have you ever wished you had a device in which the battery never runs out, or have you ever wanted one day to put an end to all the sustainability issues caused by batteries landing up in la… Read More
2020-09-07 13:30
This post is related to two previous post. First, the original post on the 0/1 knapsack problem where I explained how this can be solved using a greedy algorithm that doesn’t promise t… Read More
2020-09-06 16:56
Imagine that you touch a hot stove, how do you perceive that the stove is hot and that you should withdraw your hand? In other words, how did you feel the pain? Doctors tell us that when the… Read More
2020-09-06 13:06
The python pow() function, most times called python power function, is a built-in function for calculating the power of a number when raised to an exponent. It comes in very handy several ti… Read More
2020-09-05 13:54
HTML, also known as Hypertext Markup Language, is used for creating web pages and is a standard markup language. If you have ever seen the code of any website or blog, you most probably was… Read More
2020-09-04 16:35
Dynamic programming is a programming method that aims to optimize solutions to problems. It was developed by Richard Bellman in the 1950s and has since become popular. In dynamic programming… Read More
2020-09-04 13:14
Imagine you want to loop over some numbers that is defined by a sequence. What do you do? Start creating the list of numbers by hand? Nope, not in python. Python provides a convenient data t… Read More
2020-09-03 18:29
Graph traversal (or graph search) is an important concept in computer science and programming. It refers to the process of visiting each node or vertex in a graph and checking or updating th… Read More
2020-09-03 13:09
When we write code we often have groups of related statements clustered together. It would be bad practice to continue repeating those statements. Good programmers group them together in a f… Read More
2020-09-02 16:19
Most times we want to understand what file sizes our data has. For example, when the file sizes are stated in bytes, we would want to understand what are the stated unit is in kilobytes, or… Read More
2020-09-02 13:52
Very often we have a long string and we want to split it. As programmers we encounter this situation often. Python has a method built in to the string data type, the python string split meth… Read More
2020-09-01 16:30
Because there was a huge response from readers towards the email validity check and Roman numerals validity check algorithms I wrote using python regex, I decided to write another common pla… Read More
2020-09-01 13:45
Sorting in programming is very important. It can improve the efficiency of your code. For example, if you have to search for an item in a collection, the ability to sort the items beforehand… Read More
2020-08-31 16:34
In computer science and mathematics, graphs are ubiquitous. They are just everywhere. We use graphs to solve a lot of problems that involve relationships. Since 1735 when the Swiss Mathemati… Read More
2020-08-31 13:12
After writing the post on reversing lists in python, I got a good response that I decided it would also be fine if I approach a similar concept in python: how to reverse a string in python… Read More
2020-08-30 15:17
When a narrowed aortic valve fails to open properly and thereby the pumping of blood from the heart to the aorta is obstructed, this might result in a condition called aortic valve stenosis… Read More
2020-08-29 18:02
Very often I get people asking me to write a post on how to reverse a list in python. This is because this question often comes up in interviews. So, to oblige them, I have decided to write… Read More
2020-08-29 13:57
When I wrote a post about an idea I had at a bank about making change from $5 and $8, a reader wrote me that this was the knapsack problem. I decided to research it. I discovered that althou… Read More
2020-08-28 16:37
Let’s imagine this scenario. You are a fund manager who is in charge of several stocks. Your company has given you about 20 stocks to evaluate and asks you to find out what 5 stocks fr… Read More
2020-08-28 13:33
Although it has been said several times that the future of nanoscale technology with nanobots is immense, each day researchers continue to expand it. Recently, in a first of its kind, a Corn… Read More
2020-08-27 17:09
Very often, we want to apply a function to an iterable without using a for loop. We saw an example in the python reduce function but the python reduce function doesn’t really fit want… Read More
2020-08-27 13:39
Python List comprehension, sometimes called listcomps, and generator expression, (genexps), were a notation inspired by the programming language, Haskell. Their aim is to make code more comp… Read More
2020-08-26 17:28
Directories and files are crucial to a programmer who wants a resource for his programs. That is why it is necessary after discussing python’s file handling methods, one should also un… Read More
2020-08-26 13:19
Computer files, or resources for recording discrete data, are usually ubiquitous in python. File handling in python treats files as either textual or binary files and there is no limit to th… Read More
2020-08-25 16:32
Accumulators have a notable reputation in computing history. The earliest machines by Gottfried Leibniz and Blaise Pascal were based on the concept of accumulators. If you are familiar with… Read More
2020-08-25 13:11
Python regex, or sometimes called python regular expressions, are expressions written in python that are made to match a specific pattern in a string. They are a widely used feature in the w… Read More
2020-08-24 17:42
How you format your text is important in text processing and python is not left out, giving you several options to make your output appear presentable. I decided to delve into the issue of p… Read More
2020-08-24 17:20
In an earlier post, I showed how to use field names and conversion fields to format values in replacement fields. Today, I will continue that discussion by showing how to use format specific… Read More
2020-08-23 16:52
Travelling at a speed of 186,000 mi/s, light can be extremely fast. Even Superman, the fastest creature on Earth, cannot travel at the speed of light. Humans have shown several times that th… Read More
2020-08-22 17:58
In a post this week, while discussing control flow in python, I wrote about repetitive control structures in python which consist of the python while and for loops. But I received some text… Read More
2020-08-22 13:52
Today, we will be cracking codes with python. While researching on this post, I came up on an article about Caesar’s cipher. Caesar’s cipher is a means of encrypting messages usi… Read More
2020-08-21 16:49
It was recently reported that the Russian opposition leader, Alexei Navalny, was in coma from suspected food poisoning. That was a disturbing news that made me start thinking of how to crea… Read More
2020-08-21 13:23
In my post on python iterators, I mentioned that one limitation of using python iterators in user defined objects is that they do not allow you to have more than one pass at the iterator whe… Read More
2020-08-20 17:13
Lots of times when I read code, I see people thinking that python iterables are just about python sequences like python lists, tuples, or strings. The most culprit are python lists. When the… Read More
2020-08-20 16:50
In the last post about python iterables, we discussed what it means to be an iterable – being able to participate in the for loop and implementing the __iter__() method to create itera… Read More
2020-08-19 13:23
The last post discussed on the use of the python if else, and elif statements as part of a selection control structure. Today, the second part, we will discuss on repetition control s… Read More
2020-08-18 17:27
We all need to make decisions. We decide on what to eat, what to wear, what to learn, or where to work. Computers also make decisions; at least, the decisions we code. You designate w… Read More
2020-08-18 13:26
There is a built-in function in python that is versatile. It can be used to measure the number of items or length of any object. That function is the python length function. It is denoted as… Read More
2020-08-17 17:41
How does the brain interpret what we see and how can computers be made to mimic the natural workings of the human brain when it comes to sight? That is the question that computer vision tech… Read More
2020-08-17 13:23
According to the documentation, comparing sequences is done based on lexicographic order. That is just a way of saying that comparisons between sequences are done based on their position in… Read More
2020-08-16 16:28
Public health officials have launched a protracted campaign to make us believe that wearing a face mask prevents the spread of Covid-19, the latest pandemic. But is this true? That was the q… Read More
2020-08-15 18:08
How many times have you ever wanted to loop through a list or tuple while keeping count of the number of times and you ended up doing it with a for-loop? For beginners, I think the an… Read More
2020-08-15 13:19
In an earlier post, I discussed on how to remove items from python lists. Today, we will expand on the concept of lists and python list functions. We will be discussing on how to add items t… Read More
2020-08-14 16:43
Human activity has been impacting the environment in negative ways. The greenhouse effect which produces climate change due to the trapping of the sunlight energy in the atmosphere is caused… Read More
2020-08-14 13:48
No code is perfect. No matter how expert you are at programming, once in a while an error will occur. For beginners, this is more common. One area of errors that beginners encounter are synt… Read More
2020-08-13 17:19
In python, a list is an ordered sequence of elements that is mutable, or changeable. Each element in a list is called an item. Although the types of items in a list can vary, most times you… Read More
2020-08-13 13:42
Yesterday, we explained in depth some of the functions that are included in the random module in python. Today, we will be applying that knowledge to build a simple guessing game. This is ho… Read More
2020-08-12 18:31
When people think of random numbers, they think of something disorganized and that cannot be predicted. That is what I thought until I entered the world of random numbers using python… Read More
2020-08-12 13:49
Programming to be honest is not easy. It can be hard especially when you are stuck in a problem, or even when you have a bug and you don’t know a way out of it. I once wrote a project… Read More
2020-08-11 18:14
For a long time scientists have been fascinated with one problem when it concerns blades. Although blades are made of stainless steel and have edges that are razor-sharp, to further strength… Read More
2020-08-11 14:01
Any discussion on regular expressions, or regex, is not complete without taking note of the lookaround assertions. Lookaround assertion in regex are assertions that state that at the current… Read More
2020-08-10 19:34
A typical recycling process involves the following – waste is collected, sorted, cleaned and processed, then the processed waste is used to manufacture more of the same product, and th… Read More
2020-08-10 14:34
Sometimes while doing maths, we are faced with converting from one base to the other. Python is good for occasions like this. That is why I love programming in python. In this post, I will d… Read More
2020-08-09 15:36
When Fitbit first came into the market I was wowed. I told myself that was cool. I could track all sorts of things about my health and performance. Along with Fitbit came a host of other gad… Read More
2020-08-09 12:16
I recently went to the bank to withdraw some money. The attendant at the ATM told me the ATM can only give out money in 1,000 naira and 500 naira notes. When he told me, I started wond… Read More
2020-08-08 14:43
I encountered a problem recently of how to check for email validity. When doing web scraping or handling data sets, you get to play with emails a lot and having a handy function that does th… Read More
2020-08-08 12:11
For centuries, people have been searching for ways to keep information from getting into the hands of the public. Cryptography gave them an answer to that. Cryptography has been used, both i… Read More
2020-08-07 15:50
Regular expressions, or regex, in python is fun. It is a very fast way to search through a string for a given pattern. Whenever I have to search and I am dealing with a string, the first thi… Read More
2020-08-06 20:30
Brain-computer interfaces (BCI) or what some call the mind-machine interface is a system of connecting a human brain through wires or wirelessly to a machine in order to generate signa… Read More
2020-08-06 14:45
It is a little daunting for people who are new to python or
transitioning to python from other languages to understand how keyword
arguments work when compared to positional arguments. I wil… Read More
2020-08-05 22:02
The cerebellum, which in Latin means “the little brain,” is
at the hindbrain in all vertebrates. North of the cerebellum is the cerebral
cortex which forms its outer layer. Forme… Read More
2020-08-05 16:44
Have you ever got stumped when you tried assessing an item in a list or dictionary because you received a result which you never expected? Some would say they found a bug. Truly, that bug re… Read More
2020-08-04 14:16
Have you ever wondered how to do things the easy way when dealing with strings? Maybe you want to match some strings and you get stomped.
For example, take this hackerrank.com challenge. Th… Read More
2020-08-04 07:59
In this article, I will show how you can use the map and lambda function. We will be using a Fibonacci sequence to demonstrate this. The task we will be carrying out is to produce a Fibonacc… Read More
2015-04-28 21:33
Often, we find ourselves saying or doing things that we’d regret later. When an act or speech is not acceptable in relationships, business contracts, religious gatherings etc because i… Read More
2015-04-27 21:17
On Wednesday, April 22, Calbuco Volcano in Chile erupted. The last time it did so was in 1972, about 42 years ago. Thousands of people have been evacuated from Ensenada, a town in the foothi… Read More
2015-04-24 20:10
Education should provoke critical thought for the learning process to win. Technology should enhance teacher proficiency for easy adoption. Education should be an active process. Technology… Read More
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