Blockchains penetrate into every single field in computer science. Fields such as borrowing, lending, web3, crypto gaming, NFTs, DAOs, trading — to mention just a few — experience a rapid growth in recent years. Both developers and users flock to decentralized, open, permissionless protocols: Blockchains. The exploding interest in Blockchain development brings opportunity to coders … Read more
Normal distribution is a statistical prerequisite for parametric tests like Pearson’s correlation, t-tests, and regression. Testing for normal distribution can be done visually with sns.displot(x, kde=true). The Shapiro-Wilk test for normality can be done quickest with pingouin‘s pg.normality(x). 💡 Note: Several publications note that normal distribution is the least important prerequisite for parametric tests and … Read more
A good solution to calculate Pearson’s r and the p-value, to report the significance of the correlation, in Python is scipy.stats.pearsonr(x, y). A nice overview of the results delivers pingouin’s pg.corr(x, y). What is Pearson’s “r” Measure? A statistical correlation with Pearson’s r measures the linear relationship between two numerical variables. The correlation coefficient r … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to import a Python script into another Python script. To make it more fun, we have the following running scenario: Your boss at the Finxter Academy has asked you to create five (5) customized login greetings for their users. To keep your code clean, … Read more
Summary: The most straightforward way to remove an element at a given index from a NumPy array is to call the function np.delete(array, index) that returns a new array with the element removed. Problem: Given a Numpy Array; how to remove specific elements from the Numpy array? Example: Consider the following Numpy array as shown below: Challenge: How will you … Read more
We’ve written a series of guides on income and opportunity in various fields related to information technology, programming, computer science, and tech. Developer Jobs (Alphabetically) Feel free to check out our tutorials about these exciting industries: Job Title More Info (URL) .NET Developer https://blog.finxter.com/net-developer-income-and-opportunity/ ABAP Developer https://blog.finxter.com/abap-developer-income-and-opportunity/ ActionScript Developer https://blog.finxter.com/actionscript-developer-income-and-opportunity/ Ada Developer https://blog.finxter.com/ada-developer-income-and-opportunity/ AJAX Developer … Read more
What is an eCommerce Developer? eCommerce website developers create websites for online businesses on which customers can purchase electronic or physical goods. eCommerce developers are web developers with a special focus on the infrastructure technology around payments, product shipping, taxing, reporting, and tracking & increasing conversion. What eCommerce Frameworks do eCommerce Developers Use? These are … Read more
What You Need to Know Before You Begin I was trading forex bots long before I started learning Python. When I look back on the experience, I wish I had done it in reverse. There are three basic reasons: Learning to code with Python is easier. I know it’s hard to believe, but it’s true. … Read more
What is an eLearning Developer? The eLearning developer is responsible for the technical implementation and deployment of the learning material created by, for example, an instructional designer or teacher. This involves activities such as setting up an eLearning system or course management system, creating code for interactive exercises or quizzes, and taking care of the … Read more
Problem Formulation Problem: Given a Pandas DataFrame; how to change the strings in the DataFrame to lowercase? Example: Consider the following Pandas DataFrame: Output: Expected Output: When you change a pandas DataFrame string column to lowercase, then the column is returned such that every string in the column is converted and displayed in lowercase while any non-alphabetical … Read more
This is part 7 and a continuation of the Smart Contract Security Series. Ownership Exploit Private Variable Exploit Reentrancy Attack tx.origin Phishing Attack Denial of Service Attack Storage Collision Attack Randomness Attack Replay Attack In this tutorial, the randomness attack or also called replicated logic attack is analyzed. The problem in Solidity contracts is finding … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to find the 2nd largest List element in Python. To make it more fun, we have the following running scenario: Rivers Clothing is currently reviewing its projected earnings for the next six (6) months. As their IT Specialist, you saved this data in a … Read more