programming

Text I/O vs. Binary I/O

Text I/O vs. Binary I/O

Binary I/O does not involve encoding or decoding and thus is more efficient than text I/O. Computers do not differentiate between binary files and text files. All files are stored in binary format, and thus all files are essentially binary files. Text I/O is built upon binary I/O to provide a level of abstraction for character encoding and decoding, as shown in Figure below (a). Encoding and decoding are automatically performed for text I/O. The JVM converts Unicode to a file-specific encoding when writing a character, and it converts a file-specific encoding to Unicode when reading a character. For example,…
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Split & Group Text and Perform Distinct on Each Group

Split & Group Text and Perform Distinct on Each Group

Problem description & analysis: Below is an irregularly categorized detail table. Column A and column B are categories and both have duplicate values. Column C contains detailed data consisting of strings separated by "comma+space", and there are duplicates among the string values. Task: Split detail data in each category, group them by category, get unique values of each group, and concatenate them using "comma+space". Solution: Use SPL XLL to enter the following formula: =spl("=E@b(?.group(~1,~2;~.conj(~3.split@ct()).id().concat("","")))",A2:C12) Enter fullscreen mode Exit fullscreen mode As shown in the picture below: Explanation: group()function groups rows and handles data in each group; ~1 represents the first…
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What is Associative Arrays in Computer Science

What is Associative Arrays in Computer Science

In computer science, an associative array, map, symbol table, or dictionary is an abstract data type that stores a collection of (key, value) pairs, such that each possible key appears at most once in the collection. In mathematical terms, an associative array is a function with a finite domain. It supports 'lookup', 'remove', and 'insert' operations. The Dictionary Problem The dictionary problem is the classic problem of designing efficient data structures that implement associative arrays. The two major solutions to the dictionary problem are hash tables and search trees. It is sometimes also possible to solve the problem using directly…
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Matlab

Matlab

Introduction MATLAB short for Matrix Laboratory is a programming language developed byMathWorks. It is used for technical computing and is widely used in engineering,science, and mathematics. MATLAB is a powerful tool that can be used for avariety of tasks, including: Data analysis Data visualization Numerical computing Signal processing Image processing Machine learning Artificial intelligence Setting up MATLAB To set up MATLAB, you will need to download the software from the MathWorkswebsite. Once you have downloaded the software, you will need to install it onyour computer. The installation process is straightforward and should take a fewminutes to complete. Using MATLAB Once…
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Import A TXT File Where The Separator Is Missing In A Column To Excel

Import A TXT File Where The Separator Is Missing In A Column To Excel

Problem description & analysis: We have a comma-separated txt file that has a total of 10 columns. As certain values of the 3rd column do not have separators, that column is missing and the corresponding rows only have 9 columns, as shown in the last rows: We need to import the txt file to an Excel file. If the 3rd column is missing, use space to fill it and then sort rows by the 1st column: A B C D E F G H I J 3 01-0104-0133 MAYO RONIE #2 202403 2024-03-21 22:51:43.000 1449.49 0 0 8 4 01-0120-0137…
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Master Abstract Factory Design Pattern for Programming Interviews with 5 easy steps

Master Abstract Factory Design Pattern for Programming Interviews with 5 easy steps

Abstract factory design pattern is advanced-level programming interview question, candidates are often asked to demonstrate their understanding of design patterns, specifically the Abstract Factory design pattern. This pattern is essential for creating families of related objects without specifying their concrete classes, and understanding it can significantly boost your chances of acing the interview. Go ahead and check them out! Find the largest sum subarray using Kadanes AlgorithmMastering Object-Oriented Programming in C++Palindrome Partitioning A Comprehensive Guidewhat is parameter in coding and what is the deference between param and argument in programminghow to inverse a matrix in c# find the first occurrence…
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Catch, Optimize Client-Side Data Fetching in Next.js Using SWR

Catch, Optimize Client-Side Data Fetching in Next.js Using SWR

How to Optimize, Memorise Client-Side Data Fetching in Next.js Using SWR In modern web applications, efficient data fetching is crucial for providing a smooth and responsive user experience. Next.js, a popular React framework, offers several ways to fetch data. One effective method is using the SWR (stale-while-revalidate) library, which provides a powerful and flexible approach to data fetching and caching. In this article, we'll explore how to use SWR for client-side data fetching in a Next.js application, and we'll compare it with traditional React hooks for data fetching. Deploying Next JS Static Website on GH PAGES This is a Next.js…
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How to Conquer Imposter Syndrome

How to Conquer Imposter Syndrome

It's been about 20 days, and I've been very busy with my college assignments. But on the side, I managed to finish the basics of web development and tried to get back into coding by creating a few small projects. However, I encountered a significant challenge: imposter syndrome. I kept comparing myself to many younger developers who are excelling in the field, securing jobs at multinational corporations, landing remote positions, or even starting their own SaaS businesses. Moreover, I've come across numerous YouTube videos suggesting that the MERN Stack and web development, in general, are becoming saturated fields, and all…
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Converting RGBA to HEX in JavaScript: A Comprehensive Guide

Converting RGBA to HEX in JavaScript: A Comprehensive Guide

In web development, managing colors efficiently is crucial for creating visually appealing applications. One common task is converting colors from RGBA (Red, Green, Blue, Alpha) format to HEX (Hexadecimal) format. In this article, we’ll explore a robust JavaScript function to achieve this conversion seamlessly. Introduction to Color Formats Colors in web development can be represented in various formats, including: RGBA: Specifies colors with Red, Green, Blue, and Alpha (opacity) values.HEX: Represents colors using a hexadecimal code.Converting between these formats is often necessary for consistent styling across different platforms and tools. The rgbaToHex FunctionThe rgbaToHex function is designed to convert an…
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5 Best Tips to Improve Your Programming Skills

5 Best Tips to Improve Your Programming Skills

As a developer, good programming skills are the key to success in your career. Here are the five best tips that can help you improve your programming skills: Learn a New Programming Language: Don't just focus on one programming language. Learn a new language to broaden your horizons and understand different concepts. For example, if you're already good at JavaScript, try learning Python or Go. Join a Developer Community: Join a community like dev.to, Stack Overflow, or GitHub. Participate in discussions, share knowledge, and learn from other developers' experiences. Take Online Courses and Read Books: Take advantage of online resources…
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