A payroll script I built for a small U.S. company received employee badge IDs from several office locations. The combined data was already sorted, but some IDs appeared more than once. Those duplicates caused incorrect employee counts and extra payroll validation work. To remove duplicates from a sorted array in Python, I used the two-pointer technique. … Read more >>
Last month, I had to iterate through a 2D array in Python while building a paid time off app for a client’s 10-person US team. HR tracked requests in a shared Excel sheet, so I replaced it with a local Python app and SQLite database. The SQLite query returned a list of tuples, which works … Read more >>
I once helped a small U.S. company replace an HR leave tracker built in Excel. Ten employees emailed requests, one manager updated the workbook, and conflicting edits caused regular confusion. We first built a local Python leave request app that stored each request in an SQLite database. Once the app collected reliable data, HR wanted … Read more >>
I often start small automation scripts with a simple list. For example, when I build a local command-line app to track leave requests for a 10-person team, I need a place to collect employee names, requested dates, and approval statuses before saving anything. That is where knowing how to append to an array in Python … Read more >>
You’re working with an API response or a form object, and suddenly you need to loop through all its properties. Maybe you want to validate fields, transform data, or log values. You try a regular loop, but objects don’t behave like arrays, and things get messy fast. That’s where the for…in loop in TypeScript comes … Read more >>
You’re working with an API response in TypeScript. It returns a list of users, and you need to loop through them to validate data or update values. You try a quick loop, but suddenly type errors pop up, or the compiler complains. Sound familiar? That’s where understanding how to use a for loop in TypeScript properly makes … Read more >>
You’re building a user module for an app. You get API data, validate it, and create objects that follow a strict shape. But things get messy when multiple objects need the same structure and behavior. This is where extending interfaces with classes in TypeScript becomes useful. You define a contract using an interface and enforce … Read more >>
You’re building a form handler or API service, and you want your objects to not only store data but also include functions. For example, a user object that can calculate age or validate input. You try adding functions, but TypeScript throws type errors or doesn’t behave as expected. This is where functions in TypeScript interfaces … Read more >>
You’re working with API data or form input and expect it to follow a specific structure. But TypeScript throws no error at runtime, and suddenly your app breaks because the object didn’t match your interface. This happens because interfaces in TypeScript exist only at compile time. That means you can’t directly “check” them at runtime … Read more >>
You’re working with API data or form inputs, and suddenly you need to remove a field before sending it forward. Maybe you want to strip out a password, remove metadata, or clean up unused properties. Sounds simple, but in TypeScript, you also need to think about type safety. That’s where things get tricky. JavaScript lets … Read more >>
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