Programming

Questions about C#, Python, Java, algorithms, and code architecture.

ProgrammingDynamic PWM Frequency Adjustment on MSP430FR5739

Learn how to dynamically adjust PWM frequency on MSP430FR5739 using Timer_A capture/compare for external signals. Single-timer ISR approach for low-latency updates, code examples, and glitch-free operation with max period fallback.

3 answers• 1 view
ProgrammingQt QStateMachine: QPropertyAnimation Not Starting on Transition

Fix QPropertyAnimation staying Paused in Qt QStateMachine transitions with addAnimation(). Learn why it fails on QGraphicsItem, how to use QGraphicsObject + Q_PROPERTY, assignProperty, and sync with finished() signals for smooth qt state machine animations.

4 answers• 1 view
ProgrammingMicrosoft Graph API 404 Errors in Pytest Automation: Causes and Solutions

Learn why Microsoft Graph API returns 404 errors in pytest automation while working in Postman and Graph Explorer. Discover authentication flow differences, permission issues, and troubleshooting solutions.

6 answers• 1 view
ProgrammingJavaScript Object Destructuring: Syntax and Purpose

Learn how JavaScript object destructuring works with examples like `const { x } = y` and `const { index, axis, value } = event.detail`. Discover syntax, purpose, and advanced techniques.

5 answers• 1 view
ProgrammingHow to Make Items Disappear When Touched in Pocket Code

Learn how to make items disappear when touched in Pocket Code using visual programming blocks. Step-by-step guide for creating interactive game elements.

8 answers• 1 view
ProgrammingPurpose of conftest.py in Pytest: Fixtures & Best Practices

Discover the purpose of conftest.py in Pytest for sharing fixtures without imports. Learn root usage, multiple files, scopes, hooks, and best practices for organizing pytest fixtures in test suites.

5 answers• 1 view
ProgrammingReact .js vs .jsx: Differences, Usage & Best Practices

Understand the key differences between .js and .jsx files in React. JSX works in both, but learn when to prefer .jsx for components, .js for utils, and how ESLint, Emmet, and bundlers enhance workflow with proper extensions.

6 answers• 1 view
ProgrammingPandas Pivot Table: Long to Wide DataFrame Guide

Learn pandas pivot and pivot_table to reshape DataFrames from long to wide format. Handle duplicates with aggfunc (mean, sum), fill NaNs, multi-indexes, crosstab counts, and melt reverse. Code examples for real scenarios.

6 answers• 2 views
ProgrammingHow to Check GitHub Repo Size Before Git Clone

Learn to check GitHub repository size in KB via API before git clone. Use curl, JavaScript, or CLI examples for public/private repos. Avoid disk surprises with shallow clone tips and limitations.

5 answers• 1 view
ProgrammingHow to Replace Line Breaks (\r\n, \n) in C# Strings

Learn to replace newlines like \r\n or \n in C# strings using ReplaceLineEndings, Regex.Replace, or chained methods. Handle cross-platform text from files or APIs with code examples and pitfalls.

6 answers• 1 view
ProgrammingHow to Count Char Occurrences in Java String One-Liner

Idiomatic Java ways to count specific characters like dots in strings without loops: streams, replace tricks, regex. Efficient one-liners for 'a.b.c.d' yielding 3, with performance tips and best practices for Java strings.

4 answers• 1 view
ProgrammingDetect First & Last Iteration in PHP Foreach Loop

Learn efficient ways to detect first and last iterations in PHP foreach loops using counters, array_key_first/last (PHP 7.3+), flags, and preprocessing. Best practices for performance, edge cases, and readability in foreach PHP.

8 answers• 1 view
ProgrammingHow to Apply .gitignore to Committed Files in Git (git rm --cached)

Learn to untrack already committed files with git rm --cached, apply .gitignore to build artifacts like node_modules or venv, and remove them from Git history using filter-branch. Step-by-step guide for clean repos.

5 answers• 1 view
ProgrammingPrint NumPy Matrix as Formatted Table with Headers in Python

Learn to print NumPy matrix as a neatly aligned table with variable-length headers like team names. Use tabulate for exact output, pandas DataFrame, or PrettyTable. Right-align numbers, no loops needed. Step-by-step code examples for console tables.

6 answers• 1 view
ProgrammingFix Relative Imports Python: Non-Package Error Guide

Resolve 'attempted relative import in non-package' error for relative imports Python across subpackages like app/sub1 to sub2. Use absolute imports or python -m flag for clean fixes without sys.path hacks.

1 answer• 2 views
ProgrammingFix 'Event Loop Already Running' in FastAPI Azure Functions

Resolve the 'event loop is already running' error in FastAPI Azure Functions with concurrent requests. Learn to use nest-asyncio, async endpoints, TableClient reuse, and best practices for smooth concurrency handling.

1 answer• 2 views
ProgrammingGit: List Files in Last Commit Only (No Diffs)

View only files changed in the last Git commit without diffs using git show --name-only or git diff --name-only HEAD~1 HEAD. Perfect for git show files, git diff files, git list files in scripts or quick audits—no patch details shown.

1 answer• 2 views
ProgrammingHow to Rename a Git Repository: Local and Remote Steps

Learn how to rename a Git repository locally and on platforms like GitHub. Update remotes and avoid common pitfalls.

1 answer• 2 views
ProgrammingUnity Hub Error Troubleshooting: Complete Guide to Fix Common Issues

Comprehensive guide to fixing Unity Hub errors including validation failures, installation problems, and authentication issues. Learn step-by-step solutions.

1 answer• 2 views
ProgrammingCIE Delta E 2000 Pure Python: Fix Implementation Errors

Learn to implement delta e 2000 in pure Python without NumPy. Fix common bugs in CIE delta e 2000 code and match colour-science results exactly.

1 answer• 2 views