Programming

Discover the best way to get the last element of a Python list using negative indexing alist[-1]. Compare with alist[len(alist)-1], performance, best practices, and edge cases for efficient list handling.

Recover a dropped git stash: find its hash via git stash pop output, git fsck or reflog; inspect with git show/gitk, then apply or recreate the stash ref.

Learn how to convert datetime strings like 'Jun 1 2005 1:33PM' to Python datetime objects using strptime, pandas.to_datetime, and dateutil.parser. Handle lists, edge cases, AM/PM, and locales efficiently.

Official C# version history with exact release dates from 1.0 to 12.0. Discover key features per version and why C# 3.5 never existed—shipped with .NET 3.5 but language stayed at 3.0. Complete timeline for developers.

Learn to break long YAML strings over multiple lines using literal (|) and folded (>) block scalars. Preserve quotes, control newlines with chomping, and avoid concatenation pitfalls for readable YAML configs.

Learn to print colored text in Python terminal using ANSI escape codes, termcolor, and colorama for python colored print. Cross-platform examples, troubleshooting, and best practices for python print color text.

Learn how to add new keys to a Python dictionary using assignment, update(), setdefault(), and merge operators. No dict.add() method—use these efficient idioms for key-value pairs with examples and pitfalls.

Learn the most efficient way to iterate over Java Map entries using entrySet(), Java 8 forEach, and streams. Avoid keySet() lookups for better performance. Covers HashMap ordering and safe removal.

Discover the optimal sock pairing algorithm using in-place sorting like heapsort for O(n log n) time under log-space constraints. Compare with hashing, radix methods, and practical tips for 30 pairs. Relates to element distinctness.

Learn how to resolve merge conflicts in Git step-by-step. Use git status to spot issues, edit files to remove markers, git add resolved files, and commit. Tips for git mergetool, aborting merges, and prevention.

Learn how to revert a Git repository to a previous commit like 0d1d7fc using git reset --hard or git revert commit. Safe methods for local and shared branches, with examples, recovery tips, and git reset head alternatives.

Learn what metaclasses are in Python, how they work as the class of a class, and their uses like automatic registries, ORM mapping, and framework enforcement. Examples included.

Learn what stack and heap are in programming, their physical location in computer memory, differences in management by OS or runtime, sizes, scope, and why stack is faster. Detailed guide with examples.

Learn to create a VS Code workspace with global toolchains for AVR/STM32, PlatformIO extensions, and project-specific .vscode settings for tasks.json, launch.json, and debugging with Cortex-Debug.

Explore the C++11 memory model, its impact on multithreading, std::atomic, memory_order (seq_cst, acquire/release, relaxed), happens-before, data races, and hardware mappings for safe concurrent C++ programming.

Java compound assignment operators (+=, -=, *=, /=) implicitly cast the promoted result back to the left-hand type, so i += j compiles without an explicit cast.

Learn how to undo the most recent local commits in Git using git reset (--soft, --mixed, --hard) or git revert. Step-by-step fixes for wrong files, recovery with reflog, and when to avoid rewriting history. No push needed.

Learn best practices for JSON null representation across all data types. Understand conventions for integers, strings, collections, and when to use null vs. omitting fields.

Resolve 'python indexerror string index out of range' in L-system fractal generation using Python turtle. Learn root cause, step-by-step fix, corrected code, and best practices for safe string iteration and axiom building.

Learn how to securely pass parameters into Golang Gorm ORDER BY clauses using clause.Expr for custom ordering with array_position.