Tech Answers
Browse our in-depth and concise programming answers and technical solutions with over 20+ posts.
- What Are the C++ Operators: A Practical ReferenceConcise reference to C++ operators: categories, examples, pitfalls, and when to use or overload them.
- How to Merge Arrays in PHP: Combine Array with array_mergePractical ways to merge arrays in PHP with correct key behavior, deep merges, and performance notes, and show how easy it is to use PHP to combine arrays.
- PHP Regex Tutorial with 'preg_match': Practical Patterns and PitfallsA concise PHP Regex Tutorial for matching and capturing text in PHP with preg_match, that includes examples, gotchas, and sources.
- PHP How to Print Array: Practical Examples (print r, var dump, foreach)PHP 'how to print array' answer post. Clear, practical ways that use PHP to print an array for debugging or display, with examples and common pitfalls.
- How to Slice a List in Python: Python List Slicing with ExamplesPractical patterns for Python list slicing: start:stop:step, negative indices, copies vs views, and quick recipes for first, last, n, stride, and reverse slices.
- Python Get Index of Item in List: Get an Index of an Element for a List in PythonPractical ways to use Python to get an index of an item in a list. We include Python enumerate examples, list.index(), and patterns for first or all matches.
- Rust String Types: Rust Difference Between str and StringClear, practical differences between Rust's `str` and `String`, with conversions, common patterns, and gotchas. Includes FFI/OS string notes.
- Nginx 301 Redirects with a Map: One-to-Many Slug Migrations (Working Example)Set up one-to-many 301 redirects in Nginx using a map file. Fix common pitfalls: map location, $uri vs $request_uri, ordering, semicolons, and trailing slashes.
- Go Map Contains Key: Golang Check if a Key is in MapUse Go's comma-ok idiom to test whether a key exists in a map without confusing zero values for absence.
- JavaScript Remove Key Value from Object: Delete Key from Object in JavaScriptJavaScript: remove key value from object tutorial. What are JavaScript objects, and use JavaScript to delete a key in an object.
- Search inside files recursively with grep (and faster alternatives)How to search for text in files with grep, find+xargs, ripgrep, and git grep on Linux and macOS, with practical excludes and pitfalls.
- How a JavaScript Function Closure WorksWhat a JavaScript closure is, when to use it, and common pitfalls—with short examples.
- Linux: How to Check Disk Space (df, du, lsblk)Practical commands to check free disk space and usage on Linux (with macOS equivalents). Covers df, du, lsblk/diskutil, inode checks, and quick triage patterns.
- Terminal: How to Delete a Directory (Linux/macOS) SafelyFast, safe ways to delete a directory from the terminal. Covers rm, rmdir, find, and trash-style commands, with flags explained and common pitfalls to avoid.
- How Does Python Yield Work?A concise, practical guide to how Python's 'yield' keyword works, when to use it, and common pitfalls.
- Git Reset Local Branch To RemoteHow to undo a mistaken `git add` (unstage) with modern commands, legacy equivalents, and the initial-commit edge case.
- JavaScript: Delete/Remove Element from ArrayPractical ways to remove items from a JavaScript array by index, value, or position—what to use and when.
- Python Ternary Operator Explained: `x if cond else y` with Clear ExamplesHow to use Python's conditional expression (the 'ternary operator') correctly, with concise examples and common pitfalls.
- Bash: How to Exit a Script or Function GracefullyLearn several ways to exit a running Bash script or function without closing your terminal, including best practices for graceful exits and handling errors.
- Most Efficient Python String Concatenation: Methods, Pitfalls, and Best PracticesThe fastest and most memory-efficient way to concatenate strings in Python, plus gotchas and common mistakes to avoid.
- Why Use a Python Virtual Environment?Learn why Python virtual environments are essential for managing dependencies, isolating projects, and avoiding system conflicts.
- How to Create a Dictionary Using Comprehension in PythonShows how to create a dictionary from two lists using dictionary comprehension and zip in Python.
