Interpreted Languages: PHP, Perl, Python, Ruby (Sheet One) - Hyperpolyglot
This reference sheet provides a side-by-side comparison of JavaScript, Python, PHP, and Ruby across multiple programming domains—from basic grammar and variables through advanced features like threads and databases. It covers syntax differences (like how each language defines functions, handles string interpolation, and structures control flow), built-in data types and operations (arrays, dictionaries, mathematical functions), and practical facilities (regular expressions, date/time handling, exception management). The second sheet extends the comparison into areas like file I/O, web functionality, object-oriented programming, reflection, and testing, making it a comprehensive quick-reference guide for developers working across these four languages or learning a new one by comparison.