Hyperpolyglot Interpreted Languages: JavaScript, PHP, Python, Ruby (Sheet One) a side-by-side reference sheet sheet one: version | grammar and execution | variables and expressions | arithmetic and logic | strings | regexes | dates and time | resizable arrays | dictionaries | functions | execution control | exceptions | concurrency sheet two : streams | files | file formats | directories | processes and environment | option parsing | libraries and namespaces | objects | inheritance and polymorphism | reflection | net and web | gui | unit tests | debugging and profiling | java interop version javascript php python ruby version used 5.5 2.7; 3.3 1.9; 2.0 show version $ node -- version $ php -- version $ python -V $ python -- version $ ruby -- version implicit prologue <script src="underscore.js"> </script> none import os, re, sys none grammar and ...