Programming Language Reference
Every built-in function and method, with its syntax, parameters, return value and short examples you can run. Organised by language and version.
Python 3 Reference
The complete Python 3 reference: every built-in function and method with syntax, parameters, return values and easy examples you can run in your browser.
JavaScript Reference
The JavaScript reference: every built-in array, string and object method with syntax, the ECMAScript edition that added it, and examples you can run in your browser.