Coding standard for:

C++
C#
Java
Python
Rust
R
JavaScript
Scala

Style Guide of Common Languages

A file consists of sections that should be separated by blank lines and an optional comment
identifying each section.

> Files longer than **2000** lines are cumbersome and should be avoided.

## Java Source Files

Each Java source file contains a single public class or interface. When private classes and
interfaces are associated with a public class, you can put them in the same source file as the
public class. The public class should be the first class or interface in the file.

Java source files have the following ordering:

### Beginning Comments

All source files should begin with a c-style comment that lists the programmer(s), the date, a copyright notice, and also a brief description of the purpose of the program. For example:

/*
 * Classname
*
 * Version info
 *
 * Copyright notice
 */

 ...

### Package and Import Statements

The first non-comment line of most Java source files is a package statement. After that,
import statements can follow. For example:

package java.awt;

import java.awt.peer.CanvasPeer;


### Class and Interface Declarations

The following table describes the parts of a class or interface declaration, in the order that they should appear. See [this]() for an example that includes
comments.

| Seq# | Part of Class|	Notes |
|------|--------------|-------|
|1| Class/interface documentation comment (/**...*/)    |---|
|2|class or interface statement     |---      |
|3|Class/interface implementation comment (/*...*/), if necessary   |This comment should contain any class-wide or interface-wide information that wasn’t appropriate for the class/interface documentation comment.     |
|4|Class (static) variables |	First the public class variables, then the protected, and then the private.|
|5|Instance variables   |First public, then protected, and then private.  |
|6|Constructors |	---|
|7|Methods   | These methods should be grouped by functionality rather than by scope or accessibility. For example, a private class method can be in between two public instance methods. The goal is to make reading and understanding the code easier.   |

A file consists of sections that should be separated by blank lines and an optional comment
identifying each section.

> Files longer than **2000** lines are cumbersome and should be avoided.

# Java Source Files

Each Java source file contains a single public class or interface. When private classes and
interfaces are associated with a public class, you can put them in the same source file as the
public class. The public class should be the first class or interface in the file.

Java source files have the following ordering:

## Beginning Comments

All source files should begin with a c-style comment that lists the programmer(s), the date, a copyright notice, and also a brief description of the purpose of the program. For example:

## Package and Import Statements

The first non-comment line of most Java source files is a package statement. After that,
import statements can follow. For example:

## Class and Interface Declarations

The following table describes the parts of a class or interface declaration, in the order that they should appear. See [this]() for an example that includes
comments.

Style Guide for Python

Style Guide for Java

Style Guide for PHP

Style Guide for JavaScript

Style Guide for R

Style Guide for C++

Style Guide for C#

Style Guide for Rust

Style Guide for Scala

File Organization

Java Source Files

Beginning Comments

Package and Import Statements

Class and Interface Declarations

Seq#	Part of Class	Notes
1	Class/interface documentation comment (/*…/)	—
2	class or interface statement	—
3	Class/interface implementation comment (/…/), if necessary	This comment should contain any class-wide or interface-wide information that wasn’t appropriate for the class/interface documentation comment.
4	Class (static) variables	First the public class variables, then the protected, and then the private.
5	Instance variables	First public, then protected, and then private.
6	Constructors	—
7	Methods	These methods should be grouped by functionality rather than by scope or accessibility. For example, a private class method can be in between two public instance methods. The goal is to make reading and understanding the code easier.