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Project Description of Prototypal Inheritance

Group Members

Name Github Account
王子博 Smart-Hypercube
王嵩超 songchaow
安鸣霄 nvagus

Visit our organization for this project's codes and docs.

Overview

Much different from Class-based Inheritance, as a style of object-oriented programming, Prototypal Inheritance provides a novel approach of reusing data.

Here's a quick view of the phenomenon:

var foo = {name: "foo", one: 1, two: 2};
// another object
var bar = {two: "two", three: 3};
Object.setPrototypeOf(bar, foo); // foo is now the prototype of bar.
bar.one // Resolves to 1.

Our Project's Description

In this project, we will do a simple survey on the phenomenon of Prototypal Inheritance. We will mainly cover in:

  • Concepts of Prototypal Inheritance [songchaow]
  • Genesis(origin) of prototype-based programming model [songchaow]

We will discuss the design ideas that Prototype-based Programming has adopted, including delegation, extension and other concepts from Frame Theory and a small language called Actor.

  • The benefits of Prototypal Inheritance towards programmers [Smart-Hypercube, nvagus]
  • The embodiment of Prototypal Inheritance in several programming languages(such as JavaScript) and their usages [Smart-Hypercube]
  • The implementation of Prototypal Inheritance we'll try on Python. [nvagus, https://github.com/compiler-teamwork-group09/python3-proto]

Though Python itself already has some properties of Prototypal Inheritance(e.g. we can dynamically add attributes to an object instantiated from a class), We plan to implement a Prototypal Inheritance system that does not require our own definition of classes, providing full-featured interfaces without resort of classes via Python's decorators.

Journal

  • By Dec 23rd, 2017.

    • Discussion on QQ: scheduling.
    • Concept and origin: information collected.
    • Implementation on Python(namely, python3-proto project): utils confirmed.

  • By Jan 3rd, 2017

    • Documents:

      • a repository for documents has been established(documents repository).

      • songchaow analyzed general features and design philosophy of prototype-based programming compared to class-based programming.(the first part of README.md)

      • Smart-Hypercube added his insights into protypal inheritance on the designing level, and poited out some implementation mechanisms of prototype characteristics related to Python and Javascript.(the second part of README.md)

    • python3-proto project:

      nvagus reorganized the structure of this project.

  • By Jan 13rd, 2018

    Discussion at Library in West Campus for 1 hour.

    Discussion on QQ for all day.

    • Documents:

      The report for this project has been published in document repository. [songchaow]

    • python3-proto project:

      The README.md has been added. [nvagus]]

      Lots of comments has been added to python codes. [nvagus]

    • PPT for report

      The PDF version of PPT for report has been added. [Smart-Hypercube]

    • Discussion with other groups:

      We asked questions about technical details of other teams' work and received enthusiastic responses from Groups 4 and 13.

      See the issue pages of their repos for details.

References