self introduction
play

Self Introduction Dynamic Languages Day - PowerPoint PPT Presentation

Sep 26, 2022 •283 likes •595 views

Self Introduction Dynamic Languages Day Ellen.Van.Paesschen@vub.ac.be Programming Technology Lab - Vrije Universiteit Brussel Schedule Introduction to prototypes Important features of PBLs History of Self Selfs basics The power of Self

  1. Self Introduction Dynamic Languages Day Ellen.Van.Paesschen@vub.ac.be Programming Technology Lab - Vrije Universiteit Brussel

  2. Schedule Introduction to prototypes Important features of PBLs History of Self Self’s basics The power of Self Dynamic Languages Day Efficiency References

  3. Introduction To Prototypes Prototype theory is founded in the middle of the twentieth century as a response to the ancient class theory In 1986 prototypes are introduced into the OO community by Lieberman in “Using Prototypical Objects to Implement Shared Behavior in OO Systems“ “A prototype represents the default behavior for a concept” “New objects can reuse (part of) the prototype’s knowledge by saying how the new object differs from the prototype” Dynamic Languages Day PBLs are class-less OO languages Most PBLs are dynamically typed (only Omega isn’t) Self , Kevo, Agora, NewtonScript, ...

  4. Schedule Introduction to prototypes Important features of PBLs History of Self Self’s basics The power of Self Dynamic Languages Day Efficiency References

  5. Important Features of PBLs (1/3) Three ways to create new objects Cloning a prototype Creation ex-nihilo Dynamic Languages Day Extension

  6. Important Features of PBLs (2/3) Delegation or object-centered inheritance a prototypical Pen at (50,200) LOGO example t x e t *draw n r e o v c i searching... e n c a Pen at (100,200) i e 50 200 d r e l a t u x y n delegates to c i g e i x r o E 100 f o delegates to x self Dynamic Languages Day *forward a prototypical searching... Turtle at (25,200) 90 25 with heading 90 draw x heading

  7. Important Features of PBLs (3/3) Parent sharing *draw a Pen at self (50 , 200) (50 , 100) 50 200 100 x y 100 x Dynamic Languages Day a Pen at (100 , 200) (100 , 100) *forward *draw 90 (50 , 100) (50 , 200) a Turtle at heading y: 100 with heading 90

  8. Schedule Introduction to prototypes Important features of PBLs History of Self Self’s basics The power of Self Dynamic Languages Day Efficiency References

  9. History of Designed by 1986 Ungar&Smith @ XEROX Initial implementation 1987 “Self: The Power of Simplicity” @Stanford @OOPSLA'87 Research vehicle 1990 1st Public release Moved to 1991 Stanford 1992 More public releases 1993 Researched@Sun Dynamic Languages Day Self 4.0 1995 today Self 4.2.1

  10. Schedule Introduction to prototypes Important features of PBLs History of Self Self’s basics The power of Self Dynamic Languages Day Efficiency References

  11. Self’s Basics Visual exploratory programming environment Desktop An object Trash Input An object Dynamic Languages Day

  12. Self’s Basics Language features (1/2) Syntax and semantics resemble those of Smalltalk Blocks Everything is an object Manipulated via message sending Objects consist of slots Dynamic Languages Day Slots contain data or methods Assignable and constant data slots

  13. Self’s Basics Language features (2/2) Default creation is cloning prototype via copy Creation ex-nihilo via slot definition, e.g. (|x . y <- 5|) Delegation for behavioral inheritance Through parent slots, e.g. parent1* Dynamic Languages Day Extension (concatenation) for state inheritance copy-down

  14. Self’s Basics Traits objects gather shared reusable behavior Convention draw Traits Pen Delegation via parent* pointer Dynamic Languages Day 50 200 50 200 50 200 x y x y x y a Pen a Pen prototypical Pen copy copy

  15. Self’s Basics Maps transparently group objects x offset Map for Pen y offset 50 200 100 200 20 30 Dynamic Languages Day prototypical Pen a Pen a Pen copy copy Clone family

  16. Self’s Basics Dynamic delegation Traits Turtle draw Traits DashedTurtle draw forward backward Dynamic Languages Day 50 200 x y 90 heading becomeDashed a Turtle at (50,200) with heading 90

  17. Self’s Basics Multiple inheritance Traits forward draw MovingTurtle Traits backward DrawingTurtle Dynamic Languages Day 50 200 x y 90 heading a Turtle at (50,200) with heading 90

  18. Schedule Introduction to prototypes Important features of PBLs History of Self Self’s basics The power of Self Dynamic Languages Day Efficiency References

  19. a P The Power of Self Reflective meta-programming with mirrors 0 0 z asMirror 0 50 200 addSlots: |(z <- 0)| x y reflectee a mirror on a Pen a Pen Dynamic Languages Day Annotations Consulting size, parents, ... Changing structure Testing ...

  20. The Power of Self Example 1: Method overwriting asMirror draw = ( newBody ) draw = ( body ) draw=( body) at: ‘draw’ PutContents: draw=(new Body) Traits Pen (reflect:( newBody )) a mirror on Traits Pen Dynamic Languages Day 50 200 50 10 1 3 x y x y x y a Pen a Pen a Pen

  21. The Power of Self Example 2: Assignment shadowing (1/3) draw = ( body ) Traits Pen a Pen a Pen a Pen Dynamic Languages Day 50 200 50 10 1 3 x y x y x y Setters are automatically x: = ( ) x: = ( ) x: = ( ) provided per assignable slot ➔ ➔ ➔ y: = ( ) y: = ( ) y: = ( ) via a hidden data slot containing ➔ ➔ ➔ How to the assignment primitive intercept this x: ?

  22. The Power of Self Example 2: Assignment shadowing (2/3) How to override this x: ? x: = ( ) x: = ( ) x: = ( ) ➔ ➔ ➔ y: = ( ) y: = ( ) y: = ( ) ➔ ➔ ➔ x:5 50 200 50 10 1 3 x y x y x y a Pen a Pen a Pen asMirror Create a new object Dynamic Languages Day reflectee Add a parent link to original Pen x:val = ([new code] Change all references from original reflectee resend.x:val) Pen to new object Add new method possibly with super call a mirror on a Pen a Pen

  23. The Power of Self Example 2: Assignment shadowing (3/3) Six statements shadow: selector = ( |new . me| me: (reflect: self). Create a new object new: (reflect: (| |)). Add new method possibly with super call new at:(selector,':') PutContents: (('|:arg| resend.',selector, ': arg. \' new code \'.') parseObjectBody). Change all references from original Pen to new wrapper a new object (browse referencesOf: self)do:[ Dynamic Languages Day |:ref| (ref isFake) ifFalse:[(ref mirror)at:(ref storedName PutContents:new]]. Add a parent link to original Pen new at:(selector,'assignmentParent') PutContents: (reflect:self). (new at:(selector,'assignmentParent')) isParent: true.)

  24. Schedule Introduction to prototypes Important features of PBLs History of Self Self’s character The power of Self Dynamic Languages Day Efficiency References

  25. Efficiency Is Self slow? Significant optimisations of the Self compiler by Chambers and Hölzle @ Sun Branch prediction Optimisation of the fetch-decode-execute processor cycle for branch instructions Inline caching Dynamic Languages Day Traits containing the intended behavior are ``guessed” during method lookup ≈ 2 * speed of optimised C

  26. Schedule Introduction to prototypes Important features of PBLs History of Self Self’s character The power of Self Dynamic Languages Day Efficiency References

  27. References Self homepage http://research.sun.com/research/self Self 4.2.1 http://research.sun.com/research/self/release_4.2/release.html Self online tutorial - Wolzcko, De Corte http://research.sun.com/research/self/release_4.0/Self-4.0/Tutorial/index.html SelfSync: a RTE environment in Self http://prog.vub.ac.be/~ellenvp Self SWIKI Dynamic Languages Day http://www.merlintec.com:8080/Self Self Programmer’s Reference Manual Self folder /manuals

  28. References Programming as an Experience: The Inspiration for Self (1995) - Smith, Ungar Self: The Power of Simplicity (1987) - Ungar, Smith Parents are Shared Parts: Inheritance and Encapsulation in Self (1991) - Chambers, Ungar, Chang, Hölzle Organizing Programs Without Classes (1991) - Ungar, Dynamic Languages Day Chambers, Chang, Hölzle

  29. Dynamic Languages Day ??? Questions

  30. Dynamic Languages Day

  31. Dynamic Languages Day

Download Presentation
Download Policy: The content available on the website is offered to you 'AS IS' for your personal information and use only. It cannot be commercialized, licensed, or distributed on other websites without prior consent from the author. To download a presentation, simply click this link. If you encounter any difficulties during the download process, it's possible that the publisher has removed the file from their server.

Recommend

INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION

INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION

TRAINING COURSE ON SOCIAL PROTECTION &amp; FORMALIZATION TRINIDAD AND TOBAGO MARCH 15, 2017 INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION Design of the NIS Assistance from the

547 views • 23 slides
INTRODUCTION Introduction 2/42 INTRODUCTION Alternations I am giving bread to the

INTRODUCTION Introduction 2/42 INTRODUCTION Alternations I am giving bread to the

Patterns of variation in the expression of case and agreement Andrs Brny Leiden University Centre for Linguistics 9 November 2019, BaSIS Workshop a.barany@hum.leidenuniv.nl INTRODUCTION Introduction 2/42 INTRODUCTION

1.37k views • 42 slides
Introduction Introduction Introduction Introduction Outline Motivation Failures

Introduction Introduction Introduction Introduction Outline Motivation Failures

Introduction Introduction Introduction Introduction Outline Motivation Failures Definition and concepts Process and product properties Principles SE Approaches Motivation Software and the economy The economies of

1.03k views • 49 slides
Introduction Introduction Introduction Nationwide Cause for Concern 1

Introduction Introduction Introduction Nationwide Cause for Concern 1

Introduction Introduction Introduction Nationwide Cause for Concern 1 https://www.cdc.gov/std/stats17/infographic.htm Introduction Epidemiology in Western Colorado CPHE Surveillance Data Report, May 2018 Chlamydia Epidemiology in Western

977 views • 39 slides
DAQ introduction Purpose of this talk : (1) Introduction for those who have not been in every

DAQ introduction Purpose of this talk : (1) Introduction for those who have not been in every

DAQ introduction Purpose of this talk : (1) Introduction for those who have not been in every meeting (2) Some ideas of diagrams for section 7.1 (Introduction) of TP. Giles Barr 25 Jan 2018, Pembroke College On DUNE, the reality is there is a

474 views • 10 slides
INTRODUCTION cf. Schneider, Chapter 1 INTRODUCTION THEY ARE OUT TO GET YOU INTRODUCTION WHAT

INTRODUCTION cf. Schneider, Chapter 1 INTRODUCTION THEY ARE OUT TO GET YOU INTRODUCTION WHAT

ADVANCED COMPUTER SECURITY INTRODUCTION cf. Schneider, Chapter 1 INTRODUCTION THEY ARE OUT TO GET YOU INTRODUCTION WHAT IS SECURITY? A systems security policies describe What the system is supposed to do Store and provide access

479 views • 16 slides
Overview Introduction to SMIL Introduction to W3C and XML Introduction to SMIL

Overview Introduction to SMIL Introduction to W3C and XML Introduction to SMIL

Overview Introduction to SMIL Introduction to W3C and XML Introduction to SMIL Writing a SMIL file Adding Media Objects Martin Halvey Clipping media files January 2008 Timing and Synchronising Layout World Wide

387 views • 14 slides
14 Introduction Introduction Bad guys can put malware into Example: hosts

14 Introduction Introduction Bad guys can put malware into Example: hosts

Introduction Introduction source Encapsulation ISO/OSI reference model message M application segment H t H t M transport network datagram H n H n H t M presentation: allow applications to frame link H l H n H t M interpret

583 views • 4 slides
Previous Lecture Introduction to SMIL 2 Introduction to W3C and XML Introduction to SMIL

Previous Lecture Introduction to SMIL 2 Introduction to W3C and XML Introduction to SMIL

Previous Lecture Introduction to SMIL 2 Introduction to W3C and XML Introduction to SMIL Writing a SMIL file Adding Media Objects Martin Halvey Clipping media files January 2008 Timing and Synchronising Layout

322 views • 8 slides
Lecture 1 Andreas Habegger Introduction Zynq Introduction Zynq Introduction Zynq PS vs. PL

Lecture 1 Andreas Habegger Introduction Zynq Introduction Zynq Introduction Zynq PS vs. PL

Introduction Zynq Lecture 1 Andreas Habegger Introduction Zynq Introduction Zynq Introduction Zynq PS vs. PL Processing System Processor Peripherals Data Buses AXI Bus Conclusion BTE5380 - Embedded Systems Octobre 2014 Andreas Habegger

1.81k views • 30 slides
2018.06 01 SMILE5 Introduction S E 5 02 Alpha Cloud M I L 03 Company Introduction 04

2018.06 01 SMILE5 Introduction S E 5 02 Alpha Cloud M I L 03 Company Introduction 04

2018.06 01 SMILE5 Introduction S E 5 02 Alpha Cloud M I L 03 Company Introduction 04 Project References S E 5 PART.1 SMILE5 Introduction M I L Introduction STORION-SMILE5 Residential Energy Storage System Inverter 5kW Output Input

1.06k views • 25 slides
Introduction to CICS Course introduction Course introduction What is CICS? What is an

Introduction to CICS Course introduction Course introduction What is CICS? What is an

Introduction to CICS Course introduction Course introduction What is CICS? What is an application server? Why use an application server? Course introduction Services provided by CICS How CICS applications are defined Scaling CICS to meet

1.84k views • 146 slides
Network Visualization Introduction Presented by Shahed Introduction Introduction Basic

Network Visualization Introduction Presented by Shahed Introduction Introduction Basic

Network Visualization Introduction Presented by Shahed Introduction Introduction Basic building blocks Node Links (relationship between nodes) Spatial information Network data

584 views • 9 slides
Introduction Introduction (1) Main argument of the paper: universities are not only

Introduction Introduction (1) Main argument of the paper: universities are not only

Le jugement des pairs comme outil de management des universits Peer-review as a management tool Christine Musselin (CSO, Sciences Po et CNRS) Avril 2013, Lirrsistible ascension du capitalisme acadmique Introduction Introduction (1)

590 views • 28 slides
Introduction Introduction to storage and to storage and filesystems filesystems Introduction

Introduction Introduction to storage and to storage and filesystems filesystems Introduction

Moreno Baricevic Gilberto Daz Axel Kohlmeyer Stefano Cozzini ULA ICTP CNR-IOM DEMOCRITOS Merida, VENEZUELA Trieste, ITALY Trieste, ITALY Introduction Introduction to storage and to storage and filesystems filesystems Introduction

1.19k views • 51 slides
JABLOTRON JA-100 introduction November 2011 Introduction Todays goals First introduction of

JABLOTRON JA-100 introduction November 2011 Introduction Todays goals First introduction of

JABLOTRON JA-100 introduction November 2011 Introduction Todays goals First introduction of the brand new JA-100 alarm system Visions Basic architecture System components Setting Help us with final validations You are the FIRST ones

1.69k views • 111 slides
Welcome to the REAL World REAL Disruption: The Shared Economy, The Workforce and Real Estate

Welcome to the REAL World REAL Disruption: The Shared Economy, The Workforce and Real Estate

Welcome to the REAL World REAL Disruption: The Shared Economy, The Workforce and Real Estate Presented by Chris Hood Meet Our Speaker Chris Hood Advanced Workplace Associates Ltd 40 Gracechurch Street, London EC3V 0BT UK Telephone: +44

505 views • 37 slides
German coal phase out agreement and how that relates to their energy transition plans and

German coal phase out agreement and how that relates to their energy transition plans and

German coal phase out agreement and how that relates to their energy transition plans and policies Parallel Session 4-1: Challenges and opportunities from fossil energy to renewable energy; LCS-RNet 11 th Annual Meeting; Rome, 17./18.10.2019

561 views • 30 slides
Niina Ormshaw International Coordinator Faculty of Information Technology 1. Planning your

Niina Ormshaw International Coordinator Faculty of Information Technology 1. Planning your

Niina Ormshaw International Coordinator Faculty of Information Technology 1. Planning your Studies 5. Examinations 2. Registering for Courses 6. Assessment and Grades 3. Modes of Study 7. Contact with the Staff 4. Written Assignments

446 views • 40 slides
The Seven Churches of Revelation The Seven Churches of Revelation 2 Corinthians 5:10 For we

The Seven Churches of Revelation The Seven Churches of Revelation 2 Corinthians 5:10 For we

The Seven Churches of Revelation The Seven Churches of Revelation The Seven Churches of Revelation The Seven Churches of Revelation The Seven Churches of Revelation 2 Corinthians 5:10 For we must all appear 2 Corinthians 5:10 For we must

806 views • 38 slides
Fast, Safe, Pure-Rust Elliptic Curve Cryptography Isis Lovecruft / Henry de Valence RustConf 2017

Fast, Safe, Pure-Rust Elliptic Curve Cryptography Isis Lovecruft / Henry de Valence RustConf 2017

Fast, Safe, Pure-Rust Elliptic Curve Cryptography Isis Lovecruft / Henry de Valence RustConf 2017 Overview What is curve25519-dalek ? Implementing low-level arithmetic in Rust Rust features we love, and features we want to improve Implementing

806 views • 28 slides
Adaptive consumer-resource models LIPh lab winter workshop 2018 Leonardo Pacciani-Mori December

Adaptive consumer-resource models LIPh lab winter workshop 2018 Leonardo Pacciani-Mori December

Adaptive consumer-resource models LIPh lab winter workshop 2018 Leonardo Pacciani-Mori December 16th, 2018 The context of our work 1 of 8 The context of our work Competitive Exclusion Principle (CEP): the number of competing coexisting

1.15k views • 60 slides
Organic.Edunet Nikos Palavitsinis Greek Research &amp; Technology Network TERENA TF Media

Organic.Edunet Nikos Palavitsinis Greek Research &amp; Technology Network TERENA TF Media

Organic.Edunet Nikos Palavitsinis Greek Research &amp; Technology Network TERENA TF Media Meeting 18-19 March, 2010, Athens, Greece Structure Introduction Organic.Edunet Architecture Metadata AP Tools (portal and confolio

535 views • 38 slides
Building Sustainability into the College Strategic Plan Webinar April 2, 2014 Supporting

Building Sustainability into the College Strategic Plan Webinar April 2, 2014 Supporting

Building Sustainability into the College Strategic Plan Webinar April 2, 2014 Supporting community colleges in educating for and building a clean and sustainable economy 2 www.theseedcenter.org Thank You Co-Host: Johnson County Community

582 views • 34 slides

More recommend