Let's Build a Compiler

Interpreter pattern Uses for the Interpreter pattern[edit] Specialized database query languages such as SQL.Specialized computer languages which are often used to describe communication protocols.Most general-purpose computer languages actually incorporate several specialized languages. Structure[edit] Example[edit] The following Backus-Naur Form example illustrates the interpreter pattern. expression ::= plus | minus | variable | number plus ::= expression expression '+' minus ::= expression expression '-' variable ::= 'a' | 'b' | 'c' | ... | 'z' digit = '0' | '1' | ... | '9' number ::= digit | digit number defines a language which contains Reverse Polish Notation expressions like: a b + a b c + - a b + c a - - Following the interpreter pattern there is a class for each grammar rule. While the interpreter pattern does not address parsing[1]:247 a parser is provided for completeness. Finally evaluating the expression "w x z - +" with w = 5, x = 10, and z = 42. See also[edit] References[edit] External links[edit]

Tutorials # Tutorials ## General Tutorials - [Data Science Essentials]( introduction to data visualization and exploration concepts - [CS109]( Collection of data science lectures with programming assignments and projects - [Introduction to Data Science]( comprehensive overview of modern data science - [Data Analyst Nanodegree]( General Tutorials Python Tutorials R Tutorials

Lettre Édu_Num Documentation Hors-série #TraAMDoc 2018 — Documentation (CDI) Sommaire Cette lettre présente des exemples de productions issus des TraAM Documentation 2017-2018, ainsi que quelques pistes de réflexion pour les TraAM 2018-2019. Cette année, les équipes ont travaillé, échangé et mutualisé sur la thématique suivante : "Repenser l’espace existant du CDI pour répondre aux besoins des usagers. Comment repenser l’espace existant du CDI pour répondre aux besoins des usagers (élèves, professeurs, personnels)? Comment le professeur documentaliste peut-il formaliser et mettre en oeuvre une démarche de design thinking au sein de l’espace CDI?" Les six académies retenues dans le cadre des TraAM documentation 2017-2018 étaient : la Guyane, Montpellier, Nancy-Metz, Nice, Orléans-Tours et Reims. Les échanges entre les référents TraAM sur leurs pistes de travail ont permis de faire émerger les problématiques de travail suivantes : 1.

Les organoïdes, une alternative à l’expérimentation animale ? Pour un peu... on se croirait face à un papillon aux couleurs psychédéliques... ou encore en présence d'une bien étrange méduse du fond des océans... Et pourtant, c'est ce qui remplacera peut-être un jour complètement l'expérimentation animale. Les organoïdes, c'est-à-dire la version miniaturisée des organes humains. Ici, un mini-cerveau, là un intestin microscopique ou encore une vessie plus petite que l'épaisseur d'un cheveu. Autant de prouesses techniques et médicales initiées il y a une dizaine d'années seulement et un peu par hasard.

The Bash Hackers Wiki Simon Peyton Jones: book Simon Peyton Jones and David Lester. Published by Prentice Hall, 1992. Now, alas, out of print. However the full text of the book is available here: Abstract This book gives a practical approach to understanding implementations of non-strict functional languages using lazy graph reduction. The unusual aspect of the book is that it is meant to be executed as well as read. Overview of the book The principal content of the book is a series of implementations of a small functional language called the Core language. Appendix B contains a selection of Core-language programs for use as test programs thoughout the book. The main body of the book consists of four distinct implementations of the Core language. Chapter 2 describes the most direct implementation, based on template instantiation. The machine interpreter simulates the execution of the compiled program. One important way in which the Core language is restrictive is in its lack of local function definitions. Typographical errors

Paul E. McKenney's Journal LIBERTE D’EXPRESSION - BLASPHEME – LAICITE - [Espace Doc Web] LIBERTE D’EXPRESSION - BLASPHEME – LAICITELe vendredi 16 octobre 2020, Samuel Paty, professeur d’histoire-géographie a été assassiné à Conflans-Sainte-Honorine, dans les Yvelines, après avoir montré des caricatures de Mahomet à ses élèves. Suite à la publication d’une vidéo en janvier 2020, dans laquelle elle critique avec véhémence l’Islam, Mila, une adolescente de 16 ans, a reçu des centaines d’insultes et menaces de mort. Deux camps s’affrontent sur les réseaux sociaux : ceux qui, avec le hashtag #JeSuisMila, soutiennent la jeune femme et le fait que le blasphème n’est pas illégal en France et ceux qui, au contraire, condamnent les propos de la jeune femme à travers le hashtag #JeNeSuisPasMila . Preuve en est que, après "Charlie", le droit au blasphème pose toujours question dans notre pays. Parcours citoyen :Le principe de laïcité est au cœur des valeurs de la République que l’ensemble des personnels ont pour mission de transmettre aux élèves. I-Liberté d’expression : définition

Les maux des mots - rts.ch - émissions - 36.9° L'aphasie et la dysphasie nous rappellent combien le langage est précieux et fragile. Lorsqu'on en est privé, ce sont tous les rapports humains qui sont bouleversés. Près d'un tiers des attaques cérébrales affectent notre capacité à parler et une tumeur cérébrale peut aussi conduire à une aphasie. Témoignages poignants de personnes touchées par ce mal. Lorsque la perte du langage nous affecte soudainement ou quand l’accident frappe un proche, on se demande aussitôt s'il ou elle va parler à nouveau. Le langage est fragile. Quand on veut parler, lire une phrase ou répéter un mot entendu, l'information est acheminée vers l'hémisphère gauche du cerveau, d'abord dans l'aire de Vernicke qui permet de comprendre ce qu'on a lu ou entendu. La dysphasie affecte la compréhension. La plasticité cérébrale n’a pas encore livré tous ses secrets. Un reportage de Christophe Ungar et Vanessa Goetelen

Help Manual - Software Changing Desktop Environments Change Repository Location Creating and Extracting compressed files File Encryption Getting Software Installing Software Linux Equivalents of Windows Programs Lite Software - Install Software Lite Software - Remove Software Lite Sources Lite Tweaks - Bootup Fix - Clear Memory - Default Web Browser - Hibernate, Suspend Lite Updates Notify PPA - Adding PPA - Removing Software Updates Country Location Uninstalling Software Updates Wine - Run Windows programs Getting Software Getting software on Linux is easier than on Windows. The vast majority of programs that you may want/need to install are all centrally located in what are called software repositories (repos). Rather than searching the web, downloading programs from various sites (some of which may not be reliable), running the installer, rebooting, etc., available software is all centrally located and available for installation in seconds. Installing Software 1. 2. type in your search query. 3. 4. 5.

Parsing Techniques - A Practical Guide Dick Grune and Ceriel J.H. Jacobs VU University Amsterdam, Amsterdam, The Netherlands Originally published by Ellis Horwood, Chichester, England, 1990; ISBN 0 13 651431 6 Description This 320-page book treats parsing in its own right, in greater depth than is found in most computer science and linguistics books. The book features a 48 page systematic bibliography containing over 400 entries. No advanced mathematical knowledge is required; the book is based on an intuitive and engineering-like understanding of the processes involved in parsing, rather than on the set manipulations used in practice. A short list of errata is available. Additional Keywords: information technology, user-interface design, compiler construction, natural language processing, pattern matching, artificial intelligence. About the authors Availability Present status of the book: New second edition ! A new, second, edition has been published, by Springer Verlag! [Dick Grune] [Ceriel Jacobs]

Augmenting APIs with Nginx and Lua. | 3scale Tech Blog Nginx as an API proxy At 3scale we are big fans nginx. Few weeks ago we launched an open-source API proxy which is basically nginx with a set of custom lua scripts that allow for simple configuration of your API proxy. How easy? There are many reasons why you should use nginx as your API proxy. Another big win of nginx is the lua support. The rationale is simple. The Victim: Sentiment API (could be any API) To show how powerful nginx and lua are we will use a simple REST API called Sentiment and augment the heck out of it without touching a single line of the API source code (which by the way is available at github). The Sentiment API is a very basic API that returns the emotional value of a word or a sentence. curl " will return a JSON with the emotional value of the word fantastic So, we have our victim. The What-If part: extending the Sentiment API There are many ways that you can extend the Sentiment API (or your own API). The Basics

Limitless Keylogger Optimized with AutoIT Infected thousands of Computers A new surge of malware has been discovered which goes on to infect hundreds of thousands of computers worldwide and allegedly steals users’ social and banking site credentials. Few days back, a list of 5 million combinations of Gmail addresses and passwords were leaked online. The search engine giant, Google said that Gmail credentials didn’t come from the security breaches of its system, rather the credentials had been stolen by phishing campaigns and unauthorized access to user accounts. Just now, we come across another similar incident where cyber criminals are using a malware which has already compromised thousands of Windows users worldwide in an effort to steal their Social Media account, Online account and Banking account Credentials. A Greek Security Researcher recently discovered a malware sample via a spam campaign (caught in a corporate honeypot), targeting large number of computers users rapidly. The Malware archive includes:

Living Networks - The Book