Paradigmas de Linguagens de Programacao - Aula #4Ismar Silveira
The document discusses different parameter passing techniques in programming languages, including pass by value, pass by reference, and pass by result/value-result. It provides examples in languages like C, C++, Java, C#, Pascal, Ada to illustrate how each technique works and the differences between them. It also covers topics like parameter modes (in, out, in-out), parameter arrays, and variable arguments.
Functional Programming in JavaScript by Luis AtencioLuis Atencio
This document provides an overview of functional programming concepts using JavaScript. It discusses thinking functionally by avoiding side effects, writing declaratively, and ensuring functions always return values. Functional techniques like currying, composition, and memoization are explained. It also covers paradigms like referential transparency and the Liskov substitution principle. The document discusses how JavaScript supports functional programming with features like closures and higher-order functions. Common libraries for functional programming in JavaScript are listed. Finally, the document covers advanced topics like functors, monads, and how they can be used for error handling.
This document summarizes top gotchas or issues with older Oracle database versions, providing examples of outdated syntax or features no longer supported. It covers 20 topics such as using record types for inserts, temporary tables, analytic functions, writing BLOBs to files, and limitations of DBMS_OUTPUT in earlier versions. The document aims to help users of aged Oracle databases avoid problems by being aware of limitations and using alternative approaches as needed.
This document summarizes new syntactic features introduced in recent versions of C#, including C# 6.0, 7.0, and 7.1. It provides examples of properties with auto-properties and initializers, lambda expressions used in properties and methods, inline variables, null expressions with null-coalescing and null-conditional operators, throw expressions, local functions, value tuples, and pattern matching. It also briefly mentions features planned for future versions like C# 7.2, 8, and beyond such as read-only references, nullable reference types, and default interface methods.
This document discusses functional programming in Python. It begins by defining functional programming and some of its key concepts like immutable data, functions as first-class citizens, and recursion. It then shows how Python supports functional programming with features like first-class functions, lambda expressions, and built-in functions like map, filter and reduce. Finally, it discusses other functional programming techniques in Python like partial function application, currying, and tail call optimization, while noting some of Python's limitations for functional programming like its non-pure nature and lack of pattern matching.
Fun with Lambdas: C++14 Style (part 1)Sumant Tambe
If virtual functions in C++ imply design patterns, then C++ lambdas imply what? What does it really mean to have lambdas in C++? Frankly, I don't know but I've a hunch: It's BIG.
Just like virtual functions open doors to the OO paradigm, lambdas open doors to a different paradigm--the functional paradigm. This talk is not a praise of functional programming or some elusive lambda-based library. (Although, I'll mention one briefly that tops my list these days.) Instead, the goal is to have fun while working our way through some mind-bending examples of C++14 lambdas. Beware, your brain will hurt! Bring your laptop and code the examples right along because that may be the fastest way to answer the quiz.
Tasks and functions allow designers to abstract commonly used Verilog code into reusable routines. Tasks can contain timing constructs and pass multiple values through input, output, and inout arguments. Functions must not contain timing constructs and return a single value. Tasks are similar to subroutines while functions are similar to functions in other languages like FORTRAN. Automatic tasks make tasks re-entrant to avoid issues with concurrent calls operating on shared variables.
This document provides a short introduction to ECMAScript and highlights some key features of ECMAScript 5 including: strict mode which detects bad programming practices; new native JSON object for parsing and stringifying JSON; new methods added to the Array and Object prototypes like indexOf, map and freeze; and property descriptors which allow defining getter/setter methods for object properties.
Declarative Type System Specification with StatixEelco Visser
In this talk I present the design of Statix, a new constraint-based language for the executable specification of type systems. Statix specifications consist of predicates that define the well-formedness of language constructs in terms of built-in and user-defined constraints. Statix has a declarative semantics that defines whether a model satisfies a constraint. The operational semantics of Statix is defined as a sound constraint solving algorithm that searches for a solution for a constraint. The aim of the design is that Statix users can ignore the execution order of constraint solving and think in terms of the declarative semantics.
A distinctive feature of Statix is its use of scope graphs, a language parametric framework for the representation and querying of the name binding facts in programs. Since types depend on name resolution and name resolution may depend on types, it is typically not possible to construct the entire scope graph of a program before type constraint resolution. In (algorithmic) type system specifications this leads to explicit staging of the construction and querying of the type environment (class table, symbol table). Statix automatically stages the construction of the scope graph of a program such that queries are never executed when their answers may be affected by future scope graph extension. In the talk, I will explain the design of Statix by means of examples.
https://eelcovisser.org/post/309/declarative-type-system-specification-with-statix
Clear PHP is a coding reference for all of us. It tracks recommendations to write clear code, avoiding the classic traps, keeping options opened for the future and preventing decayed code. Those recommendations are above coding conventions, that focuses on code writing, and code architecture, with its design patterns and conceptions. This is the first time in history where an effort was made to collect all those rules, so every project can choose among them, and define exactly his own coding standard.
(video of these slides available here http://fsharpforfunandprofit.com/fppatterns/)
In object-oriented development, we are all familiar with design patterns such as the Strategy pattern and Decorator pattern, and design principles such as SOLID.
The functional programming community has design patterns and principles as well.
This talk will provide an overview of some of these, and present some demonstrations of FP design in practice.
C++11 introduced several new features for functions and lambdas including:
1. Lambda expressions that allow the definition of anonymous inline functions.
2. The std::function wrapper that allows functions and lambdas to be used interchangeably.
3. std::bind that binds arguments to function parameters for creating function objects.
These features improved support for functional programming patterns in C++.
The document discusses various Apache Commons utilities including configuration, lang, IO, and bean utilities. It provides examples of using the Configuration utility to load property files, the StringUtils class for string operations, ToStringBuilder for object toString methods, ArrayUtils for array operations, IOUtils for input/output streams, and making classes immutable by preventing field mutation.
Debugging and Profiling C++ Template MetaprogramsPlatonov Sergey
Template metaprogramming is an emerging new direction in C++ programming for executing algorithms in compilation time. Despite all of its already proven benefits and numerous successful applications, it is yet to be accepted in industrial projects. One reason is the lack of professional software tools supporting the development of template metaprograms. A strong analogue exists between traditional runtime programs and compile-time metaprograms. This connection presents the possibility for creating development tools similar to those already used when writing runtime programs. This paper introduces Templight, a debugging framework that reveals the steps executed by the compiler during the compilation of C++ programs with templates. Templight’s features include following the instantiation chain, setting breakpoints, and inspecting metaprogram information. This framework aims to take a step forward to help template metaprogramming become more accepted in the software industry.
A small introduction on the C++14 improved static introspection of the IOD library and the C++14 web framework Silicon.
https://github.com/matt-42/silicon
https://github.com/matt-42/iod
This document discusses JavaScript functions. It covers function definitions, invocation patterns, the this keyword, and function methods like call, apply, and bind. Function definitions can be declared using the function keyword or assigned anonymously. Functions are first-class citizens that can be passed around and returned. Invocation patterns include direct invocation, method invocation, constructor invocation, and reflective invocation using call and apply. The this keyword is determined by the invocation pattern and bind can be used to set the this value.
This talk discusses abstract syntax trees, parsing, domain specific languages, interpreters, and code generation. It provides examples of turtle and Small Basic languages and their corresponding abstract syntax trees. It also discusses different approaches to language design and lists resources for learning more about functional programming languages like F# through books, websites, and Koans exercises.
Diving into HHVM Extensions (Brno PHP Conference 2015)James Titcumb
HHVM is currently gaining popularity at quite a pace, and it's a pretty exciting time for PHP runtimes. Have you ever wondered what is going on beneath this slick and super-speedy engine? I wondered that myself, so I dived into the internals of HHVM, discovering a treasure trove of awesome stuff. In this talk, I’ll show you how HHVM itself works with a guided tour of the codebase, demonstrating how it all pieces together. I’ll also show you a couple of ways to write your own incredible HHVM extension. You don't need to know C++ to understand this talk - just PHP language knowledge is enough.
This document summarizes an introductory workshop on JavaScript ES6/7/8 features. It discusses what ES stands for and how versioning works. Key topics that will be covered in the workshop include importing modules, arrow functions, spread/rest operators, classes, let & constants, template literals, object literals, destructuring, and more. Links are provided for code examples on CodePen to demonstrate each feature. The document also discusses how newer JavaScript features like promises and async/await help solve issues like "callback hell" from previous versions.
This document provides an overview of an ES6 hackathon focusing on new features in ES6 including block scope, modules, destructuring, arrow functions, classes, template literals, internationalization, spread syntax, generators, sets, promises and more. Attendees will have 30 minutes to work on code challenges exploring these new ES6 features using resources like JSFiddle and TypeScript. The challenges involve updating functions to use new syntax like arrow functions, default parameters and object shorthand, satisfying class assertions, and improving outputs using template strings and internationalization.
The document summarizes 10 new features in ECMAScript 2015 (ES6):
1. Default parameters allow defining function parameters that can be omitted when calling a function.
2. Rest parameters collect multiple function arguments into an array.
3. Spread syntax expands iterables like arrays into individual arguments.
4. Let and const introduce block scope and prevent redeclaration of variables.
5. Classes provide syntactic sugar over prototype-based inheritance.
6. Enhanced object literals allow omitting repeated name/value pairs and adding methods.
7. Template literals allow multiline strings and embedded expressions.
8. Object.assign copies enumerable own properties from one or more source objects to a target
This document discusses ECMAScript 2015 (ES2015), also known as ES6. It provides examples of new ES2015 features like arrow functions, template literals, classes, and modules. It also discusses how to set up a development environment to use ES2015, including transpiling code to ES5 using Babel, linting with Eslint, testing with Mocha, and generating coverage reports with Istanbul. The document emphasizes that while ES2015 is fun to explore, proper tooling like linting and testing is needed for serious development. It concludes by noting ES2015 marks a transition and thanks the audience.
This document discusses ES6 features and best practices for using them. It covers new features like let and const, arrow functions, classes, modules, destructuring, default parameters, and promises. It emphasizes keeping code simple, using context appropriately, and favoring powerful yet simple features. Tools like Babel, Gulp and Karma are recommended for compiling, building workflows and testing ES6 code.
This document discusses using functional programming techniques in Java to improve KPIs like quality, performance, and developer productivity. It outlines issues with imperative Java like shared mutability and verbosity. Functional approaches can reduce bugs, duplicated code, and complexity. Techniques like immutable collections, streams, and lambdas improve performance by reducing memory usage and garbage collection. Functional Java allows writing more concise, testable code while leveraging the existing Java ecosystem.
Groovy is a dynamic language for the Java Virtual Machine that simplifies programming through features like closures, properties, and built-in support for lists, maps, ranges, and regular expressions. The latest version 1.5 adds support for Java 5 features like annotations and generics to leverage frameworks that use them. Groovy can be integrated into applications through mechanisms like JSR-223, Spring, and Groovy's own GroovyClassLoader to externalize business rules, provide extension points, and customize applications.
The document discusses Objective-J, a JavaScript implementation that adds features from other languages like Ruby and Python. It highlights features like classical inheritance, dynamic dispatch, and method missing. It also discusses debugging tools for JavaScript like profile views. Finally, it provides links to learn more about Cappuccino and Objective-J.
TypeScript is a typed superset of JavaScript created by Microsoft that compiles to plain JavaScript. It adds optional static typing, classes, and interfaces to JavaScript to help catch errors. TypeScript solves problems like type safety, module organization, and provides type checking but does not make code run faster or solve logical mistakes. Declaration files also allow TypeScript to work with common JavaScript libraries.
JavaScript provides core functionality for web pages and applications. It has a C-like syntax and is dynamically typed. JavaScript code runs on both the client-side in web browsers and the server-side in environments like Node.js. It uses prototype-based inheritance where objects can inherit properties from object prototypes. New features are being added regularly through the ECMAScript specification. JavaScript allows DOM manipulation to modify web pages and event handling for user interactions.
Preparing for the next PHP version (5.6)Damien Seguy
With versions stretching from 5.3 to 5.6, PHP has several major published versions, that require special attention when migrating. Beyond checking for compilation, the code must be reviewed to avoid pitfalls like obsoletes functions, new features, change in default parameters or behavior. We'll set up a checklist of such traps, and ways to find them in the code and be reading for PHP 5.6.
Typescript fundamentals document summarized in 3 sentences:
The document discusses Typescript fundamentals including types, classes, interfaces, modules and how to use the Typescript compiler. It explains how Typescript adds type safety and compile time checking to JavaScript by using types for variables, parameters, returns and more. Examples are provided for many Typescript features and how they compile down to equivalent JavaScript.
Sperasoft talks about several important aspects of ECMAScript6 - language widely used for client-side scripting on the web, in the form of several well-known implementations such as JavaScript, JScript and ActionScript.
Design Summit - UI Roadmap - Dan Clarizio, Martin PovolnyManageIQ
The UI, while fullty-features, is intimidating to new users. The roadmap for the UI is to make it more intuitive and navigable for new users.
For more on ManageIQ, see http://manageiq.org/
This document discusses ES6, the new version of JavaScript, and provides an overview of some of its key features including classes, iterators, lambdas, string interpolation, modules, and let block scoping. It encourages readers to begin using ES6 today by leveraging transpilation tools like Babel that allow ES6 code to run on current browsers and platforms. The best resource mentioned for learning ES6 is the Babel website, which contains tutorials, a live code editor, and helps developers get started with ES6.
Node.js behind: V8 and its optimizationsDawid Rusnak
Do you know how really your code is working behind? It’s very useful to be aware of mechanisms and optimizations which your engine will perform. I will tell you how your code is processed and run, and how it could affect you in day-by-day development.
Performed at Code Europe 2017: https://www.codeeurope.pl
Version 1.2 of the document introduces new versions of PHP including PHP 5.6 and PHP 7. PHP 5.6 included new features like constant expressions, variadic functions, and exponentiation. PHP 7 included major performance improvements and introduced scalar type declarations, return type declarations, and new operators like the nullsafe operator and spaceship comparison operator. PHP 7 also removed alternative PHP tags and deprecated old PHP codes. Future versions of PHP will focus on additional type declarations and other new language features.
Some javascript testing patterns that has made writing tests at Refinery29 more maintainable. Covered in this presentation is userContext (or let) in Jasmine, lazy evaluation and shared behavior.
The why and how of moving to PHP 5.4/5.5Wim Godden
With PHP 5.5 out and many production environments still running 5.2 (or older), it's time to paint a clear picture on why everyone should move to 5.4 and 5.5 and how to get code ready for the latest version of PHP. In this talk, we'll migrate an old piece of code using some standard and some very non-standard tools and techniques.
Similar to Ecmascript 2015 – best of new features() (20)
Understanding Cybersecurity Breaches: Causes, Consequences, and PreventionBert Blevins
Cybersecurity breaches are a growing threat in today’s interconnected digital landscape, affecting individuals, businesses, and governments alike. These breaches compromise sensitive information and erode trust in online services and systems. Understanding the causes, consequences, and prevention strategies of cybersecurity breaches is crucial to protect against these pervasive risks.
Cybersecurity breaches refer to unauthorized access, manipulation, or destruction of digital information or systems. They can occur through various means such as malware, phishing attacks, insider threats, and vulnerabilities in software or hardware. Once a breach happens, cybercriminals can exploit the compromised data for financial gain, espionage, or sabotage. Causes of breaches include software and hardware vulnerabilities, phishing attacks, insider threats, weak passwords, and a lack of security awareness.
The consequences of cybersecurity breaches are severe. Financial loss is a significant impact, as organizations face theft of funds, legal fees, and repair costs. Breaches also damage reputations, leading to a loss of trust among customers, partners, and stakeholders. Regulatory penalties are another consequence, with hefty fines imposed for non-compliance with data protection regulations. Intellectual property theft undermines innovation and competitiveness, while disruptions of critical services like healthcare and utilities impact public safety and well-being.
A vernier caliper is a precision instrument used to measure dimensions with high accuracy. It can measure internal and external dimensions, as well as depths.
Here is a detailed description of its parts and how to use it.
Unblocking The Main Thread - Solving ANRs and Frozen FramesSinan KOZAK
In the realm of Android development, the main thread is our stage, but too often, it becomes a battleground where performance issues arise, leading to ANRS, frozen frames, and sluggish Uls. As we strive for excellence in user experience, understanding and optimizing the main thread becomes essential to prevent these common perforrmance bottlenecks. We have strategies and best practices for keeping the main thread uncluttered. We'll examine the root causes of performance issues and techniques for monitoring and improving main thread health as wel as app performance. In this talk, participants will walk away with practical knowledge on enhancing app performance by mastering the main thread. We'll share proven approaches to eliminate real-life ANRS and frozen frames to build apps that deliver butter smooth experience.
A brand new catalog for the 2024 edition of IWISS. We have enriched our product range and have more innovations in electrician tools, plumbing tools, wire rope tools and banding tools. Let's explore together!
A brief introduction to quadcopter (drone) working. It provides an overview of flight stability, dynamics, general control system block diagram, and the electronic hardware.
Exploring Deep Learning Models for Image Recognition: A Comparative Reviewsipij
Image recognition, which comes under Artificial Intelligence (AI) is a critical aspect of computer vision,
enabling computers or other computing devices to identify and categorize objects within images. Among
numerous fields of life, food processing is an important area, in which image processing plays a vital role,
both for producers and consumers. This study focuses on the binary classification of strawberries, where
images are sorted into one of two categories. We Utilized a dataset of strawberry images for this study; we
aim to determine the effectiveness of different models in identifying whether an image contains
strawberries. This research has practical applications in fields such as agriculture and quality control. We
compared various popular deep learning models, including MobileNetV2, Convolutional Neural Networks
(CNN), and DenseNet121, for binary classification of strawberry images. The accuracy achieved by
MobileNetV2 is 96.7%, CNN is 99.8%, and DenseNet121 is 93.6%. Through rigorous testing and analysis,
our results demonstrate that CNN outperforms the other models in this task. In the future, the deep
learning models can be evaluated on a richer and larger number of images (datasets) for better/improved
results.
An Internet Protocol address (IP address) is a logical numeric address that is assigned to every single computer, printer, switch, router, tablets, smartphones or any other device that is part of a TCP/IP-based network.
Types of IP address-
Dynamic means "constantly changing “ .dynamic IP addresses aren't more powerful, but they can change.
Static means staying the same. Static. Stand. Stable. Yes, static IP addresses don't change.
Most IP addresses assigned today by Internet Service Providers are dynamic IP addresses. It's more cost effective for the ISP and you.
Conservation of Taksar through Economic RegenerationPriyankaKarn3
This was our 9th Sem Design Studio Project, introduced as Conservation of Taksar Bazar, Bhojpur, an ancient city famous for Taksar- Making Coins. Taksar Bazaar has a civilization of Newars shifted from Patan, with huge socio-economic and cultural significance having a settlement of about 300 years. But in the present scenario, Taksar Bazar has lost its charm and importance, due to various reasons like, migration, unemployment, shift of economic activities to Bhojpur and many more. The scenario was so pityful that when we went to make inventories, take survey and study the site, the people and the context, we barely found any youth of our age! Many houses were vacant, the earthquake devasted and ruined heritages.
Conservation of those heritages, ancient marvels,a nd history was in dire need, so we proposed the Conservation of Taksar through economic regeneration because the lack of economy was the main reason for the people to leave the settlement and the reason for the overall declination.
Conservation of Taksar through Economic Regeneration
Ecmascript 2015 – best of new features()
1. ECMASCRIPT 2015
BEST OF NEW FEATURES().
by / atMiłosz Sobczak @miloszsobczak
Main example source code can be found at github.com/miloszsobczak/es6-rewrite.
7. CLASSES SUPER ACCESS
ECMASCRIPT 5 OLD WAY
//base class constructor
Developer.call(this, name, experience, languages);
//method access
Developer.prototype.method.call(this);
8. CLASSES SUPER ACCESS
ECMASCRIPT 2015 (6)
//base class constructor
super(name, experience, languages);
//method access
super.method()
9. CLASSES STATIC FUNCTION
ECMASCRIPT 5 OLD WAY
PixersDeveloper.prototype.default = function () {
return new PixersDeveloper('Mieszkos', 2, ['Whitespace'], -1000)
}
//usage
var Mieszkos = PixersDeveloper.default();
10. CLASSES STATIC FUNCTION
ECMASCRIPT 2015 (6)
static default () {
return new PixersDeveloper('Mieszkos', 2, ['Whitespace'], -1000);
}
//usage
var Mieszkos = PixersDeveloper.default();
11. CLASSES SETTER/GETTER
ECMASCRIPT 5 OLD WAY
Described in ecmascript 5.0 (not in 5.1).
PixersDeveloper.prototype.awesomeness = function (value) {
if (typeof value === 'number') {
this._awesomeness = parseInt(value, 10);
}
return this._awesomeness;
}
//setter usage
this.awesomeness(10);
//getter usage
var dev_awesomness = this.awesomeness();
12. CLASSES SETTER/GETTER
ECMASCRIPT 2015 (6)
set awesomeness (value = 0) {
if (typeof value === 'number') {
this._awesomeness = parseInt(value, 10);
}
}
get awesomeness () {
return this._awesomeness;
}
//setter usage
this.awesomeness = 10;
//getter usage
var dev_awesomness = this.awesomeness;
13. CLASSES EXTENDING
ECMASCRIPT 5 OLD WAY
BUILT-INS
function MyArray(/*arguments*/) {
var arr = [];
Array.prototype.push.apply(arr, arguments);
copyOwnPropertiesFrom(arr, MyArray.methods);
return arr;
}
var a = new MyArray();
a instanceof MyArray; //false
a instanceof Array; //true
14. CLASSES EXTENDING BUILT-INS
ECMASCRIPT 2015 (6)
class MyArray extends Array {
constructor(...args) {
super(args);
}
}
//ex below still gives an error, but it shuldn't
class myMath extends Math {}
21. BLOCKS && SCOPE VARIABLES:
CONSTS
ECMASCRIPT 5 OLD WAY
//simple and cross-browser, but still writable
var PI = 3.141593;
//or complicatated and not writable
Object.defineProperty(window, 'PI', {
value: 3.141593,
enumerable: true,
writable: false,
configurable: false
});
22. BLOCKS && SCOPE VARIABLES:
CONSTS
ECMASCRIPT 2015 (6)
const PI = 3.141593;
const PI = 1; //Uncaught TypeError: Identifier 'PI' has already been declare
var PI = 2; //3.141593
23. BLOCKS && SCOPE VARIABLES: LET
ECMASCRIPT 5 OLD WAY
var a = 2;
(function own_scope(){
var a = 3;
console.log( a ); // 3
})();
console.log( a ); // 2
24. BLOCKS && SCOPE VARIABLES: LET
ECMASCRIPT 2015 (6)
var a = 2;
{
let a = 3;
console.log( a ); // 3
}
console.log( a ); // 2
28. ARROW FUNCTIONS: CURRENT
OBJECT CONTEXT
ECMASCRIPT 5 OLD WAY
var self = this;
return (function anonymus(points) {
var points = points || 0;
//do something with points
return self.name() + ' is a Developer';
})(countPoints(this.languages().length, this.experience()));
29. ARROW FUNCTIONS: CURRENT
OBJECT CONTEXT
ECMASCRIPT 2015 (6)
return ((points = 0) => {
//do something with points
return this.name + ' is a Developer';
})(countPoints(this.languages.length, this.experience));