JavaScript is evolving. It’s an exciting time to be involved with this ubiquitous language of the web. Every year, we get exciting new features landing as part of the language. Let’s explore the freshly released features that were part of the 2019 ECMAScript specification. We’ll also briefly explore the process of how new features get proposed and added to the language, as well as the leading contenders expected to land in ES2020.
I am Boris M. I am a Computer Science Assignment Help Expert at programminghomeworkhelp.com. I hold an MSc. in Programming, McGill University, Canada. I have been helping students with their homework for the past 8years. I solve assignments related to Computer Science.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.You can also call on +1 678 648 4277 for any assistance with Computer Science assignments.
I am Andrew O. I am a Computer Science Assignment Help Expert at programminghomeworkhelp.com. I hold a Ph.D. in Programming, Southampton, UK. I have been helping students with their homework for the past 10 years. I solve assignments related to Computer Science.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.You can also call on +1 678 648 4277 for any assistance with Computer Science assignments.
I am Kepha M. I am a Control System Assignment Expert at matlabassignmentexperts.com. I hold a Ph.D. in Matlab, McGill University, Canada. I have been helping students with their homework for the past 8 years. I solve assignments related to Control Systems.
Visit matlabassignmentexperts.com or email info@matlabassignmentexperts.com.
You can also call on +1 678 648 4277 for any assistance with Control System Assignments.
Building High-Performance Language Implementations With Low EffortStefan Marr
This talk shows how languages can be implemented as self-optimizing interpreters, and how Truffle or RPython go about to just-in-time compile these interpreters to efficient native code.
Programming languages are never perfect, so people start building domain-specific languages to be able to solve their problems more easily. However, custom languages are often slow, or take enormous amounts of effort to be made fast by building custom compilers or virtual machines.
With the notion of self-optimizing interpreters, researchers proposed a way to implement languages easily and generate a JIT compiler from a simple interpreter. We explore the idea and experiment with it on top of RPython (of PyPy fame) with its meta-tracing JIT compiler, as well as Truffle, the JVM framework of Oracle Labs for self-optimizing interpreters.
In this talk, we show how a simple interpreter can reach the same order of magnitude of performance as the highly optimizing JVM for Java. We discuss the implementation on top of RPython as well as on top of Java with Truffle so that you can start right away, independent of whether you prefer the Python or JVM ecosystem.
While our own experiments focus on SOM, a little Smalltalk variant to keep things simple, other people have used this approach to improve peek performance of JRuby, or build languages such as JavaScript, R, and Python 3.
This presentation begins by reviewing the Task Parallel Library APIs, introduced in .NET 4.0 and expanded in .NET 4.5 -- the Task class, Parallel.For and Parallel.ForEach, and even Parallel LINQ. Then, we look at patterns and practices for extracting concurrency and managing dependencies, with real examples like Levenstein's edit distance algorithm, Fast Fourier Transform, and others.
These are the slides I was using in a short Kotlin crash course I delivered in Google Campus (Tel-Aviv) on May 14th 2018. More info about this event can be found at https://www.meetup.com/life-michael/events/243709706/ More info about my company professional training services for software developers can be found at http://www.lifemichael.com. More information about the Kotlin professional course I deliver can be found at kotlin.course.lifemichael.com.
I am Gill K. I am an Operating System Assignment Expert at programminghomeworkhelp.com. I hold a PhD. in Programming at Manchester University, UK. I have been helping students with their homework for the past 6 years. I solve assignments related to Operating System Assignment.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.
You can also call on +1 678 648 4277 for any assistance with Operating System Assignment.
Zero-Overhead Metaprogramming: Reflection and Metaobject Protocols Fast and w...Stefan Marr
Runtime metaprogramming enables many useful applications and is often a convenient solution to solve problems in a generic way, which makes it widely used in frameworks, middleware, and domain-specific languages. However, powerful metaobject protocols are rarely supported and even common concepts such as reflective method invocation or dynamic proxies are not optimized. Solutions proposed in literature either restrict the metaprogramming capabilities or require application or library developers to apply performance improving techniques.
For overhead-free runtime metaprogramming, we demonstrate that dispatch chains, a generalized form of polymorphic inline caches common to self-optimizing interpreters, are a simple optimization at the language-implementation level. Our evaluation with self-optimizing interpreters shows that unrestricted metaobject protocols can be realized for the first time without runtime overhead, and that this optimization is applicable for just-in-time compilation of interpreters based on meta-tracing as well as partial evaluation. In this context, we also demonstrate that optimizing common reflective operations can lead to significant performance improvements for existing applications.
Pablo Magaz | ECMAScript 2018 y más allá | Codemotion Madrid 2018Codemotion
ECMAScript 2018 o simplemente ES2018, es la última revisión de nuestro lenguaje favorito y ha llegado con interesantes novedades que, sin lugar a dudas, cambiarán la forma en la que trabajaremos con el lenguaje en los próximos años. A lo largo de la charla repasaremos, no solo las novedades incluidas en la especificación ES2018 si no que echaremos un vistazo a las propuestas de la próxima especificación ES2019. Una mirada al futuro de JavaScript.
Find out more presentations at https://madrid2018.codemotionworld.com/speakers/
I am Boris M. I am a Computer Science Assignment Help Expert at programminghomeworkhelp.com. I hold an MSc. in Programming, McGill University, Canada. I have been helping students with their homework for the past 8years. I solve assignments related to Computer Science.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.You can also call on +1 678 648 4277 for any assistance with Computer Science assignments.
I am Andrew O. I am a Computer Science Assignment Help Expert at programminghomeworkhelp.com. I hold a Ph.D. in Programming, Southampton, UK. I have been helping students with their homework for the past 10 years. I solve assignments related to Computer Science.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.You can also call on +1 678 648 4277 for any assistance with Computer Science assignments.
I am Kepha M. I am a Control System Assignment Expert at matlabassignmentexperts.com. I hold a Ph.D. in Matlab, McGill University, Canada. I have been helping students with their homework for the past 8 years. I solve assignments related to Control Systems.
Visit matlabassignmentexperts.com or email info@matlabassignmentexperts.com.
You can also call on +1 678 648 4277 for any assistance with Control System Assignments.
Building High-Performance Language Implementations With Low EffortStefan Marr
This talk shows how languages can be implemented as self-optimizing interpreters, and how Truffle or RPython go about to just-in-time compile these interpreters to efficient native code.
Programming languages are never perfect, so people start building domain-specific languages to be able to solve their problems more easily. However, custom languages are often slow, or take enormous amounts of effort to be made fast by building custom compilers or virtual machines.
With the notion of self-optimizing interpreters, researchers proposed a way to implement languages easily and generate a JIT compiler from a simple interpreter. We explore the idea and experiment with it on top of RPython (of PyPy fame) with its meta-tracing JIT compiler, as well as Truffle, the JVM framework of Oracle Labs for self-optimizing interpreters.
In this talk, we show how a simple interpreter can reach the same order of magnitude of performance as the highly optimizing JVM for Java. We discuss the implementation on top of RPython as well as on top of Java with Truffle so that you can start right away, independent of whether you prefer the Python or JVM ecosystem.
While our own experiments focus on SOM, a little Smalltalk variant to keep things simple, other people have used this approach to improve peek performance of JRuby, or build languages such as JavaScript, R, and Python 3.
This presentation begins by reviewing the Task Parallel Library APIs, introduced in .NET 4.0 and expanded in .NET 4.5 -- the Task class, Parallel.For and Parallel.ForEach, and even Parallel LINQ. Then, we look at patterns and practices for extracting concurrency and managing dependencies, with real examples like Levenstein's edit distance algorithm, Fast Fourier Transform, and others.
These are the slides I was using in a short Kotlin crash course I delivered in Google Campus (Tel-Aviv) on May 14th 2018. More info about this event can be found at https://www.meetup.com/life-michael/events/243709706/ More info about my company professional training services for software developers can be found at http://www.lifemichael.com. More information about the Kotlin professional course I deliver can be found at kotlin.course.lifemichael.com.
I am Gill K. I am an Operating System Assignment Expert at programminghomeworkhelp.com. I hold a PhD. in Programming at Manchester University, UK. I have been helping students with their homework for the past 6 years. I solve assignments related to Operating System Assignment.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.
You can also call on +1 678 648 4277 for any assistance with Operating System Assignment.
Zero-Overhead Metaprogramming: Reflection and Metaobject Protocols Fast and w...Stefan Marr
Runtime metaprogramming enables many useful applications and is often a convenient solution to solve problems in a generic way, which makes it widely used in frameworks, middleware, and domain-specific languages. However, powerful metaobject protocols are rarely supported and even common concepts such as reflective method invocation or dynamic proxies are not optimized. Solutions proposed in literature either restrict the metaprogramming capabilities or require application or library developers to apply performance improving techniques.
For overhead-free runtime metaprogramming, we demonstrate that dispatch chains, a generalized form of polymorphic inline caches common to self-optimizing interpreters, are a simple optimization at the language-implementation level. Our evaluation with self-optimizing interpreters shows that unrestricted metaobject protocols can be realized for the first time without runtime overhead, and that this optimization is applicable for just-in-time compilation of interpreters based on meta-tracing as well as partial evaluation. In this context, we also demonstrate that optimizing common reflective operations can lead to significant performance improvements for existing applications.
Pablo Magaz | ECMAScript 2018 y más allá | Codemotion Madrid 2018Codemotion
ECMAScript 2018 o simplemente ES2018, es la última revisión de nuestro lenguaje favorito y ha llegado con interesantes novedades que, sin lugar a dudas, cambiarán la forma en la que trabajaremos con el lenguaje en los próximos años. A lo largo de la charla repasaremos, no solo las novedades incluidas en la especificación ES2018 si no que echaremos un vistazo a las propuestas de la próxima especificación ES2019. Una mirada al futuro de JavaScript.
Find out more presentations at https://madrid2018.codemotionworld.com/speakers/
Standardizing JavaScript Decorators in TC39 (Full Stack Fest 2019)Igalia
By Daniel Ehrenberg.
JavaScript decorators were created in 2014 as a collaboration among the JavaScript ecosystem, and you've been able to use them in TypeScript and Babel. But they didn't make it into the JavaScript standard yet: not ES6, or any of the later versions, so far. We're working on standardizing decorators in TC39, the JavaScript standards committee, but some changes are required from the initial version.
In this talk, Daniel will explain what TC39 is and how we work. We'll look at some newer language feature proposals, such as Temporal and immutable records and tuples, and follow how decorators have been proceeding through the TC39 process, including why and how they're changing. TC39 could use your help in moving JavaScript forward.
(c) Full Stack Fest 2019
Sitges, Barcelona
September 4—6, 2019
https://2019.fullstackfest.com/
Composing an App with Free Monads (using Cats)Hermann Hueck
In this talk I will explain what Free Monads are and how to use them (using the Cats implementation).
After having shown the basics I build a small app by composing several
Free Monads to a small program.
I discuss the pros and cons of this technique.
Finally I will demonstrate how to avoid some boilerplate with the FreeK library.
This presentation was held at the Stockholm Rust Meetup in September 2019.
This is a brief introduction to Rust and highlights some of the problems with C++ that it attempts to solve. It also contain a brief introduction to the ownership model and the borrow checker that Rust uses.
Final Project SkeletonCipherClient.javaFinal Project SkeletonC.docxvoversbyobersby
Final Project Skeleton/CipherClient.javaFinal Project Skeleton/CipherClient.javaimport java.io.*;
import java.net.*;
import java.security.*;
import javax.crypto.*;
publicclassCipherClient
{
publicstaticvoid main(String[] args)throwsException
{
String message ="The quick brown fox jumps over the lazy dog.";
String host ="paradox.sis.pitt.edu";
int port =7999;
Socket s =newSocket(host, port);
// YOU NEED TO DO THESE STEPS:
// -Generate a DES key.
// -Store it in a file.
// -Use the key to encrypt the message above and send it over socket s to the server.
}
}
Final Project Skeleton/CipherServer.javaFinal Project Skeleton/CipherServer.javaimport java.io.*;
import java.net.*;
import java.security.*;
import javax.crypto.*;
publicclassCipherServer
{
publicstaticvoid main(String[] args)throwsException
{
int port =7999;
ServerSocket server =newServerSocket(port);
Socket s = server.accept();
// YOU NEED TO DO THESE STEPS:
// -Read the key from the file generated by the client.
// -Use the key to decrypt the incoming message from socket s.
// -Print out the decrypt String to see if it matches the orignal message.
}
}
Final Project Skeleton/ElGamalAlice.javaFinal Project Skeleton/ElGamalAlice.javaimport java.io.*;
import java.net.*;
import java.security.*;
import java.math.BigInteger;
publicclassElGamalAlice
{
privatestaticBigInteger computeY(BigInteger p,BigInteger g,BigInteger d)
{
// IMPLEMENT THIS FUNCTION;
}
privatestaticBigInteger computeK(BigInteger p)
{
// IMPLEMENT THIS FUNCTION;
}
privatestaticBigInteger computeA(BigInteger p,BigInteger g,BigInteger k)
{
// IMPLEMENT THIS FUNCTION;
}
privatestaticBigInteger computeB(String message,BigInteger d,BigInteger a,BigInteger k,BigInteger p)
{
// IMPLEMENT THIS FUNCTION;
}
publicstaticvoid main(String[] args)throwsException
{
String message ="The quick brown fox jumps over the lazy dog.";
String host ="paradox.sis.pitt.edu";
int port =7999;
Socket s =newSocket(host, port);
ObjectOutputStream os =newObjectOutputStream(s.getOutputStream());
// You should consult BigInteger class in Java API documentation to find out what it is.
BigInteger y, g, p;// public key
BigInteger d;// private key
int mStrength =1024;// key bit length
SecureRandom mSecureRandom =newSecureRandom();// a cryptographically strong pseudo-random number
// Create a BigInterger with mStrength bit length that is highly likely to be prime.
// (The '16' determines the probability that p is prime. Refer to BigInteger documentation.)
p =newBigInteger(mStrength,16, mSecureRandom);
// Create a randomly generated BigInteger of length mStrength-1
g =newBigInteger(mStrength-1, mSecureRandom);
d =newBigInteger(mStrength-1, mSecureRandom);
y = computeY(p, g, d);
// At this point, you have both the public key and the private key. Now compute the signature.
BigInteger k = computeK(p);
BigInteger a = computeA(p, g, k);
BigInteger b = computeB(message, d, a, k, p);
// send public key
...
[C++] The Curiously Recurring Template Pattern: Static Polymorphsim and Expre...Francesco Casalegno
••• Exploit the full potential of the CRTP! •••
In this presentation you will learn:
▸ what is the curiously recurring template pattern
▸ the actual cost (memory and time) of virtual functions
▸ how to implement static polymorphism
▸ how to implement expression templates to avoid loops and copies
Programming smart contracts in solidityEmanuel Mota
Ethereum Overview and what are Smart Contracts and what are their limitations. A Solidity programming language Crash Course. How to create an ERC20 token. What is an ICO on Ethereum.
Part presentation, part debate about the future of the language while touching base on the current state of the industry with respect to ES6/ES2015, and the possibilities of using it today in web applications and frameworks, the different options, and the things to keep in mind. Additionally, we will do a walk-through on the new features included in ES7/ES2016 draft, and those that are being discussed for ES8/ES2017.
Water billing management system project report.pdfKamal Acharya
Our project entitled “Water Billing Management System” aims is to generate Water bill with all the charges and penalty. Manual system that is employed is extremely laborious and quite inadequate. It only makes the process more difficult and hard.
The aim of our project is to develop a system that is meant to partially computerize the work performed in the Water Board like generating monthly Water bill, record of consuming unit of water, store record of the customer and previous unpaid record.
We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
2. "Any application that can be
written in JavaScript, will
eventually by written in
JavaScript."
- Jeff Atwood, Co-founder of StackOverflow
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3. We are 10.7 million developers
worldwide.
Together we support over 4.1 billion
users of the web.
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4. Me, back in the day
Arrays
for (var i = 0; i < students.length; i++) {
newStudents.push(transform(students[i]));
}
Strings
...we write JavaScript very differently now.
var message = name + ', You have $' + dollars + ' in your account.
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6. What we're talking about
ECMAScript, a brief, not at all complete, history
So, what is new in ES2019?
How do proposals turn into features?
ESNext proposals
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8. Mocha is born
Brendan Eich creates
Mocha in 10 days
Java is really new and
trendy. JavaScript is
marketed as the
lightweight cousin.
Eventually renamed to
JavaScript in December
1995
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10. ECMA
Netscape approaches the European Computer Manufacturers
Association.
JavaScript and JScript are implementations.
The spec is called ECMAScript.
ECMAScript 1 released in 1997.
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14. Array.prototype.flatMap
With map() every element is translated to exactly one output
element.
With flatMap() every element can be transformed into a variable
number of elements.
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15. Working with data
// Folder = { files: [] }
const folders = [folder1, folder2, ...];
const toFiles = folder => folder.files;
// Alternative
const result = folders.map(toFiles).flat(1);
const result = folders.flatMap(toFiles);
// result = [file1, file2, file3, ...];
// Before flatMap, not performant
const result = folders.reduce(
(acc, folder) => acc.concat(folder.files)
, []);
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25. The TC39 proposal process
Technical committee 39 of ECMA International
ECMA 262 specification
Members are implementers that send delegates
Committee meets six times a year
A new process was defined after ES4 was abandoned, and ES6
was a massive release that took 6 years.
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27. Stage 1 (Proposal)
Identified champion or champions who will advance the
addition.
Describe the problem or requirement
High level API
Potential concerns have been identified
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28. Stage 2 (Draft)
Initial spec text
Incremental changes expected
The committee expects the feature to be developed and
eventually included in the standard
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29. Stage 3 (Candidate)
At this stage, the proposal is considered complete
No further work is possible without implementation experience
Only changes considered critical based on implementation
experience
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30. Classes right now
Classes were added in ES6
class Counter {
constructor() {
this.min = 0;
this.max = 100;
this._count = 0;
}
get count() {
return this._count;
}
increment() {
this._count++;
}
decrement() {
this._count--;
}
}
Counter.someStaticProp = 'Static';
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31. As a User
const counter = new Counter();
console.log(counter.count); // 0
counter._count = 42;
console.log(counter.count); // 42
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34. As a User
const counter = new Counter();
console.log(counter.#count);
// SyntaxError
counter.#count = 42;
// SyntaxError
counter.count = 42;
// Tries to assign to the public field
Private class fields supported in Chrome 74, Node 12
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35. Property access in JavaScript
// TypeError prone
const streetName = user.address.streetName;
// Pleasure to read
let streetName = user &&
user.address &&
user.address.streetName;
// Even better, ternaries
const streetName = user ? (
user.address ?
user.address.streetName : undefined
) : undefined;
35 / 48
36. Say ?. (Stage 3)
Enter optional chaining.
Optional chaining operator: ?.
Short circuits if encounters a nullish value.
Available as a Babel plugin, TypeScript 3.7
const streetName = user?.address?.streetName;
const street = user?.getAddress()?.streetName;
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37. Assigning default values
const donut = incomingDonut ? incomingDonut : defaultDonut;
// alternative
const donut = incomingDonut || defaultDonut;
// except if this is a number, catch the zero's
// Or a boolean?!
const num = incomingNum == null ? defaultNum : incomingNum;
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38. Nullish Coalescing Operator
const num = incomingNum ?? defaultNum;
Checks if a value is nullish.
In Kotlin, this is called the Elvis operator.
Available as a Babel plugin, TypeScript 3.7
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39. Bringing it all together 💯
Soon, we could be writing code like this!
const streetName = user?.address?.streetName ?? 'No Street.';
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40. Stage 4 (Finished)
Spec editor has signed off.
Ready to be included in the spec.
Test262 acceptance tests have been merged.
Two spec compliant implementations exist.
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41. Numbers in JavaScript
Number can only represent values up to 253 - 1
const max = Number.MAX_SAFE_INTEGER;
// 9_007_199_254_740_991
max + 1;
// 9_007_199_254_740_992 ✅
max + 2;
// 9_007_199_254_740_992 ❌
(max + 1) === (max + 2);
// true 🤯
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42. BigInt 🎉
A new primitive
Arbitrary precision integers
Works as expected with arithmetic operators
Does not work with Math functions
Chrome, Firefox, Node 12+
BigInt(Number.MAX_SAFE_INTEGER);
// 9_007_199_254_740_991n
BigInt(Number.MAX_SAFE_INTEGER) + 2n;
// 9_007_199_254_740_993n ✅
typeof 100;
// 'number'
typeof 100n;
// 'bigint'
100n + 100;
// TypeError
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43. Promise.allSettled
Promise.all added in 2015
Promise.all short-circuits when one of the promises fails
Promise.allSettled returns a promise that resolves when each of
the promises has either been fulfilled or rejected.
const promise1 = Promise.resolve(3);
const promise2 = new Promise((resolve, reject) =>
setTimeout(reject, 100, 'foo'));
const promises = [promise1, promise2];
const results = await Promise.allSettled(promises);
results.forEach(result => console.log(result.status));
// expected output:
// "fulfilled"
// "rejected"
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44. globalThis
So many JavaScript environments and all the related global
objects.
// A naive attempt at getting the global `this`. Don’t use this!
const getGlobalThis = () => {
if (typeof globalThis !== 'undefined') return globalThis;
if (typeof self !== 'undefined') return self;
if (typeof window !== 'undefined') return window;
if (typeof global !== 'undefined') return global;
// Note: this might still return the wrong result!
if (typeof this !== 'undefined') return this;
throw new Error('Unable to locate global `this`');
};
const theGlobalThis = getGlobalThis();
Now we just have globalThis, yay portability!
Unified mechanism to access the global this in any
environment.
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45. Recap ESNext
ECMAScript is evolved by the TC39 committee
A new version is released every year
Proposals can change till they reach Stage 4
Stage 3 proposals-
Class enhancements
Optional chaining
Nullish Coalescing
Stage 4 proposals-
BigInt
Promise.allSettled
globalThis
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46. Conclusion
JavaScript has come a long way since its inception in 1995.
We are a passionate, diverse and vocal community.
As a member of this community, you can participate in its
evolution!
Always bet on JavaScript! 🚀
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