Jane Aglo

Jane Aglo

1575356846

How Technology can help Restaurants To Serve Millennial & Gen Z Better

Gen Z and Millennials are the powersource to Restaurants nowadays. Here are few things your Restaurants should do in order to attract Genz and Millennials.

#restaurant #GenZ #Millennials

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How Technology can help Restaurants To Serve Millennial & Gen Z Better
Jane Aglo

Jane Aglo

1575356846

How Technology can help Restaurants To Serve Millennial & Gen Z Better

Gen Z and Millennials are the powersource to Restaurants nowadays. Here are few things your Restaurants should do in order to attract Genz and Millennials.

#restaurant #GenZ #Millennials

Dylan  Iqbal

Dylan Iqbal

1630996646

A Look at an ES2022 Feature: Class Static Initialization Blocks

ECMAScript class static initialization blocks

Class static blocks provide a mechanism to perform additional static initialization during class definition evaluation.

This is not intended as a replacement for public fields, as they provide useful information for static analysis tools and are a valid target for decorators. Rather, this is intended to augment existing use cases and enable new use cases not currently handled by that proposal.

Status

Stage: 4
Champion: Ron Buckton (@rbuckton)

For detailed status of this proposal see TODO, below.

Authors

  • Ron Buckton (@rbuckton)

Motivations

The current proposals for static fields and static private fields provide a mechanism to perform per-field initialization of the static-side of a class during ClassDefinitionEvaluation, however there are some cases that cannot be covered easily. For example, if you need to evaluate statements during initialization (such as try..catch), or set two fields from a single value, you have to perform that logic outside of the class definition.

// without static blocks:
class C {
  static x = ...;
  static y;
  static z;
}

try {
  const obj = doSomethingWith(C.x);
  C.y = obj.y
  C.z = obj.z;
}
catch {
  C.y = ...;
  C.z = ...;
}

// with static blocks:
class C {
  static x = ...;
  static y;
  static z;
  static {
    try {
      const obj = doSomethingWith(this.x);
      this.y = obj.y;
      this.z = obj.z;
    }
    catch {
      this.y = ...;
      this.z = ...;
    }
  }
}

In addition, there are cases where information sharing needs to occur between a class with an instance private field and another class or function declared in the same scope.

Static blocks provide an opportunity to evaluate statements in the context of the current class declaration, with privileged access to private state (be they instance-private or static-private):

let getX;

export class C {
  #x
  constructor(x) {
    this.#x = { data: x };
  }

  static {
    // getX has privileged access to #x
    getX = (obj) => obj.#x;
  }
}

export function readXData(obj) {
  return getX(obj).data;
}

Relation to "Private Declarations"

The Private Declarations proposal also intends to address the issue of privileged access between two classes, by lifting the private name out of the class declaration and into the enclosing scope. While there is some overlap in that respect, private declarations do not solve the issue of multi-step static initialization without potentially exposing a private name to the outer scope purely for initialization purposes:

// with private declarations
private #z; // exposed purely for post-declaration initialization
class C {
  static y;
  static outer #z;
}
const obj = ...;
C.y = obj.y;
C.#z = obj.z;

// with static block
class C {
  static y;
  static #z; // not exposed outside of class
  static {
    const obj = ...;
    this.y = obj.y;
    this.#z = obj.z;
  }
}

In addition, Private Declarations expose a private name that potentially allows both read and write access to shared private state when read-only access might be desireable. To work around this with private declarations requires additional complexity (though there is a similar cost for static{} as well):

// with private declarations
private #zRead;
class C {
  #z = ...; // only writable inside of the class
  get #zRead() { return this.#z; } // wrapper needed to ensure read-only access
}

// with static
let zRead;
class C {
  #z = ...; // only writable inside of the class
  static { zRead = obj => obj.#z; } // callback needed to ensure read-only access
}

In the long run, however, there is nothing that prevents these two proposals from working side-by-side:

private #shared;
class C {
  static outer #shared;
  static #local;
  static {
    const obj = ...;
    this.#shared = obj.shared;
    this.#local = obj.local;
  }
}
class D {
  method() {
    C.#shared; // ok
    C.#local; // no access
  }
}

Prior Art

Syntax

class C {
  static {
    // statements
  }
}

Semantics

  • A static {} initialization block creates a new lexical scope (e.g. var, function, and block-scoped declarations are local to the static {} initialization block. This lexical scope is nested within the lexical scope of the class body (granting privileged access to instance private state for the class).
  • A class may have any number of static {} initialization blocks in its class body.
  • static {} initialization blocks are evaluated in document order interleaved with static field initializers.
  • A static {} initialization block may not have decorators (instead you would decorate the class itself).
  • When evaluated, a static {} initialization block's this receiver is the constructor object of the class (as with static field initializers).
  • It is a Syntax Error to reference arguments from within a static {} initialization block.
  • It is a Syntax Error to include a SuperCall (i.e., super()) from within a static {} initialization block.
  • A static {} initialization block may contain SuperProperty references as a means to access or invoke static members on a base class that may have been overridden by the derived class containing the static {} initialization block.
  • A static {} initialization block should be represented as an independent stack frame in debuggers and exception traces.

Examples

// "friend" access (same module)
let A, B;
{
  let friendA;

  A = class A {
    #x;

    static {
        friendA = {
          getX(obj) { return obj.#x },
          setX(obj, value) { obj.#x = value }
        };
    }
  };

  B = class B {
    constructor(a) {
      const x = friendA.getX(a); // ok
      friendA.setX(a, x); // ok
    }
  };
}

References

TODO

The following is a high-level list of tasks to progress through each stage of the TC39 proposal process:

Stage 1 Entrance Criteria

  • Identified a "champion" who will advance the addition.
  • Prose outlining the problem or need and the general shape of a solution.
  • Illustrative examples of usage.
  • High-level API.

Stage 2 Entrance Criteria

Stage 3 Entrance Criteria

Stage 4 Entrance Criteria

For up-to-date information on Stage 4 criteria, check: #48

  • Test262 acceptance tests have been written for mainline usage scenarios and merged.
  • Two compatible implementations which pass the acceptance tests:
  • A pull request has been sent to tc39/ecma262 with the integrated spec text.
  • The ECMAScript editor has signed off on the pull request.

Download Details:
Author: tc39
The Demo/Documentation: View The Demo/Documentation
Download Link: Download The Source Code
Official Website: https://github.com/tc39/proposal-class-static-block 
License: BSD-3
#javascript #es2022 #ecmascript 

Top five technologies among young entrepreneurs

With transformational changes seen in the business and technology front, Entrepreneurs’ view towards technologies is changing. Here are the top technologies that young entrepreneurs can embed to increase their business performance.

#top five technologies among young entrepreneurs #upcoming and established technologies #best technologies for entrepreneurs #selection of better technologies #top five technologies #business and technology

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Lokesh Kumar

1603438098

Top 10 Trending Technologies Must Learn in 2021 | igmGuru

Technology has taken a place of more productiveness and give the best to the world. In the current situation, everything is done through the technical process, you don’t have to bother about doing task, everything will be done automatically.This is an article which has some important technologies which are new in the market are explained according to the career preferences. So let’s have a look into the top trending technologies followed in 2021 and its impression in the coming future in the world.

  1. Data Science
    First in the list of newest technologies is surprisingly Data Science. Data Science is the automation that helps to be reasonable for complicated data. The data is produces in a very large amount every day by several companies which comprise sales data, customer profile information, server data, business data, and financial structures. Almost all of the data which is in the form of big data is very indeterminate. The character of a data scientist is to convert the indeterminate datasets into determinate datasets. Then these structured data will examine to recognize trends and patterns. These trends and patterns are beneficial to understand the company’s business performance, customer retention, and how they can be enhanced.

  2. DevOps
    Next one is DevOps, This technology is a mixture of two different things and they are development (Dev) and operations (Ops). This process and technology provide value to their customers in a continuous manner. This technology plays an important role in different aspects and they can be- IT operations, development, security, quality, and engineering to synchronize and cooperate to develop the best and more definitive products. By embracing a culture of DevOps with creative tools and techniques, because through that company will gain the capacity to preferable comeback to consumer requirement, expand the confidence in the request they construct, and accomplish business goals faster. This makes DevOps come into the top 10 trending technologies.

  3. Machine learning
    Next one is Machine learning which is constantly established in all the categories of companies or industries, generating a high command for skilled professionals. The machine learning retailing business is looking forward to enlarging to $8.81 billion by 2022. Machine learning practices is basically use for data mining, data analytics, and pattern recognition. In today’s scenario, Machine learning has its own reputed place in the industry. This makes machine learning come into the top 10 trending technologies. Get the best machine learning course and make yourself future-ready.

To want to know more click on Top 10 Trending Technologies in 2021

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