Top 5 Tips for Optimize Your JavaScript Algorithms

Logic accounts as the most significant factor affecting the speed and performance of any given algorithm. On the other hand, simplified syntax comes in as an important feature in reducing syntax noise and clarifying the intent of code, and generally helps us reduce the amount of code we have to write. Our JavaScript algorithms could be made more performant by using the following tips (as a few possible tools in a much bigger bag).

(1) Tilde (~) operator in search functions.

The tilde operator is a useful bitwise operator that flips all bits in its operand. Any digit that is a 1 in the expression becomes a 0 in the result whereas any digit that is a 0 in the expression becomes a 1 in the result.

On its own, indexOf() returns the index number of a String object passed in or otherwise returns -1 when the query is not found. Using ~ on -1 converts it to 0. The number 0 is a falsy value, meaning that it will evaluate to false when converted to a Boolean. Anything that is not falsy is truthy.

const searchPhrase,str;
if (~searchPhrase.indexOf(str)) {
    // searchPhrase in str
} else {
    // searchPhrase not in str
}

Note: As of ES7 released in 2016, JavaScript has Array.prototype.includes() and String.prototype.includes(). These return a boolean value (note that the alternative ~searchPhrase.indexOf(str) returns either 0 or a truthy value). If your target platform(s) support it, you should prefer these for testing for the existence of a value in a string or an array.

let foo = "hello world";
foo.includes("w"); // true
foo.includes("z"); // false

(2) Immediately invoked function expressions (IIFEs).

An IIFE is an anonymous function that is invoked immediately after its definition. There are various ways of writing an IIFE:

(function(a){/*code*/})(arg); 
(function(a){/*code*/}(arg));

The brackets enclosing the anonymous function can be alternatively replaced by:

• The operators +,-,!,~
• The void keyword
• The expression true &&
• 0,

Any of the above symbols and expressions just before the anonymous function works while defining an IIFE, eg:

+function(){/*code*/}();/*or*/void function(){/*code*/}();/*or*/true && function(){/*code*/}();/*or*/0, function(){/*code*/}();

While using ES6 arrow function notation, an IIFE can be written as:

(() => { /* … */ })();/*In this case, the invoking parantheses are only allowed on the outside.*/

You can pass variables to an IIFE scope via the invoking parentheses:

(function(a, b) { /* … */ })(“valueA”, “valueB”);

You can substitute function definition and function calls with the IIFE construct for functions that you want invoked once/immediately within your code.

(3) Bitwise XOR in comparison operations.

In Javascript code, we don’t get to see bitwise operators in use that much. Try solving the Single Number algorithm on Leetcode in practice first. Did you give it a try? Given a non-empty array of integers, the algorithm requires us to return the number that doesn’t appear twice in the array. The algorithm exhibits unique characteristics allowing for the perfect use of the bitwise XOR operator

Given an array [a,a,b] where a and b are integers, we can make use of bitwise bit comparison of the number elements in the nums array, basing our logic on:

• a⊕a⊕b

Explanation — If we take the XOR (⊕) of two same bits, it will return 0.

• a⊕a=0

If we take the XOR of zero and some bit, it will return that bit

• a⊕0=a

The expression a⊕a⊕b evaluates to

• a⊕a⊕b=(a⊕a)⊕b=0⊕b=b

In JS, a bitwise XOR comparison of two integers can be achieved using the (^) logical operator.

We can thus solve the Single Number algorithm by:

 

(4) Ternary Condition operators.

Ternary condition operators come in handy as one-liners to substitute if/else or nested if/else block statements. The following if/else block statement:

var str = ‘abc’;
if(‘string’ == typeof str) {
    return ‘string’;
} else {
    return ‘Not a string’;
}

Can be written as:

return typeof(str) == 'string' ? 'string' : 'not a string';

The following is the equivalent of a series of nested if/else block statements. Can you try to figure out it’s alternative nested if/else implementation?

let num;let numString = (
  num == 1 ? 'one' : (
    num == 2 ? 'two' : (
      num == 3 ? 'three' : (
        num == 4 ? 'four' : (
          num == 5 ? 'five' : (
            num == 6 ? 'six' : (
              num == 7 ? 'seven' : (
                num == 8 ? 'eight' : (
                  num == 9 ? 'nine' :
                    'zero'
))))))));

As you might have noticed in the above example, nested ternary condition operators can get pretty ugly, and fast. I’d therefore only advise usage for simple if/else statements. If you have to overdo it, make sure it doesn’t exceed an if/else if/else block.

(5) Making use of return values given by specific inbuilt function.

Consider the Array.prototype.splice() function that’s used to modify arrays. The splice() function takes three arguments, the start_index, delete_count, and element_to_add, and modifies the array it’s applied to by deleting delete_count elements starting at start_index. The element_to_add argument is optional, but if specified, inserts the element_to_add to the array, either replacing the elements deleted, or inserting a new element to the array if the delete_count is 0.

The splice() operation gives the deleted elements as a return value and at the same time updates the array to reflect the new changes. We can make use of the return value to store elements that have been deleted from our array, if, in case, we need to work with them later.

Example:

var array = [1,2,3];var removedElements = array.splice(1,1); 
/*Deletes one element starting at index 1 i.e 2, then inserts “deleted” in its place. */console.log(removedElements,’,’, array); 
/*logs 2, [1,”deleted”,3]*/

#javascript #algorithms

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Top 5 Mobile App Development Companies in New York

New York is the best potential business hub for the technology and IT industry. Thousands of companies are established in New York for the mobile app development or technology industry. So, here quite a confusion is that how to choose the right company for your business amongst all the companies. No need to worry about it, We have found the most reliable and trustworthy mobile app development companies that are the top-tiers in New York. Before we share the companies list you need to know the benefits of mobile app development for your business.

Key Benefits of Mobile App Development:

· Improves Efficiency

· Offers High Scalability

· Secures Your App Data

· Integrates With Existing Software

· Easy to Maintain

· Improves Customer Relationship

· Facilitates New Client Data Retrieval

· Provides Real-time Project Access

Are you looking for top mobile app development companies in New York that help to create a custom mobile app as per your business requirements? Please go through these Top 5 mobile app development companies that provide exceptional development and design services for your business.

Top Mobile App Development Companies in New York:

1. AppCluesInfotech

AppClues Infotech is one of the leading mobile app development company based in New York that builds high-quality mobile apps. Being a versatile mobile app development company, they provide services on various platforms like Android, iOS, Cross-platform, Windows, etc. They are aware of the latest technologies and features of industry. They utilize them to create a user-engaging mobile app. They have the best team of designers and developers who are delivered a mobile app with high-quality and performance.

Founded In: 2014

Employees: 50 to 200 Members

Location: USA

Website: https://www.appcluesinfotech.com/

2. Data EximIT

Data EximIT is one of the leading mobile app development company in New York that provides top-notch and elegant mobile app development services with the latest market trends and functionalities at a competitive price. They have highly experienced mobile app designers and developers team who have the best strength of developing all types of a mobile app. They deliver a feature-rich mobile app for their clients that give the best business ROI.

Founded In: 2004

Employees: 50 to 150 Members

Location: USA & India

Website: https://www.dataeximit.com/

3. WebClues Infotech

WebClues Infotech is the most reliable & superior company that builds custom mobile apps to do things differently. They are the best mobile app development company in New York, USA and as well as globally with high proficiency. They have a highly experienced app developers team that has the best strength of work on multiple platforms like android, Cross-platform, and iOS.

They have successfully delivered 950+ mobile app projects effectively and on-time. Build your Robust, Secure, Scalable & High-performance mobile app with WebClues Infotech with creative & dynamic designs at an affordable price.

Founded In: 2014

Employees: 50 to 250 Members

Location: USA, INDIA, UAE, UK & CANADA

Website: https://www.webcluesinfotech.com/

4. AppClues Studio

AppClues Studio is a leading mobile app development company in New York, USA. The company is versatile in developing custom mobile app development solutions to its customers across the globe. With an experience of 8+ years in mobile app development, Utility is hyper-focused on Return on Investment (ROI) and building good relationships with partner companies. The company is worked with a start-up to large enterprises.

Founded In: 2014

Employees: 50 to 150 Members

Location: USA & UK

Website: https://appcluesstudio.com/

5. WebClues Global

WebClues Global is a prominent mobile application development company in New York, USA. They are one of the top-tier mobile app developers who deliver high-end Android mobile app solutions to their clients. The company operated with 100+ qualified developers who working in different domains to give the best solution for their development. WebClues Global offers various services including web and mobile design & development, E-Commerce Development, Ui/Ux Development.

Founded In: 2014

Employees: 50 to 150 Members

Location: USA, INDIA, UAE, UK & CANADA

Website: https://www.webcluesglobal.com/

#top 5 mobile app development companies in new york #top 5 mobile app development companies in usa #top mobile app development companies in new york #top mobile app development companies in usa #top 5 mobile app development companies

Top 5 Tips for Optimize Your JavaScript Algorithms

Logic accounts as the most significant factor affecting the speed and performance of any given algorithm. On the other hand, simplified syntax comes in as an important feature in reducing syntax noise and clarifying the intent of code, and generally helps us reduce the amount of code we have to write. Our JavaScript algorithms could be made more performant by using the following tips (as a few possible tools in a much bigger bag).

(1) Tilde (~) operator in search functions.

The tilde operator is a useful bitwise operator that flips all bits in its operand. Any digit that is a 1 in the expression becomes a 0 in the result whereas any digit that is a 0 in the expression becomes a 1 in the result.

On its own, indexOf() returns the index number of a String object passed in or otherwise returns -1 when the query is not found. Using ~ on -1 converts it to 0. The number 0 is a falsy value, meaning that it will evaluate to false when converted to a Boolean. Anything that is not falsy is truthy.

const searchPhrase,str;
if (~searchPhrase.indexOf(str)) {
    // searchPhrase in str
} else {
    // searchPhrase not in str
}

Note: As of ES7 released in 2016, JavaScript has Array.prototype.includes() and String.prototype.includes(). These return a boolean value (note that the alternative ~searchPhrase.indexOf(str) returns either 0 or a truthy value). If your target platform(s) support it, you should prefer these for testing for the existence of a value in a string or an array.

let foo = "hello world";
foo.includes("w"); // true
foo.includes("z"); // false

(2) Immediately invoked function expressions (IIFEs).

An IIFE is an anonymous function that is invoked immediately after its definition. There are various ways of writing an IIFE:

(function(a){/*code*/})(arg); 
(function(a){/*code*/}(arg));

The brackets enclosing the anonymous function can be alternatively replaced by:

• The operators +,-,!,~
• The void keyword
• The expression true &&
• 0,

Any of the above symbols and expressions just before the anonymous function works while defining an IIFE, eg:

+function(){/*code*/}();/*or*/void function(){/*code*/}();/*or*/true && function(){/*code*/}();/*or*/0, function(){/*code*/}();

While using ES6 arrow function notation, an IIFE can be written as:

(() => { /* … */ })();/*In this case, the invoking parantheses are only allowed on the outside.*/

You can pass variables to an IIFE scope via the invoking parentheses:

(function(a, b) { /* … */ })(“valueA”, “valueB”);

You can substitute function definition and function calls with the IIFE construct for functions that you want invoked once/immediately within your code.

(3) Bitwise XOR in comparison operations.

In Javascript code, we don’t get to see bitwise operators in use that much. Try solving the Single Number algorithm on Leetcode in practice first. Did you give it a try? Given a non-empty array of integers, the algorithm requires us to return the number that doesn’t appear twice in the array. The algorithm exhibits unique characteristics allowing for the perfect use of the bitwise XOR operator

Given an array [a,a,b] where a and b are integers, we can make use of bitwise bit comparison of the number elements in the nums array, basing our logic on:

• a⊕a⊕b

Explanation — If we take the XOR (⊕) of two same bits, it will return 0.

• a⊕a=0

If we take the XOR of zero and some bit, it will return that bit

• a⊕0=a

The expression a⊕a⊕b evaluates to

• a⊕a⊕b=(a⊕a)⊕b=0⊕b=b

In JS, a bitwise XOR comparison of two integers can be achieved using the (^) logical operator.

We can thus solve the Single Number algorithm by:

 

(4) Ternary Condition operators.

Ternary condition operators come in handy as one-liners to substitute if/else or nested if/else block statements. The following if/else block statement:

var str = ‘abc’;
if(‘string’ == typeof str) {
    return ‘string’;
} else {
    return ‘Not a string’;
}

Can be written as:

return typeof(str) == 'string' ? 'string' : 'not a string';

The following is the equivalent of a series of nested if/else block statements. Can you try to figure out it’s alternative nested if/else implementation?

let num;let numString = (
  num == 1 ? 'one' : (
    num == 2 ? 'two' : (
      num == 3 ? 'three' : (
        num == 4 ? 'four' : (
          num == 5 ? 'five' : (
            num == 6 ? 'six' : (
              num == 7 ? 'seven' : (
                num == 8 ? 'eight' : (
                  num == 9 ? 'nine' :
                    'zero'
))))))));

As you might have noticed in the above example, nested ternary condition operators can get pretty ugly, and fast. I’d therefore only advise usage for simple if/else statements. If you have to overdo it, make sure it doesn’t exceed an if/else if/else block.

(5) Making use of return values given by specific inbuilt function.

Consider the Array.prototype.splice() function that’s used to modify arrays. The splice() function takes three arguments, the start_index, delete_count, and element_to_add, and modifies the array it’s applied to by deleting delete_count elements starting at start_index. The element_to_add argument is optional, but if specified, inserts the element_to_add to the array, either replacing the elements deleted, or inserting a new element to the array if the delete_count is 0.

The splice() operation gives the deleted elements as a return value and at the same time updates the array to reflect the new changes. We can make use of the return value to store elements that have been deleted from our array, if, in case, we need to work with them later.

Example:

var array = [1,2,3];var removedElements = array.splice(1,1); 
/*Deletes one element starting at index 1 i.e 2, then inserts “deleted” in its place. */console.log(removedElements,’,’, array); 
/*logs 2, [1,”deleted”,3]*/

#javascript #algorithms

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

You may also read more blogs mentioned below

How to Become a Salesforce Developer

Python VS R Programming

The Scope of Hadoop and Big Data in 2021

#top trending technologies #top 10 trending technologies #top 10 trending technologies in 2021 #top trending technologies in 2021 #top 5 trending technologies in 2021 #top 5 trending technologies

The essential JavaScript concepts that you should understand

As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.

#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips

Hire Dedicated JavaScript Developers -Hire JavaScript Developers

It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.

Does your business need an interactive website or app?

Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.

The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.

Get your business app with JavaScript

For more inquiry click here https://bit.ly/31eZyDZ

Book Free Interview: https://bit.ly/3dDShFg

#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers