Calculating year from total minutes while accounting for leap year

I'm putting together an ICS file generator using jquery. After inputting the Date and time zone I figured it would be easiest to calculate out total minutes then make the timezone conversion to Z-time / UTC-0 / GMT and reconvert the total time into each appropriate time unit (year, month, date, hour and minute).

I'm putting together an ICS file generator using jquery. After inputting the Date and time zone I figured it would be easiest to calculate out total minutes then make the timezone conversion to Z-time / UTC-0 / GMT and reconvert the total time into each appropriate time unit (year, month, date, hour and minute).

My question concerns the logic of my function: is this the most effective way to do this calculation, 2018 checks? Keep in mind, every leap year (current year is divisible by 4) has 527040 minutes and the common year (not divisible by 4) has 525600.

var timeTot = 1061911800; // for debug
var uyear = 1; // DODGE DIVIDE BY ZERO ERROR

while (timeTot >= 525600 || timeTot >= 527040) {
if (uyear % 4 != 0) { // is common year?
timeTot -= 525600;
uyear++;
} else if (uyear % 4 == 0) { // is leap year?
timeTot -= 527040;
uyear++;
} else {
//infinite loop!
timeTot = 0;
}
}
uyear -= 1; // UNDODGE DIVIDE BY ZERO
// uyear is 2018 ( 1/1/[email protected]:00 UTC-6 )


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How to use getContext() in jQuery

I'm trying to use&nbsp;getContext('2d');&nbsp;in jQuery. I have seen&nbsp;<a href="https://stackoverflow.com/questions/2925130/jquery-equivalent-of-getting-the-context-of-a-canvas" target="_blank">this question</a>, but it doesn't seem to work. It could possibly be from updates, since the question was asked near 9 years ago. I am adding&nbsp;&lt;script src='<a href="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js'&gt;&lt;/script&gt;" target="_blank">https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js'&gt;&lt;/script&gt;</a>&nbsp;in the head, but using a different&nbsp;&lt;script&gt;&nbsp;tag. Here is all my code:

I'm trying to use getContext('2d'); in jQuery. I have seen this question, but it doesn't seem to work. It could possibly be from updates, since the question was asked near 9 years ago. I am adding <script src='https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js'></script> in the head, but using a different <script> tag. Here is all my code:

var c = $('.canvas');
var ctx = $(c)[0].getContext('2d');

window.onload = function() {
$c.width(500);
$c.height(250);
$c.css({'background-color': '#e2e2e2', 'margin': '0 auto', 'display': 'block'});
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<canvas id='canvas'>You're browser does not support the requirements to play this game. Update your browser or use a different browser</canvas>


I'm using Google and checking the console through F12, and it says -

Uncaught TypeError: Cannot read property 'getContext' of undefined

Any help is appreciated! Thanks!

Difference between jQuery and AngularJS

Difference between jQuery and AngularJS

The clash between both of them is tougher. jQuery is a JavaScript library whereas AngularJS is a JS framework. JQuery has been into the existence since 2006 and is helping the developers in manipulating DOM with JS. Whereas, Angular was launched by Google in 2009 which focused on developing some powerful Single Page Apps. AngularJS and jQuery both play a vital role in the modern world of front-end development.

The clash between both of them is tougher. jQuery is a JavaScript library whereas AngularJS is a JS framework. JQuery has been into the existence since 2006 and is helping the developers in manipulating DOM with JS. Whereas, Angular was launched by Google in 2009 which focused on developing some powerful Single Page Apps. AngularJS and jQuery both play a vital role in the modern world of front-end development.

 

jQuery

It is necessary to understand jQuery as well as AngularJS individually. It is one of the most popular JS library. jQuery is a modular set of a cross-browser method for triggering the elements, choosing elements from the DOM, setting input values and much more. In simple terms, we can say that jQuery is a lightweight JS library that guides developers in clarifying the usage of client-side scripting for web apps using JS. Some key features and benefits of jQuery are

  • The content of a webpage can be manipulated easily
  • For creating gorgeous UI, you can use styles
  • AJAX calls can be made easily
  • HTML/DOM manipulation
  • Event Handling
  • Cross-browser compatibility
  • Lightweight

 

AngularJS

 

AngularJS is a robust JavaScript framework which was introduced by the tech giant Google in 2009. It brought revolutionary changes in the web development field, and the developer community warmly welcomed it. AngularJS app development has become a popular framework due to its fast-performing features. It also helps to create an interactive Single Page App (SPA) which offers terrific user experience.

 

Features of AngularJS:

 

•   Data Binding:

Data Binding provides following benefits to AngularJS Framework:

o   No need to write the code which synchronizes the view with the model and vice versa.

o   Simplified Programming model

o   A decrease in the number of Boilerplate coding.

 

•   Less Coding:

With the help of a conclusive User Interface, 2-way Data Binding & POJO Models, it enables you to form less amount of code in your project with greater capabilities.


•   Two-way Data Binding:

The 2-way Data Binding allows auto-synchronization between Model and View components. Data Binding enables you to stores the information and the data in such a way that it doesn't get repeated. Whereas in two-way Data Binding, if there are any changes made to any data, it will reflect the whole model.

 

•   MVVM Architecture:

AngularJS is furnished with MVVM(Model-View-View-Model) Architecture. The HTML template (of a component) is the view & the typescript part is the view model. Connecting the view to the view model is bindings.

 

•   Unit Testing:

Security is the biggest challenge faced by any company worldwide. The whole documentation is provided by the Unit Testing which will always be updated, including the instructions related to your motive of the code & its functional behaviour. The dominant benefit what Unit testing provide is that it forces you to use your code & encounter the defects in your design.

 

When to prefer jQuery ?

jQuery will be the first option if you are looking for a lightweight JS library along with DOM manipulation. jQuery also allows you to design and customize DOM along with JS. Even you can create a great website from a scratch if you adopt jQuery with vanilla JavaScript. However, you have to make sure that you use proper plugins for avoiding more bugs and issues. jQuery has some in-built features like event handling, AJAX support, and animation for making web development easier. You have to be very careful while adding the functionalities of jQuery plugin in Angular as the data binding within the apps can break.

 

When to prefer Angular?

Angular is the best option to go with when you are working on creating a web app. Angular processes on HTML code and JSON data which is helpful in creating robust and immersive apps. Angular is helpful in maintaining your web projects easily. The designing and customization in an Angular application can be performed quickly and stunningly with its two-way Data Binding and dependency injection.