Mehul Mohan

In my opinion, AngularJS is easier to get started with as compared to Angular 2/4. This is primarily because in AngularJS, you’ve to just include a script and you can get started.

However for Angular 2/4, if you’re not going to use Angular CLI, then it’ll take you some time to setup your development environment. This might be overwhelming for people who never setup environments including things like transpilers, webpack, etc.

But once your dev environment is setup correctly, it just boils down to how much you practice and understand stuff. So in a nutshell, if you’re comfortable, or atleast a bit familiar with TypeScript, ES6, etc. I think Angular 2/4 would be a great choice over AngularJS because apparently it is the future of Angular.

Nonetheless, here’s how you can get started, at least with the basics:

AngularJS - AngularJS Tutorials - YouTube

Angular 2/4 - Angular 4 Tutorials - YouTube

Good luck!

Electron requires you to know about NodeJS (and JavaScript, obviously). But you do not need to be master to begin. I think learning while building things is the best way to actually retain what you’re doing.

Here’s a web series to get you started with electron framework: Electron Tutorials - YouTube

I’m working on a tutorial series on YouTube regarding electron framework. Electron is a very simple way to build cross platform apps if you’re comfortable with JavaScript.

Try it out: Electron Tutorials - YouTube

If you’d like to learn about JavaScript, I’ll recommend mozilla developer network. JavaScript (go with the complete beginner section)

Good luck!

How do you start learning anything? By creating something with it! If you’re good, or at least know the basics of JavaScript, you’ll be up and running your first electron app in no time.

Here’s a playlist to get you started: Electron Tutorials - YouTube

If you’d like to learn about JavaScript, I’ll recommend mozilla developer network. JavaScript (go with the complete beginner section)

Good luck!

Hack? I’ve got one!

The best way to ask for apology is to apologize every 30 minutes! Isn’t that cool? But who is here to send a message every 30 minutes? Now you’re understanding the hack. ;)

So here’s this app: Scheduler For WhatsApp - Android Apps on Google Play. You have to configure it for the first time with your laptop/computer (which is a little pain), but once done, you can configure it to send, or rather schedule messages on whatsapp to any of your contact/group on your specified time.

Like wishing somebody on their birthday exact at 12 when you’re busy watching movie on your phone! Yeah, it works that way!

For the bad guys/girls, it comes with a SPAM mode to beat the hell out of your enemy by flooding the other person with messages! Handle with care!

Spoiler: I’m the developer.

I created my first app as a game ‘Bantumi 3310’ around a couple of months back, which was earlier available on older models like Nokia 3310 and some more models.

Rules are simple and mentioned in the help section of the game. You might even just go ahead and play to understand what is going on.

Here's the link: Bantumi 3310 - Android Apps on Google Play

Update: I think Scheduler For WhatsApp - Android Apps on Google Play is a “cooler” thing than this :D

I’m a class 12th student so I don’t get a lot of time for my programming activities, but recently, I created a media server for raspberry pi which allows you to play videos from YouTube and from your phone directly on your TV!

This setup works on your home WiFi (LAN) i.e. your phone and raspberry must be connected to same WiFi network in your home.

You just need to have a raspberry (any model). Here are the steps to setup raspberry pi for this media server:

• Connect your raspberry to your TV with HDMI cable.
• Follow the below instructions using a connected keyboard to raspberry or with SSH.
• Clone this repository mehulmpt/WiPi on your raspberry by writing:

git clone https://github.com/mehulmpt/WiPi

• Now open the folder WiPi just created using:

cd WiPi

• Make the initial boot file executable by writing:

chmod +755 boot.sh

• Run the boot file:

./boot.sh

• Now let it complete. Once it’s done, it’ll show you “Starting WiPi. Enjoy!”.

Setting Android

• Make sure your raspberry is connected to TV. If everything went smooth, you should start seeing notifications on your TV screen something like this:

• Okay, 50% done. Now download this app: WiPi - Android Apps on Google Play
• Launch the app.
• Click on “Connect to WiPi”
• It’ll ask for an IP address. Enter the IP displayed on screen earlier.
• Hit OK.
• Congrats! You’ve successfully configured Pi with your phone.
• Now you can stream youtube videos/media from your phone via “Share” on Android. Example: Go to YouTube -> Video -> Click Share -> Select WiPi.
• For streaming media of your gallery (like a movie or something), go to Gallery -> Select video -> Share -> WiPi.
• Controls embedded in android app.
• Sit back and enjoy!

Here’s my take:

If D detects a program P as virus if P tries to execute malicious system commands, then D would not be able to detect CV as a virus because that program makes other exes infected (assuming silently) and thus would only detect those infected exes as virus.

However, if D detects a program P as virus by scanning its code and what possible executable actions can be taken by its code, then D would surely detect CV as a virus because there has to be some sort of virus code in CV as it infects and puts into other exe files.

Here obviously I’m assuming that there is no involvement of internet to download source code, etc. otherwise the second scenario can be defeated as well.

I’ve earlier answered this question: Mehul Mohan's answer to Can you download all Quora answers from one person? and I think this is what you might need.

Though I didn’t try my script on a profile with this many answers but this should probably work well. Just start the script and leave it for few minutes (the exact time depends how fast your PC processes instructions) and you’d be presented with a new webpage with all the answers. You can then save it in word or wherever you like.

JavaScript is THE frontend scripting language. C++ is something which runs close to your machine hardware. You can program softwares, games, even GUI in C++.

You can, in no way, integrate JavaScript and C++ DIRECTLY. C++ does not run on browsers. You can however use C++ to create server, i.e. your backend language could be C++.

C++ is fast but is like a double barrel gun with one barrel pointing at you. Doing it wrong could blow you up. So make sure you know what you’re doing (or rather go with some already coded servers in C++)

Google itself uses C++ at server side for some speed critical operations.

It really depends how much you’re giving in. I’m a school-going guy so could eventually take out only 2–3 hours a day for programming and stuff. But what’s important is that you move fast. Don’t just stick on one thing and deeply study it, it won’t give you any benefit. Don’t understand something? Google it, ask on stackoverflow, ask somebody professional.

Also, don’t jump into any sort of frameworks at all before you are good with the native SDK implementation. There are some attractive game engines which you might think would make your development process easier, but no. They’d make it easier for the one who already knows a lot about android in the first place.

I’ve developed around 4–5 apps but mostly for my personal use (like youtube video downloader, facebook video downloader, etc.) I’ve created another app called Bantumi 3310 (this is that game on older nokia phones). I tried to keep it mostly same. It took me about 4–5 days or you can say around 10 hours to do this (including graphic, sound, editing, etc.)

Good luck!

It really depends on the type of collision. Supermassive object would have a supermassive momentum with it (p = mv). Lets assume a perfectly inelastic collision (which is likely to happen).

So, assuming that you are initially at rest and supermassive body hits you slowly (like 2–3 m/s), and your mass is `m` and mass of supermassive body is `M`, then:

Mu = (M+m)v where u and v would be final velocities. Well, since you are well below the mass of supermassive object, we can safely assume v ~ u. So, you’d just start moving with almost same velocity as of the supermassive object.

However, if you want to be a little bit more creative, think of a perfectly elastic collision. For this, velocity of separation (finally) = velocity of approach (initially). So you can think that you’ll be ripped apart by that much change of momentum.

Note: I’ve ignored gravity and all other real things which would actually happen in such an event. This is a complete hypothetical answer. So don’t jump from window :)

Imagine a human being, lets call it X. How X looks like and structured (height, weight, etc.) is decided by HTML/CSS.

Now lets say, X sees a rod, but doesn’t know it’s hot. X touches the rod, and boom!

The JavaScript (receptors) of X immediately sends a signal to PHP (brain) of X regarding what happened. PHP then responds back to frontend (the JavaScript) and tells JavaScript to remove hand from the rod.

PHP also saves this occurrence in MySQL (your storage area) so in future, X does not touch hot iron rod.

In short:

• HTML/CSS - How website looks
• JavaScript - How website interacts
• PHP - How backend interacts (Can interact with frontend (user) with JavaScript calls, etc.)
• MySQL - Place to store data like CC details, login info, etc.

That’s the most ridiculously simplest connection I was able to make. In real world, obviously JavaScript and PHP run on different machines (one on user end, other on server end), so, this analogy fails a bit. Sorry geeks!

There are a lot of ways to do this thing. You can scrape the information from profile page, you could even check how their API is loading their answered questions when you scroll down on their profile page. But the simplest one I can think about goes like this:

• Go to the profile page of the user, lets say its mine: Mehul Mohan
• Assuming that you’re using a modern browser, right click on white screen area -> Inspect Element (or Inspector, or something like that) -> Console tab.
• In the JavaScript console, write this line:

var interval = setInterval(function() {
 window.scrollTo(0,document.body.scrollHeight);
}, 200);

• By now, you must have noticed that your page continuously goes down whenever answers are loaded.
• Let this happen till the last answer (when no more content loads).
• When all answers are loaded, run this code in console:
  clearInterval(interval);
• Okay. Part 1 done.

Now though all answers are loaded, but still answers are partial. You’ll notice that there is a more link which would then lead you to full answer. Pretty annoying if done manually, but hey! ;)

• Inside console, write:

[...document.querySelectorAll('.more_link')].map( e => e.click() )

• Sit back with your coffee (or coke) for a few seconds.

Hurray! We’re almost done. Now, in console, write:

var questions = [];
var answers = [];
var i = 0;
[...document.querySelectorAll('div.pagedlist_item')].map( e => {
answers[i] = e.querySelector('div.ExpandedAnswer').innerText;
questions[i++] = e.querySelector('span.question_text').innerText;
 
});
// You have access to questions and answers now.
// questions[0] → answers[0] and so on..
var bigStr = "";
for(i=0;i<answers.length;i++) {
bigStr += "<h2>"+questions[i]+"</h2>"+"<p>"+answers[i]+"</p><br><br>";
}
var w = window.open('', '', 'width=800,height=800,resizeable,scrollbars'); w.document.write(bigStr);

Wow! Here we go! :D

Usually, you don’t have to. Google would do the job for you. Google often shows recommended extensions or similar extensions when a user installs a particular extension. Once your extension is launched, you just need to get a few installations and do stuff like setting up description, keywords, etc.

If you really want to have quick results, you can create a video demonstrating how to use your extension and why use it. Publish it on YouTube. Promote it via social media or YouTube video ads, but I think investing money in your extension won’t be a great idea unless your extension offers some in-extension purchases.

Good luck!

You can learn server side and frontend scripting simultaneously. For server side, stick to a single language like PHP as you’ll find it relatively easy to interact with frontend forms.

Don’t learn jQuery first because you’ll start avoiding native JS as jQuery makes a lot of things much easy. But you should still know how to code almost everything in native JS as well.

Good luck.

Yes, JavaScript is a really bad language.

Yes, all those people at Google who developed Chromium V8 JS engine because they’re stupid.
Yes, its lame that JavaScript allows you to develop awesome games on browser.
Yes, JavaScript is bad because it allows you to use WebGL for 3D games and animation.
Yes, developers are crazy because they’re supporting it from 20 years (and still do).
Yes, it is JavaScript’s fault that people code bad JS. JavaScript should probably be an AI language which should probably code itself automatically.

Yes, JavaScript should be decimated.

Exporting ionic app quite an easy task. Watch these 2 videos:

When you equate 2 things, that literally means that you can make use of either of the things at some place. For instance,

2 KG = 2000 Grams

Now, wherever you write 2 kg, you could actually replace it by 2000 gm. A dimensionally incorrect equation is surely incorrect because you are not theoretically equating same quantities. You cannot make use of "time" instead of "mass" or "length", ever.

Well, all of the people out here referred to Java as the language and tutorials related to it. Java is the native development language of Android. However, if you know web a little bit, like AngularJS, JavaScript, and HTML, you can right away develop applications involving infinite scrolls, pull to refresh, and all those awesome features. Here is the list Ionic Framework Tutorials.

And yeah, here's the first part of developing your Android (actually, cross platform!) application:

AngularJS is a very neat framework. Its great that you know about JavaScript and HTML, as you might need them very often. I don't think underscore would contribute a lot for AngularJS, but still its good to know about another library.

You can start off with AngularJS using these video tutorials: AngularJS Tutorials. It covers pretty much everything you need to know about AngularJS.

And once you are done with it, you can probably create mobile applications out of it as well! (Using Ionic).

Good luck!

You can probably work with PHP + Simple HTML DOM Parser library for PHP which would make it a cakewalk to parse down HTML and do some data scraping. I recently created an API out of a news website which just showed latest news on their website with no API support. Now its really convenient to get notifications right on your desktop for new news.

Here's Simple HTML DOM Parser: PHP Simple HTML DOM Parser

The documentation is well written and you should find any problem.

Developing applications on Ionic is a cakewalk, if you are doing it simple. You can develop your hello world program and even run it on your real android/iphone device in less than a couple of minutes (if you've set up development environment correctly).

To "rapidly" develop an app on ionic, you MUST know AngularJS basics (or Angular 2, if you are working with Ionic 2). Here are some tutorials to teach you AngularJS: AngularJS Tutorials

Once you are done with that, you can start off from Ionic: Ionic Framework Tutorials

Or if you are really desperate, just follow up with me to create a simple news reader app!

Good luck!

Creating a simple browser isn't very difficult task. You just have to tell the program how to deal with HTTP protocol. But this browser would be extremely simple and would just return the source code of website.

Things would get really messy when you try to develop a custom JavaScript engine, toolbars, GUI, etc. because for that, you'll need a lot of code, and admit it when I say, a LOT OF CODE.

So probably, no "single" programmer would take up creating a browser competitive to Chrome or Firefox, or IE, or whatever.

Ionic is the simplest framework I've ever encountered to make applications for mobile devices. Using angular with ionic is highly recommended, not only because Ionic is built on angular, but because angular is also becoming one of the most used web framework.

AngularJS is really simple and easy to understand if you don't rush it out. You can create an android application in less than half an hour with the help of ionic + angularJS if you know just the basics. You don't need to know Ionic at all! Infact Ionic is a framework of frameworks, so you probably need to learn those sub-frameworks.

Most important of those is Angular. I'd really recommend you to spend some time with AngularJS and then move to Ionic. Here are a bunch of AngularJS tutorials you'd like to have: AngularJS Tutorials

These would help you to gain enough information you need for Ionic (actually, a lot more than enough)

Then you can move to Ionic framework tutorials: Ionic Framework Tutorials

And if you are really desperate to see Ionic in action, here's a simple news reader application:

Good luck!

Myself, I found the Angular 2 documentation a bit confusing for anybody who is really trying to learn Angular 2. However, I've got a bunch of tutorials for you, solely dedicated to Angular 2 + TypeScript + Sublime Text + NPM. These tutorials would help you to kickstart with Angular 2. You might want to check out:

Angular 2 Tutorials

This (Javascript Tutorials) is a collection of around 50+ tutorials, if you want to kickstart with JavaScript. It includes everything you need to learn in JavaScript, from Hello World to the prototypal model on which JavaScript works, to regular expression, to hoisting and all that cool stuff.

I would, however, highly recommend you to not just watch tutorials, but also follow along with them. Ask for any problems you face, and try to implement it in any project you can think of.

After JavaScript, you should probably go for jQuery as it makes whatever you've learned so far, much easier. But always go for JavaScript first, otherwise, you'll miss the basics of everything built on JavaScript.

Good luck!

Put a drop of ink on a piece of paper. Let the paper absorb the drop completely. Now, lets assume that paper is perfectly 2 dimensional (0 thickness, [assumed]).

Now, if you bend the paper sheet right where the ink was dropped, did the ink drop bend? Yes, but only because you are viewing it from an upper dimension. But from 2D world, nothing would be changed.

Similarly in 3 dimensional world, though space would bend and all other things inside it, you'll not realize it unless you view it from a 4 D world.

Note: I've assumed that you just placed the planet in front of rod quietly without wobbling the space-time fabric.

Science is awesome!

'Fast' is an ambiguous term here. Angular 2 is a beast. It is obviously faster in execution and better than 1.x. It supports and brings so many things which Angular 1.x doesn't have. Brings in support for ES6, modules, classes. You can even run it on server!

Angular 2 is not limited to DOM only. It is fast, and it is the future! But you might consider learning Angular 1.x a bit before hopping into Angular 2?

AngularJS Tutorials

It mostly does. You can enable an experimental flag which would allow you to use more of ES6 things on your chrome. Demonstration:

The good thing about EMCAScript 6 is that it **will be** the next standard of JavaScript in all browsers. So, you wouldn't need those JS compilers like traceur and others at all. For now, yes, you'll need to do the transpiling of the code because not all browsers support all features of ES6.

However, if you just want to learn it yourself and use it after it has been standardised, you can just enable a flag in chrome to unlock almost all proposed ES6 features in your browser.

Checkout how to do this here:

Is Bugatti Veryon replacing Boeing 747?

Obviously, no. But you'll mostly try to use Angular (Veryon) whenever possible, wouldn't you? Angular works on frontend. No matter how good it is, it cannot do a LOT of things which server does, header manipulation, working with databases directly, executing shell commands on server, store uploaded files, and so on..

BUT angular 2 is a beast. It'll run on server as well as on frontend. So expect Angular 2 to be the future of web. It's still in beta, so for now, go ahead with Angular 1.x:

AngularJS Tutorials

"Best for SPA" and "only for SPA" has a difference.

AngularJS can be used in a lot of places, other than SPAs. It is a great javascript framework to create SPA, though. But it comes with a hell load of other things like routing, which allows you to even create multiple page website on the frontend itself!

If you're looking to learn Angular 1.x, I'll suggest you to just go over through the basics because angular 2 is on its way, and wreck off Angular 1.x from web. So you better learn that! :) And for Angular 1.x, here's what you can follow:

AngularJS Tutorials

No. Its not really that important. But Angular 2 is still in beta and would take some time to be common among developers. I think that it'd be a great programming language because of its versatility and strong coding team behind it. They're backed by Google, Microsoft, etc. like giants.

Meanwhile, if you ever want to learn Angular, or just the basics, you might consider this: AngularJS Tutorials

Just a walkthrough of Angular. Nothing stressful.

No book. Frankly speaking, HTML isn't *that* thing you'd actually need to look a book for. HTML is the simplest language which you can actually learn and apply on such a wide scale (i.e. web). Extremely easy to start learning, create a file, just write "Hello World" in that, and save it as .html file. BOOM. Your first HTML page.

However, obviously, you wouldn't like to end up as a messy designer who doesn't know, technically anything *deep* about HTML and CSS. And since you mention JavaScript, I believe you'd be interested in learning the "frontend" programming language i.e. the end where your users (visitors) are.

With a little dedication and concentration, you don't need a single book to learn those. You just need to spend as much time as you can with these languages. And obviously, just gazing at tutorials and videos (links below) would eventually be lost somewhere in your mind. So, the best practice would be to learn a bit, and start a project on it. No matter how small it is, just make sure you are trying to do something you can't do. That way, you'll do research on various sources as well (like googling, stackoverflow, etc.) which would reveal new things in front of you.

Lastly saying, don't give up. There would come a moment where you'll just say  "this is it. This won't work. I'm quitting." Don't.

Video Tutorials For HTML/CSS: HTML and CSS Tutorials

Written Guide For HTML: HTML (HyperText Markup Language)

Written Guide For CSS: Welcome To CSS | Learn HTML