Check out these great sites you can learn coding for free .

1. CodeAcademy

2. edX

3.Udemy

4. aGupieWare

5. GitHub

6. MIT Open Courseware

7. Code Avengers

8. Hack.pledge()

9. Khan Academy

10. Free Food Camp

11. HTML5 Rocks

12. Coursera

You can capture your entire screen or just a selected portion of it. The screenshot is automatically saved to your desktop.

How to take a screenshot of your entire screen

1. Press Shift-Command (⌘)-3.
2. Find the screenshot as a .png file on your desktop.

How to take a screenshot of a selected portion of your screen

This works with windows in the Finder and most apps.

1. Press Shift-Command-4. The pointer changes to a crosshair.
2. Move the crosshair to where you want to start the screenshot, then drag to select an area.
   While dragging, you can hold Shift, Option, or Space bar to change the way the selection moves. 
   

   How to take a screenshot of a window

3. Press Shift-Command-4. The pointer changes to a crosshair.
4. Press the Space bar. The pointer changes to a camera.
5. Move the camera over a window to highlight it.
6. Click your mouse or trackpad. To cancel, press the Esc (Escape) key before you click.
7. Find the screenshot as a .png file on your desktop.

 How to take a screenshot of a menu

1. Click the menu to reveal its contents.
2. Press Shift-Command-4. The pointer changes to a crosshair.
3. Drag to select the menu.
4. Release your mouse or trackpad button. To cancel, press the Escape (esc) key before you release the button.
5. Find the screenshot as a .png file on your desktop.

These steps capture the contents of a menu, but not its title:

1. Click the menu to reveal its contents.
2. Press Shift-Command-4. The pointer changes to a crosshair.
3. Press the Space bar. The pointer changes to a camera.
4. Move the camera over the menu to highlight it.
5. Click your mouse or trackpad. To cancel, press the Esc (Escape) key before you click.
6. Find the screenshot as a .png file on your desktop.
   

   How to take a screenshot of the Touch Bar

   1. If you have a Mac with a Touch Bar and macOS Sierra 10.12.2 or later:
   2. Press Shift-Command-6.Find the screenshot as a .png file on your desktop.

You can also customize the Control Strip region of your Touch Bar to include a Screenshot button. Then tap the Screenshot button to see options for the type of screenshot and where to save it.

Read more

Over the past numerous years, public interest in cryptocurrencies has accelerated dramatically. The main awareness of this hobby has been Bitcoin, which, following the discharge of its first public patron in 2009, has end up the dominant call in cryptocurrency. In current years, however, many other cryptocurrencies have entered the scene. Among those, one name which has garnered increasing interest is Litecoin. Indeed, Litecoin’s own developers have lengthy stated that their aim is to create the “silver” to Bitcoin’s “gold”. In this newsletter, we can explore the similarities and differences between these  leading cryptocurrencies.

On the floor, Bitcoin and Litecoin proportion lots in commonplace. At the most fundamental stage, they're of course each cryptocurrencies. Whereas kingdom currencies along with the U.S. Greenback or the yen rely on political and criminal mechanisms for cost and legitimacy, cryptocurrencies depend simplest at the cryptographic integrity of the network itself. Yet Bitcoin and Litecoin additionally vary in crucial respects. In what follows, we can cope with four in their maximum important variations, progressing from the maximum honest differences to the greater complicated.

Market Capitalization and Popularity

At the time of writing, Bitcoin’s market capitalization sits at more or less $217 billion. Whether this determine moves you as either excessive or low will rely in large part for your historical attitude. When we recall that Bitcoin’s market capitalization turned into barely $42,000 in July 2010, its cutting-edge parent seems wonderful. While Bitcoin remains via a long way the maximum notably valued participant inside the cryptocurrency space, others including Ethereum, Ripple and Litecoin are catching up.

We can now ask the question, what other traits set Bitcoin and Litecoin apart?

Total Amount of Coins

One of the principle variations among Bitcoin and Litecoin worries the overall quantity of cash which every cryptocurrency can produce. The Bitcoin community can never exceed 21 million cash, whereas Litecoin can accommodate up to eighty four million cash. Although in theory this seems like a enormous advantage in favor of Litecoin, its real-world results may be negligible. This is because of the fact that both Bitcoin and Litecoin are divisible into almost infinitesimal amounts. In reality, the minimal amount of transferable bitcoin is a hundred millionth of a bitcoin (zero.00000001 bitcoins) recognized colloquially as one “satoshi.” Users of both forex ought to therefore have no trouble shopping low-priced items or offerings, irrespective of how excessive the overall fee of an undivided unmarried bitcoin or litecoin may additionally end up.

Despite this, Litecoin’s greater range of most coins may provide a mental advantage over Bitcoin, due to its (thus far) smaller fee for a single unit. In a video interview posted via IBM’s banking department in November 2013, IBM govt Richard Brown raised the prospect that some users can also choose transacting in complete devices in place of in fractions of a unit—a ability gain for Litecoin.Yet even assuming that this is proper, this hassle can be solved via simple software program modifications added at the extent of the virtual wallets via which Bitcoin transactions are made. As Tristan Winters points out in a November 2013 Bitcoin Magazine article, “The Psychology of Decimals,” popular Bitcoin wallets including Multibit and Electrum already provide customers the choice of displaying the cost of their bitcoins in phrases of reliable (or fiat) currencies consisting of the U.S. Dollar. This can help keep away from the  psychological aversion to dealing in fractions while using bitcoin.

Transaction Processing Speed

Although technically transactions occur right away on both the Bitcoin and Litecoin networks, time is needed so as for the ones transactions to be showed by different community participants. According to information from Blockchain.Data, the Bitcoin network’s long-time period common transaction confirmation time is just over 9 minutes consistent with transaction. The equivalent parent for Litecoin is roughly 2.Five mins, in line with records from BitInfoCharts.Com. In precept, this difference in affirmation time may want to make Litecoin greater attractive for merchants. For example, a merchant selling a product in alternate for Bitcoin would want to wait nearly four times as long to verify charge as if that identical product have been sold in change for Litecoin. On the opposite hand, traders can continually favor to receive transactions with out watching for any confirmation in any respect. The protection of such 0-affirmation transactions is the situation of a few debate. However, current innovations which includes Bitpay’s proposed Inter-Channel Payments system (nicknamed “Impulse”) might also make those styles of instantaneous transactions appreciably extra relaxed, mitigating Litecoin’s faster confirmation time gain.

Different Algorithms: Bitcoin’s SHA-256 vs. Litecoin’s Scrypt

By far the maximum fundamental technical difference among Bitcoin and Litecoin are the exclusive cryptographic algorithms which they rent. Bitcoin makes use of the longstanding SHA-256 set of rules, whereas Litecoin makes use of a relatively new algorithm called Scrypt.

The major practical significance of those one of a kind algorithms is their impact at the technique of “mining” new cash. In both Bitcoin and Litecoin, the manner of confirming transactions requires giant computing energy. Some contributors of the currency network, referred to as miners, allocate their personal computing sources closer to the mission of confirming the transactions of other users. In change for doing so, those miners are rewarded through earning gadgets of the forex which they've mined. (Read more What Is Bitcoin Mining?)

SHA-256 is typically taken into consideration to be a greater complicated set of rules than Scrypt, whilst on the same time permitting a greater diploma of parallel processing. Consequently, Bitcoin miners in current years have applied increasingly sophisticated methods for mining bitcoins as effectively as viable. Today, the maximum dominant approach for Bitcoin mining consists of the use of Application-Specific Integrated Circuits (ASICs). These are hardware systems which, in contrast to the simple CPUs and GPUs which got here earlier than them, may be tailored for the sole cause of mining bitcoins. The realistic result of this innovation has been that Bitcoin mining has turn out to be an increasing number of out-of-reach for the normal person.

Crypt, by way of evaluation, become deliberately designed to be much less prone to the types of custom hardware answers hired in ASIC-based totally mining. This has led many commentators to view Scrypt-primarily based cryptocurrencies, consisting of Litecoinm as being extra on hand for customers who additionally wish to take part inside the community as miners. In current years, however, businesses inclusive of Zeus and Flower Technology have brought Scrypt AISCs to the marketplace, suggesting that Litecoin’s vision of without difficulty handy mining may additionally end up a factor of the beyond.

The Bottom Line

While Bitcoin and Litecoin may be the gold and silver of the cryptocurrency area nowadays, history has proven that the popularity quo on this dynamic and emerging zone can change profoundly in even some months. It stays to be visible whether or not the cryptocurrencies with which we have end up acquainted will retain their stature within the months and years to come. (Read more The five Most Important Virtual Currencies Other Than Bitcoin)

Messaging app WhatsApp has ultimately rolled out its new WhatsApp Business app in Nigeria. The app that's currently to be had for Android, is now available for Nigerians to download thru the Google Play keep. It is compatible with gadgets jogging Android four.Zero.Three and above. A version with similar functions is also predicted to be to be had for iOS gadgets (iPhone) in the coming destiny.

WhatsApp had formerly announced the app’s arrival and all started verifying business debts as part of its WhatsApp Business pilot software back in September 2017. Before now, the business enterprise has been trying out the beta version of WhatsApp Business in choose international locations which include US, UK, Italy, Indonesia, and Mexico.

Targeted at small businesses, the WhatsApp for Business app lets in enterprise proprietors to hook up with their clients and be a part of the messaging platform that has over 1.3 billion customers worldwide. Unlike the unique WhatsApp app, the business-centric supplying lets in businesses to create their very own Whatsapp business profiles with records including commercial enterprise description, e mail, or keep addresses, and internet site.

The app also has functions that encompass whatsapp confirmed enterprise account listing, labels – for sorting contacts, messaging gear inclusive of quick replies, greeting messages and away messages. Further, there are metrics together with the wide variety of messages despatched, added, read and WhatsApp Web support to allow corporations send and get hold of messages directly through a laptop.

In phrases of some foremost similarities with the original WhatsApp Messenger, the WhatsApp Business app lets in agencies to set privacy for his or her profile image, approximately facts, and status in addition to permits them to block any of their contacts and enable read receipts. The app additionally has a live place feature that helps corporations share their live place with their clients and clients.

It addition, the whatsapp enterprise cellular software lets in agencies to make voice and video calls. Notably, the app gives cease-to-cease encryption for all the messages and calls it circulates to restriction any 1/3-party get right of entry to.

Customers gained’t want to put in new apps as messages despatched from WhatsApp Business may be obtained on WhatsApp Messenger as common.

While several early customers of Whatsapp business app in Nigeria stated they had been inspired, they discovered that several essential capabilities that small agencies need are still missing inclusive of receiving bills and the opportunity of finding ability customers. Well, allow’s hope they roll out the ones capabilities within the nearest destiny.

Are you the use of Whatsapp enterprise app? Feel free to proportion your experience.

Techpavillion as we all know is here to update you on trending tech news , yeah that's our call and we gonna fulfill that however we advice you to share this article with your love ones if you find it useful stay tuned as we discuss below the common web terminologies  we all ought to know.

WWW 

 A procedure of internet servers that support mainly formatted documents. The records are formatted in a language called HTML (HyperText Markup Language) that supports links to other files, as good as photographs, audio, and video files. This implies which you can leap from one document to one other readily by clicking on hot spots. No longer all internet servers are part of the arena huge web. Quick for World large web Consortium, an global consortium of corporations involved with the internet and the online. The W3C was situated in 1994 with the aid of Tim Berners-Lee, the fashioned architect of the sector large internet. The institution's motive is to increase open specifications in order that the net evolves in a single direction as a substitute than being splintered among competing factions. The W3C is the chief specifications body for HTTP and HTML.

 URL 

URLs make it possible to direct both people and software purposes to a form of knowledge, available from a quantity of exclusive web protocols. Abbreviation of Uniform useful resource Locator, the worldwide address of records and other resources on the arena wide web. The first part of the deal with suggests what protocol to use, and the 2nd part specifies the IP address or the area name where the resource is placed.

Protocol://domain_name.Organization_type/full-course-of-file how://where/what As an activity, let's seem at this file's URL: http://www.Netspace.Org/users/dwb/url-guide.Html The scheme for this URL is "http" for the HyperText transfer Protocol. The web deal with of the machine is "www.Netspace.Org", and the path to the file is "users/dwb/www-authoring.Html".


When working with the WWW, most URLs will show up very similar to this one's total structure. Observe that after utilizing FTP, HTTP, and Gopher URLs, the "full-path-of-file" will oftentimes result in a cut back. This suggests that the URL is pointing to not a designated file, however a listing. In this case, the server most likely returns the "default index" of that directory.

This possibly just a listing of the documents available inside that listing, or a default file that the server mechanically appears for within the listing. With HTTP servers, this default index file is probably called "index.Html", but is quite often noticeable as "homepage.Html", "residence.Html", "welcome.Html", or "default.Html".

HTML 

HyperText Markup Language, the authoring language used to create files on the world huge net. Hypertext, for handy navigation among resources (e.G. HyperText Markup Language or HTML, a general format for describing the constitution of records for transmission of hypermedia files). HTML records are ASCII records with embedded codes for logical markup, format (textual content styles, file titles, paragraphs, tables) and hyperlinks.


Hypertext, for easy navigation among assets (e.G. HyperText Markup Language or HTML, a typical format for describing the constitution of files for transmission of hypermedia records). HTML documents are ASCII files with embedded codes for logical markup, structure (textual content patterns, document titles, paragraphs, tables) and hyperlinks.

Internet

A worldwide network connecting hundreds of thousands computers. As of 1998, the web has more than 100 million customers global, and that quantity is developing rapidly. More than a hundred countries are linked into exchanges of information, information and opinions.

Not like on-line services, which might be centrally controlled, the web is decentralized by means of design. Each internet laptop, called a host, is unbiased. Its operators can opt for which web offerings to make use of and which regional services to make to be had to the global internet neighborhood. Remarkably, this anarchy with the aid of design works tremendously well. There are a form of methods to access the web.

Most online services, such as america on-line, present entry to a few internet services. It is also possible to obtain entry via a commercial internet provider supplier (ISP). For many of its existence the web was once notably a study and educational network.

Lately, industrial firms and a huge quantity of buyers have come to recognize the internet's abilities. Today humans and firms around the globe can use the internet to retrieve know-how, be in contact and conduct business globally, and access a titanic array of offerings and resources on-line.

ISP

Internet service supplier, a corporation that provides access to the internet. For a month-to-month price, the provider provider gives you a software bundle, username, password and entry telephone quantity. Equipped with a modem, which you can then go browsing to the web and browse the sector wide web and USENET, and send and receive email.

In addition to serving members, ISPs also serve giant corporations, offering an instantaneous connection from the organization's networks to the web. ISPs themselves are related to 1 yet another by way of community access aspects (NAPs). ISPs are often known as IAPs (internet entry vendors).

Hypertext

Hypertext simply method non linear textual content. A novel or magazine article is an illustration of linear textual content due to the fact that it's meant to be read from opening to finish. Non linear conversation is way harder to create because you ought to allow for the likelihood of each and every reader gaining access to the material in a different order.

Home page 

The essential page of a web page. Normally, the house page serves as an index or desk of contents to different files saved at the web page.

Http

HyperText transfer Protocol, the underlying protocol utilized by the arena vast web. HTTP defines how messages are formatted and transmitted, and what actions web servers and browsers should take in response to various instructions. For example, when you enter a URL in your browser, this absolutely sends an HTTP command to the online server directing it to fetch and transmit the requested net page.

 HTTP is known as a stateless protocol because every command is done independently, with none advantage of the instructions that came before it. That is the main rationale that it is difficult to implement websites that react intelligently to user enter.

This shortcoming of HTTP is being addressed in a number of latest technologies, together with ActiveX, Java, JavaScript and cookies. Presently, most internet browsers and servers aid HTTP 1.1.

Some of the major features of HTTP 1.1 is that it helps  power connections. Which means that once a browser connects to an internet server, it could actually obtain multiple documents through the equal connection. This will have to beef up performance by using as so much as 20%.

Browser

Web browser, a software utility used to find and display web pages. The 2 most general browsers are Netscape Navigator and Microsoft internet Explorer. Both of those are graphical browsers, because of this that they can show images as good as textual content. Moreover, most ultra-modern browsers can gift multimedia information, including sound and video, although they require plug-ins for some formats.

web page 

A record on the WWW. Each web page is identified by a special URL (Uniform useful resource Locator).

 

Web site

A site (location) on the World Wide Web. Each Web site contains a home page, which is the first document users see when they enter the site. The site might also contain additional documents and files. Each site is owned and managed by an individual, company or organization.

Markup tags

The accessories of HTML.

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