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Whatsapp needs only 50 Engineers...!!!!



WhatsApp is possessed by Facebook, after Zuckerberg and organization paid $19 billion for the startup somewhat more than a year back. That implies Facebook now runs three of the most well known applications on the web. Its essential long range interpersonal communication administration is utilized by more than 1.5 billion individuals around the world, and Facebook Messenger, a texting administration spun off from Facebook legitimate, compasses 700 million. Be that as it may, the 900 million-user milestone declared by Koun is all that much a WhatsApp accomplishment, not a result of the impressive Facebook machine.

One of the (numerous) captivating parts of the WhatsApp story is that it has accomplished such gigantic scale with such a modest group. At the point when the organization was procured by Facebook, it had 35 builds and come to more than 450 million clients. Today, it utilizes just around 50 engineers, however the quantity of WhatsApp clients has multiplied, and this minor designing staff keeps on running things completely all alone. In our current reality where such a variety of web administrations are quickly growing to heaps of clients, WhatsApp demonstrates the path forward—in any event to some extent. 

WhatsApp doesn't speak much about its building work—or whatever other piece of its operation, besides—however yesterday, at an occasion in San Jose, California, WhatsApp programming designer Jamshid Mahdavi made that big appearance to quickly talk about the organization's fairly strange techniques. A trap's piece is that the organization manufactures its administration utilizing a programming dialect called Erlang. In spite of the fact that not too mainstream over the more extensive coding group, Erlang is especially appropriate to juggling interchanges from an enormous number of clients, and it lets architects convey new code on the fly. In any case, Mahdavi says that the trap is as much about mentality as innovation. 


Mahdavi joined WhatsApp around two years back, after the startup was up and running, and its way to deal with building was not at all like any he had seen—to some degree on the grounds that it utilized Erlang and a PC working framework called FreeBSD, additionally in light of the fact that it endeavored to keep its operation so basic. "It was a totally distinctive method for building a high-scale foundation," he said on Monday. "It was an eye-opener to see the moderate way to deal with taking care of … simply the issues that should have been be unsolved .

Code in Parallel 

In utilizing Erlang, WhatsApp is a piece of a bigger push towards programming dialects that are intended for simultaneousness, where numerous procedures keep running in the meantime. As web administrations reach more individuals—and juggle more assignments from every one of those individuals—such dialects turn out to be more appealing .

Actually with its new hostile to spam framework—a framework for distinguishing vindictive and generally undesirable messages on its interpersonal organization—Facebook utilizes a dialect called Haskell. Haskell started as a sort of scholarly trial in the late '80s, it's still not utilized all that regularly. Be that as it may, it's optimal for Facebook's spam battling on the grounds that it's so great at juggling parallel undertakings—and in light of the fact that it lets coders tackle earnest errands so rapidly. Then, Google and Mozilla, creator of the Firefox program, are taking a stab at a comparative sweet spot with new language called Go and Rust.


Thin-Filmed Solar Cell Tracks Sunlight At Many Angles 

When the Kirigami polymide film is stretched its forms a mesh that can be controlled to "within an accuracy of one degree," according to University of Michigan researchers. This will increase the efficiency of the solar cells.


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