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Why is ob_start used ?What is the difference between ob_flush and flush ?

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Why is ob_start used ?What is the difference between ob_flush and flush ?

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How to implement websockets using just javascript ( not even jquery ) and php?

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Madam, Please send the Makeup Scheme and Solutions for both PESIT and PESU.

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Madam, Please send the Makeup Scheme and Solutions for both PESIT and PESU.

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done

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How is Streaming different from multistage download? Both are used to display data part by part on the web page to give the user a faster service.

In multistage download the client issues a request and the a response is sent with respect to it. In streaming a persisitent connection is kept open and multiple responses are sent by checking readystate 3

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HOW CAN YOU SET UP MULTIPLE HOSTS ON XAMPP

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HOW CAN YOU SET UP MULTIPLE HOSTS ON XAMPP

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https://delanomaloney.com/2013/07/10/how-to-set-up-virtual-hosts-using-xampp/

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Why are large size blobs not downloading?

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Q:What do the different readyState values(0 through 4) mean?

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The acceptable values for the target attribute of a frame are
<form target="_blank|_self|_parent|_top|framename">

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http://softwareas.com/cross-domain-communication-with-iframes/

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Is Content -type header always requred?

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Does clicking form.submit() work same as clicking the submit button. Especially in terms of "required" attribute

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WHat happens if we put target of a form as div in the page

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Is multiple inheritance possible in JavaScript?
ANS

Some object-oriented languages allow multiple inheritance. That is, an object can inherit the properties and values from unrelated parent objects. JavaScript does not support multiple inheritance.

Inheritance of property values occurs at run time by JavaScript searching the prototype chain of an object to find a value. Because an object has a single associated prototype, JavaScript cannot dynamically inherit from more than one prototype chain.

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AJAX: When you make repeated calls to the same server resource wont the resource be cached?

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AJAX: When you make repeated calls to the same server resource wont the resource be cached?

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Ans Including teh following code in the page prevents it from being cached

<?php header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");//Dont cache header("Pragma: no-cache");//Dont cache header("Expires: Thu, 19 Nov 1981 08:52:00 GMT");//Make sure it expired in the past (this can be overkill) ?>

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What happens behind the scenes when you say
Square.prototype=new Rectangle()

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TO designate Rectangle as the parent of square why cant we say
Square.prototype=Rectangle.prototype?

ANS In this case any methods added to Square.prototype will be accessible to rectangle objects as well . These are object references

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function Foo() {
}
Foo.prototype.bar = "I'm bar on Foo.prototype";
Foo.bar = "I'm bar on Foo";
var f = new Foo();
console.log(f.bar)//gives undefined. why does is not print "I am foo on bar"

Explanation at http://stackoverflow.com/questions/9582341/adding-new-properties-to-constructor-function-without-prototype

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Can JS constructors be overloaded?
No.They cannot be overloaded as JavaScript is a dynamically typed language