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Showing posts from September, 2020

What is polymorphism and why we use it ?

Polymorphism means one name multiple form. There are two type of polymorphism 1.Compile Time and Run Time
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What is the map method in javascript ?

It is use for the iterate the array element basically it crate new array with result of calling function. EX: var numbers = [25, 36, 49, 64]; var sqrtNumbers = numbers.map(Math.sqrt)
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We have two server call and we are calling using the ajax and one call are depended on another then how can we achieve it.

There are two option : 1. Do the sync ajax call means set async to false 2. write the other call in success of first call
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what is the selector in jquey?

Selector is use for the get the element from the DOM. There are different type of selector like 1) Id => $("#id") 2) class => $(".class") 3) element => $("element")
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What is different between == and === in javascript ?

== operator don't check the type where as === is also check the type of variable while compare. ex : 5=="5" => true 5==="5" => false
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