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Why we use migration in rails?
How do you disable a button depending on a checkbox’s state?
Explain the uses of
Why is the block display style used for animations?
What is an event loop in node.js and how does it work?
What are state and props in reactjs?
Does node.js supports cryptography?
What features of jquery, has been used in web applications?
What is the use of pagecontext in jsp?
Elaborate on perl bite-wise operators.
What is ng-model in angularjs?
Explain JSP Output comments?
Is angularjs a factory singleton?
Difference between window, document, and screen in Javascript?
I have an excel sheet with multiple ID's in a column. Now i need fetch those ID's in an application and check whether if it already exist in the DB. If not then i have to go with the process of inserting them in the DB. If it exists then i need to skip that ID and move to the next ID and check the same and proceed. How can i do that with for loop and if condition?
