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Write a function named 'Once' which accept another function 'sum' ( function sum(a,b){return a+b;}) and return a function and when this returned function called, it should return result of 'sum' (i.e a+b ) passed to 'Once' function. And every time it should return same result that got at first call .
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UI Developer

Interviewed at Dream11

4.2★
Jan 2, 2019

Write a function named 'Once' which accept another function 'sum' ( function sum(a,b){return a+b;}) and return a function and when this returned function called, it should return result of 'sum' (i.e a+b ) passed to 'Once' function. And every time it should return same result that got at first call .

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