How do you truncate a file using node.js?

338

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I have ten columns that needs to be totalled... but some columns are empty...how do i get sum all the columns even if sum are empty? Can i get a total of the rows instead of columns? if yes, what is the function to be used?

1749

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Explain two easy sql optimizations.

769

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List the common jdbc exceptions ?

747

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Is html an oop?

746

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What are the two methods of control in ac voltage controllers?

742

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How many capacitors using in LT panel as per Govt rules?

1680

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what are Equity shares,Preference shares,Bonus shares,Bond,Debentures,Dividend?

4592

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Why we use struts over servlets?

707

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For overhead protection we use which transformer?

2148

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Will it create any problem if we add elements with key as user defined object into the treemap?

676

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What is difference between data abstraction and encapsulation?

807

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What are the common errors done by technician while handling pipette?

842

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How do I define raw_input in python?

616

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What is the disadvantage of a call by reference?

829

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