medium10 pts · first answer countsjavascriptclosures

Keeping a balance private

A wallet module should let code call deposit() and getBalance() but never set the balance directly. Which approach gives real privacy without a class?

A.Keep balance in a local variable and return functions that close over itB.Store balance on the returned object with a leading underscoreC.Store balance on window with a hard-to-guess nameD.Freeze the returned object with Object.freeze

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Keeping a balance private

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