Solving Issue with Finding 3 Random Questions Efficiently
In a problem scenario where a loop runs until a certain condition is met to find 3 random questions, a potential solution is to limit the loop iterations using a counter mechanism. By setting a counter to restrict the loop to a reasonable number of runs, like 150, the process becomes more efficient and prevents exceeding free reads from Firebase. Additionally, the use of useRef Hook in React can help manage mutable reference objects effectively for state management in components.
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Presentation Transcript
Ask Ouija App-Lab By: Dr. Taha Havakhor Assistant Professor of MIS
A problem with finding 3 random questions The loop will run until the while condition is true Can logically exceed 50k free reads from Firebase if it does not find at least 3 questions Let s fix it!
Solution? Set a counter to make sure the loop won t run for more than a limited number- for finding 3 random questions 150 runs is more than enough! Class discussion: Why can t we use a local variable or a state variable?
useRef Hook const refContainer = useRef(initialValue); useRef returns a mutable ref object whose .current property is initialized to the passed argument (initialValue). Essentially, useRef is like a box that can hold a value in its .current property. To get and change the value you must reference refContainer.current
