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"Cannot set 0 of undefined"
Can someone help fix this error? I don't get it, I HAVE defined it. It's let i=0 and let j=0. I don't get this. https://code.sololearn.com/WkPVSx6Q7Qra/?ref=app
1 Answer
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you'll also need to initialize the elements of box_arr as an array.
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