Fix wire/cord for a lamp - Don't know polarity

Hi, the answer to your lamp cord is , if you look close at the cord,one side has a ribbed edge the length of the cord, that is the neutral/ white, that goes to the silver screw on both sides. The smooth side is hot/black, goes to the gold or black screw. The lamp will work if it's not correct, but the code says the center of the socket shall be the hot and the outer cup needs to be the neutral for safety.

Awesome, that is exactly what I needed! I fixed the lamp and it works now. Thank you so much!!!