After following the procedure given in https://apple.stackexchange.com/a/232678/331833, my launchpad spontaneously resets itself!
defaults -currentHost write com.apple.dock ResetLaunchPad -bool true; killall Dock
Apps I pulled out of the "other" folder (because I use them regularly) returned to that folder.
Other apps that I have no interest in ever using (and sincerely wish the folks in Cupertino hadn't bundled), and which I'd put in either "Others" or a folder marked "Stuff I neither want nor need," cluttering up the first page of the launchpad.
(Oh, and the "Stuff I neither want nor need" folder itself disappears, and Eclipse moves back into a folder of its own.)
How do I fix this? Why is it resetting every time I reboot? Could it be the part before the semicolon? If so, how do I undo it?