1999 Honda Accord Car dies when go slow or stopped and idli

Car has been dying when idle or when going slow to stop. Starts right back up. When I first start it in the morning, it's fine, but once it gets warmed up, this happens. Might be a correlation to very hot weather and very cold weather or just when the car has been sitting for long length of time and cools off.
Usually at red lights I put it in neutral but give it gas so it doesn't die. I've heard it could be the computer, or something to do with the fuel injector.