function StockQuoteGeneratorArrow ( symbol ) { this . symbol = symbol ; setInterval ( ( ) => { console . log ( "Fat arrow. The price of " + this . symbol + " is " + Math . random ( ) ) ; } , 3000 ) ; } const stockQuoteGeneratorArrow = new StockQuoteGeneratorArrow ( "IBM" ) ; function StockQuoteGeneratorAnonymous ( symbol ) { this . symbol = symbol ; setInterval ( function ( ) { console . log ( "   Anonymous.The price of " + this . symbol + " is " + Math . random ( ) ) ; } , 3000 ) ; } const stockQuoteGeneratorAnonymous = new StockQuoteGeneratorAnonymous ( "IBM" ) ;