Optimal/preferred way to call 'SP.ClientContext.executeQueryAsync' in SharePoint

Question

I have been learning client-side object model and came across the method executeQueryAsync. I found there are quite a few ways to call this method. Some of the one I found were

Answer 1

Please try the below answer...this should help..Below code uses the context.ExecutequeryAsync method but since the items are captured separately on a string array there should not be any issues with respect to asynchronous behavior..

Show Items​​​​​