I clicked on the Builder Pattern , it linked to a file but it would be more interesting to have a bit of an explanation. That why UML diagrams are usefull. righ

I clicked on the Builder Pattern , it linked to a file but it would be more interesting to have a bit of an explanation. That why UML diagrams are usefull. right now https://github.com/shichuan/javascript-patterns/blob/master/design-patterns/builder.html https://github.com/shichuan/javascript-patterns/blob/master/... is hard to understand. I would propose a simple exemple for the builder pattern . let's say we have an array of datas : [0,10,200,50] and we want a representation of the data. So the director would use different builders to represent these datas ( a bar chart , a line chart , etc ...). What i find important with design patterns and often lacking in books is real use cases.You often get strange exemples that , may be interesting but you actually can use them in a real application. Usually the builder ,the fly-weight and the chain of reponsability are often explained badly or with horrible exemples. I dream of a book that does 2 things : - explain each pattern with real exemples and propose a list of real uses cases where the pattern would be usefull - has an extended tutorial at the end of the book the makes the user actually build a full application with all the patterns studied. For instance , a drawing application with different shapes, pens , filters , commands , menus , undo , redo , data serialization , that would use all the main design patterns and make them work together. If such a book exists ( in java , as3 , C# , javascript ,... (just not in C++ or smalltalk ;) ) ) , i would be interested to know about it. Now javascript has some patterns of its own ( module pattern , etc ... ) that's interesting to know them too.