tailieunhanh - Javascript bible_ Chapter 53

Tham khảo sách 'javascript bible_ chapter 53', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Application Decision Helper The list of key concepts for this chapter s application looks like the grand finale to a fireworks show. As JavaScript implementations go the application is in some respects over the top yet not out of the question for presenting a practical interactive application on a Web site lacking control over the server. The Application I wanted to implement a classic application often called a decision support system. My experience with the math involved here goes back to the first days of Microsoft Excel. More recently I put the concepts to work for the former MacUser magazine in an application that assisted Macintosh shoppers in selecting the right model for their needs. Rather than design a program that had limited appeal covering only one possible decision tree I set out to make a completely user-customizable decision helper. All the user has to do is enter values into fields on a number of screens the program performs the calculations to let the user know how the various choices rank. Although I won t be delving too deeply into the math inside this application it s helpful to understand how a user approaches this program and what the results look like. The basic scenario is a user who is trying to evaluate how well a selection of choices measure up to his or her expectations of performance. User input includes the following 4- The name of the decision 4 The names of up to five alternatives people products ideas and so on 4 The factors or features of concern to the user 4 The importance of each of the factors to the user 4 A user ranking of the performance of every alternative in each factor 4- 4 4 In This Chapter Multiple frames Multiple-document applications Multiple windows Persistent storage cookies Scripted image maps Scripted charts 4- 4- 4- 74 JavaScript Applications What makes this kind of application useful is that it forces the user to rate and weigh a number of often-conflicting factors. By assigning hard numbers to these elements

TỪ KHÓA LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.