Download A small matter of programming: perspectives on end-user by Bonnie A. Nardi PDF

By Bonnie A. Nardi

A Small subject of Programming asks why it's been so tricky for finish clients to command programming strength and explores the issues of finish user-driven software improvement that needs to be solved to come up with the money for finish clients higher computational power.Drawing on empirical examine on present finish consumer structures, A Small subject of Programming analyzes cognitive, social, and technical problems with finish person programming. particularly, it examines the significance of task-specific programming languages, visible software frameworks, and collaborative paintings practices for finish person computing, with the target of assisting designers and programmers comprehend and higher fulfill the desires of finish clients who wish the aptitude to create, customise, and expand their functions software.The rules within the e-book are in keeping with the author's study on profitable finish person programming structures - spreadsheets and CAD structures - in addition to different empirical study. Nardi concentrates on large concerns in finish consumer programming, specially finish clients' strengths and difficulties, introducing instruments and strategies as they're with regards to higher-level consumer issues.Bonnie A. Nardi is a Member of the Technical employees at Hewlett Packard Laboratories.

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A lot of the mathematics taught in school is about numbers, but we’ve seen that functions don’t have to be about numbers. We’ve used functions of words and sentences, such as first, and even functions of functions, such as keep. You can imagine functions that transform information of any kind at all, such as the function French(window)=fenˆetre or the function capital(California)=Sacramento. You’ve done a lot of thinking about the domain and range of functions. You can add two numbers, but it doesn’t make sense to add two words that aren’t numbers.

She hands that result to Alonzo, who prints it. How does Alonzo know what’s the argument to what? That’s what the grouping of subexpressions with parentheses is about. Since the plus expressions are inside the minus expression, the plus people have to give their results to the minus person. We’ve made it seem as if Bernie does his work before Cordelia does hers. In fact, the order of evaluation of the argument subexpressions is not specified in Scheme; different implementations may do it in different orders.

Try different kinds of numbers, including integers and numbers with decimal fractions. What if you try to divide by zero? Throughout this chapter we are going to let you experiment with functions rather than just give you a long, boring list of how each one works. ) Try these: Function: / Argument: 1 Argument: 987654321987654321 Function: remainder Argument: 12 Argument: -5 * If you get no response at all after you type (functions), just press the Return or Enter key again. Tell your instructor to read Appendix A to see how to fix this.

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