From 562a9a52d599d9a05f871404050968a5fd282640 Mon Sep 17 00:00:00 2001 From: elioat Date: Wed, 23 Aug 2023 07:52:19 -0400 Subject: * --- js/games/nluqo.github.io/~bh/part1.html | 66 +++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 js/games/nluqo.github.io/~bh/part1.html (limited to 'js/games/nluqo.github.io/~bh/part1.html') diff --git a/js/games/nluqo.github.io/~bh/part1.html b/js/games/nluqo.github.io/~bh/part1.html new file mode 100644 index 0000000..5391611 --- /dev/null +++ b/js/games/nluqo.github.io/~bh/part1.html @@ -0,0 +1,66 @@ + + +Simply Scheme part I introduction + + +Simply Scheme 2/e Copyright (C) 1999 MIT +

Introduction: Functions

+ + +

+ +	+Brian +Harvey Matthew +Wright University of California, Berkeley + MIT +Press web page for Simply Scheme +

+ +

(back to Table of Contents) + +

+ +

The purpose of these introductory pages before each part of the book is to +call attention to a big idea that runs through all the work of several +chapters. In the chapters themselves, the big idea may sometimes be hidden +from view because of the technical details that we need to make the idea +work. If you ever feel lost in the forest, you might want to refer back +here. + +

In these first two chapters, our goal is to introduce the Scheme programming +language and the idea of using functions as the building blocks of a +computation. + +

The first chapter is a collection of short Scheme programs, presented to +show off what Scheme can do. We'll try to explain enough of the mechanism +so that you don't feel completely mystified, but we'll defer the +details until later. Our goal is not for you to feel that you could +re-create these programs, but rather that you get a sense of what +kinds of programs we'll be working with. + +

The second chapter explores functions in some detail. Traditionally, +computer programs are built out of actions: First do this, then do +that, and finally print the results. Each step in the program does +something. Functional programming is different, in that we are less +concerned with actions and more concerned with values. + +

For example, if you have a pocket calculator with a square root button, you +could enter the number 3, push the button, and you'll see something like +1.732050808 in the display. How does the calculator know? There are +several possible processes that the calculator could carry out. One +process, for example, is to make a guess, square it, see if the result is +too big or too small, and use that information to make a closer guess. +That's a sequence of actions. But ordinarily you don't care what actions +the calculator takes; what interests you is that you want to apply the +square root function to the argument 3, and get back a +value. We're going to focus on this business of functions, arguments, +and result values. + +

Don't think that functions have to involve numbers. We'll be working with +functions like "first name," "plural," and "acronym." These functions +have words and sentences as their arguments and values. + +

(back to Table of Contents) + + -- cgit 1.4.1-2-gfad0