Sex offenders web site - ProgrammingFundamentals, PartIIYour tour of programming fundamentals continues in
ProgrammingFundamentals, PartIIYour tour of programming fundamentals continues in this chapterwith subjects that have more intriguing possibilities. For exam- ple, I show you how programs make decisions and why a programmust sometimes repeat statements over and over. Before you re fin- ished here, you will learn how to use one of the most powerful infor- mation holders in the JavaScript language: the array. Decisions and LoopsEvery waking hour of every day you make decisions of some kind most of the time you probably don t even realize it. Don t think so? Well, look at the number of decisions you make at the grocery store, from the moment you enter the store to the moment you clear thecheckout aisle. No sooner do you enter the store than you are faced with a decision. Based on the number and size of items you intend to buy, do you pickup a hand-carried basket or attempt to extricate a shopping cart fromthe metallic conga line near the front of the store? That key decisionmay have impact later when you see a special offer on an item that istoo heavy to put into the hand basket. Next, you head for the food aisles. Before entering an aisle, you com- pare the range of goods stocked in that aisle against items on yourshopping list. If an item you need is likely to be found in this aisle, you turn into the aisle and start looking for the item; otherwise, youskip the aisle and move to the head of the next aisle. Later, you reach the produce section in search of a juicy tomato. Standing in front of the bin of tomatoes, you begin inspecting themone by one picking one up, feeling its firmness, checking the color, looking for blemishes or signs of pests. You discard one, pick upanother, and continue this process until one matches the criteria youset in your mind for an acceptable morsel. Your last stop in the storeis the checkout aisle. Paper or plastic? the clerk asks. One moredecision to make. What you choose impacts how you get the gro- ceries from the car to the kitchen as well as your recycling habits. 77CHAPTER …In This ChapterHow control structuresmake decisionsHow to define functionsWhere to initializevariables efficientlyWhat those darnedcurly braces are allaboutThe basics of dataarrays …
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