Download JavaScript for Absolute Beginners (Getting Started) by Terry McNavage PDF

By Terry McNavage

While you're new to either JavaScript and programming, this hands-on e-book is for you. instead of staring blankly at gobbledygook, you will discover JavaScript by means of coming into and operating enormous quantities of code samples in Firebug, a unfastened JavaScript debugger. Then within the final chapters, you are going to go away the security of Firebug and hand-code an uber cool JavaScript software on your most well liked textual content editor. Written in a pleasant, enticing narrative variety, this leading edge JavaScript educational covers the subsequent necessities: middle JavaScript syntax, akin to worth forms, operators, expressions, and statements supplied through ECMAScript. positive aspects for manipulating XHTML, CSS, and occasions supplied through DOM. Object-oriented JavaScript, together with prototypal and classical inheritance, deep replica, and mixins. Closure, lazy loading, strengthen conditional loading, chaining, currying, memoization, modules, callbacks, recursion, and different robust functionality ideas. Encoding information with JSON or XML. distant scripting with JSON-P or XMLHttpRequest Drag-and-drop, lively scrollers, epidermis swappers, and different cool behaviors. Optimizations to make sure your scripts run snappy. Formatting and naming conventions to avoid you from having a look like a greenhorn. New ECMAScript five, DOM three, and HTML five beneficial properties corresponding to Object.create(), Function.prototype.bind(), strict mode, querySelector(), querySelectorAll(), and getElementsByClassName(). As you can find, as a result of its clean process, this publication is in no way watered down. for that reason, over the process your trip, you are going to pass from JavaScript newbie to wizard, buying the abilities recruiters hope.

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Changing to a “1” will happen. zzzz" 33 CHAPTER 2 ■ TYPE CONVERSION Figure 2–9. Converting to uppercase or lowercase Turkish has dotted and dotless versions of i: • i • Iı The lowercase version of I is ı, not i. Conversely, the uppercase version of i is , not I. So for Turkish, toLowerCase() and toLowerCase() would mess up the i pairings. toLocaleUpperCase() // "" ■ Note toLocaleLowerCase() and toLocaleUpperCase() convert case based on your OS settings. You’d have to change those settings to Turkish for the previous sample to work.

Note that final element, "Mission to Marzipan", is not followed by a comma. Note too that JavaScript numbers flavors from 0 to 9. Although "New York Super Fudge Chunk" is 3 in my heart, it’s 2 to JavaScript: var iceCream = [ "Chocolate Fudge Brownie", "Half Baked", "New York Super Fudge Chunk", "Coffee Heath Bar Crunch", "Cherry Garcia", "Mud Pie", "Milk & Cookies", "Cinnamon Buns", "Chocolate Chip Cookie Dough", "Mission to Marzipan" ]; To query an element in iceCream, put its number in the [] operator.

Although the following two comparisons are equivalent, I’m guessing you were only able to key in the first in Firebug. Figure 2–8 displays both, however. var id = "Dr. charAt(10) === "ü"; // true 32 CHAPTER 2 ■ TYPE CONVERSION Figure 2–8. charCodeAt() is useful for encoding nonkeyboard characters. fromCharCode() and charCodeAt(), you can convert their case to lowercase or uppercase with toLowerCase() or toUpperCase(). For example, fight scenes in Batman comic books would have onomatopoeic words such as pow, bam, and zonk superimposed in uppercase.

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