JavaScript Cookbook

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JavaScript Cookbook

Programming the Web

Book Description
Why reinvent the wheel every time you run into a problem with JavaScript? This cookbook is chock-full of code recipes that address common programming tasks, as well as techniques for building web apps that work in any browser. Just copy and paste the code samples into your project - you'll get the job done faster and learn more aboutJavaScript in the process.

You'll also learn how to take advantage of the latest features in ECMAScript 5 and HTML5, including the new cross-domain widget communication technique, HTML5's video and audio elements, and the drawing canvas. You'll find recipes for using these features with JavaScript to build high-quality application interfaces.
Book Details

• Publisher:        O'Reilly Media
• By:       Shelley Powers
• ISBN:        978-0-596-80613-2
• Year:        2010
• Pages:        560
• Language:        English
• File size:        12.58 MB
• File format:        PDF
• Download:     

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关键词：Javascript Cookbook script scrip Cook techniques advantage building features browser

1. Inserting Special Characters
   
2. Problem
   
3. You want to insert a special character, such as a line feed, into a string.
   
4. Solution
   
5. Use one of the escape sequences in the string. For instance, to include the copyright symbol in a block of text to be added to the page (shown in Figure 1-1), use the escape sequence \u00A9:
   
6. var resultString = "<p>This page \u00A9 Shelley Powers </p>";
   
7. 
   
8. // print out to page
   
9. var blk = document.getElementById("result");
   
10. blk.innerHTML = resultString;

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1. Replacing Patterns with New Strings
   
2. Problem
   
3. You want to replace all matched substrings with a new substring.
   
4. Solution
   
5. Use the String’s replace() method, with a regular expression:
   
6. var searchString = "Now is the time, this is the tame";
   
7. var re = /t\w{2}e/g;
   
8. var replacement = searchString.replace(re, "place");
   
9. console.log(replacement); // Now is the place, this is the place

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1. Finding and Highlighting All Instances of a Pattern
   
2. Problem
   
3. You want to find all instances of a pattern within a string.
   
4. Solution
   
5. Use the RegExp exec method and the global flag (g) in a loop to locate all instances of a pattern, such as any word that begins with t and ends with e, with any number of characters in between:
   
6. var searchString = "Now is the time and this is the time and that is the time";
   
7. var pattern = /t\w*e/g;
   
8. var matchArray;
   
9. 
   
10. var str = "";
    
11. 
    
12. // check for pattern with regexp exec, if not null, process
    
13. while((matchArray = pattern.exec(searchString)) != null) {
    
14.   str+="at " + matchArray.index + " we found " + matchArray[0] + "\n";
    
15. }
    
16. console.log(str);

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By: Jerry Bradenbaugh

Publisher: O'Reilly Media, Inc.

Pub. Date: October 11, 1999

Print ISBN-13: 978-1-56592-577-9

Pages in Print Edition: 48 ...2015-10-16 10:04 - ReneeBK - Forum