JavaScript Examples Bible - UserWorks Technologies

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JavaScript Examples Bible: The Essential Companion to JavaScript Bible
Examples Highlights
✦ Study the code and operation of Listing 34-2 to see how to use JavaScript to
convert characters to character codes and vice versa. Converting ASCII or
Unicode numeric values to their corresponding characters requires the
String.fromCharCode() method of the static String object.
✦ Compare the sequence of steps for the string.indexOf() and
string.lastIndexOf() methods to grasp fully the behavior of each and the
differences between them.
✦ Listing 34-4 lets you experiment with the string.replace() and
string.search() methods, both of which utilize regular expression powers
available in JavaScript 1.2 of NN4+ and IE4+. Notice how the script functions
assemble the regular expression objects with global modifiers.
✦ Walk through the steps of the string.split() method example to convert a
string to an array.
✦ Compare the behaviors and coding of Listings 34-6 and 34-7 to distinguish the
subtle differences between the string.substr() and string.substring()
methods.
✦ Study the example for string.toLowerCase() and string.toUpperCase()
to see how to remove case sensitivity issues for some operations.
✦ Convert a long floating-point number to a dollars-and-cents string by following
the steps for the number.toFixed() method.
String Object
Properties
constructor
stringObject.constructor
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Compatibility ✓ ✓ ✓ ✓ ✓
Example
Use The Evaluator (Chapter 13 in the JavaScript Bible) to test the value of the
constructor property. Enter the following statements into the top text box:
a = new String(“abcd”)
a.constructor == String
a.constructor == Number