June 12, 2000 - WMLScript Libraries

June 12, 2000 WMLScript Libraries Tips: June 2000 Yehuda Shiran, Ph.D. Doc JavaScript

The Lang library contains a set of functions that are closely related to the WMLScript language core. They are: abs(), min(), max(), parseInt(), parseFloat(), isInt(), isFloat(), maxInt(), minInt(), float(), exit(), abort(), random(), seed(), and characterSet().

The Float library contains a set of frequently-used arithmetic floating-point functions. They are: int(), floor(), ceil(), pow(), round(), sqrt(), maxFloat(), and minFloat().

The String library contains a set of string functions. A string is an array of characters. Each of the characters has an index, starting at 0. Notice that WMLScript does not feature the JavaScript's Array object. The String functions are: length(), isEmpty(), charAt(), subString(), find(), replace(), elements(), elementAt(), removeAt(), replaceAt(), insertAt(), squeeze(), trim(), compare(), toString(), and format(). Notice the wealth of functions that mimic array operations in JavaScript.

The URL library contains a set of functions for handling both absolute and relative URLs. The functions are: isValid(), getScheme(), getHost(), getPort(), getPath(), getParameters(), getQuery(), getFragment(), getBase(), getReferer(), resolve(), escapeString(), unescapeString(), loadString().

The WMLBrowser library contains functions by which WMLScript can access variables in the WML deck that called the WMLScript script. The Mortgage example shown later in this column includes a few calls to functions from this library. The functions are: getVar(), setVar(), go(), prev(), newContext(), getCurrentCard(), and refresh().

The Dialogs library contains a set of typical user interface functions. They are: prompt(), confirm(), and alert().

The following table shows four example functions from two of the above WMLScript libraries:

For more on WMLScript Libraries, go to WMLScript Standard Libraries.