ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
Chapter 18. ActionScript Language Reference
String.concat( ) Method
Flash 5
combine one or more values into a single string
string.concat(value1, value2,...valuen)
Arguments
value1,...valuen
Values to be converted to strings (if necessary) and concatenated with string.
Returns
The result of concatenating string with value1, value2, ...valuen.
Description
The concat( ) method creates a string from a series of values. It is equivalent to using the concatenation operator (+) with strings but is sometimes preferred for clarity, as the + operator can also be used to add numbers. For details on concat( ), see Chapter 4.
Usage
Note that concat( ) does not modify string; it returns a completely new string.
Example
var greeting = "Hello"; excitedGreeting = greeting.concat("!"); trace(greeting); // Displays: "Hello" trace(excitedGreeting); // Displays: "Hello!" var x = 4; // Initialize x as an integer trace(x + 5); // Displays: 9 trace(x.concat(5)); // Fails because x is not a string trace(String(x).concat(5)); // Displays: "45" var x = "4"; // Initialize x as a string trace(x.concat(5)); // Displays: "45" trace(concat("foo", "fee")); // Fails because concat( ) must be // invoked as a method of a string
