Flash CS3 Documentation

ActionScript 2.0 Language Reference > ActionScript classes > String > lastIndexOf (String.lastIndexOf method)

lastIndexOf (String.lastIndexOf method)

Searches the string from right to left and returns the index of the last occurrence of value found before startIndex within the calling string. This index is zero-based, meaning that the first character in a string is considered to be at index 0--not index 1. If value is not found, the method returns -1.

Availability: ActionScript 1.0; Flash Player 5

Parameters

value:String - The string for which to search.

startIndex:Number [optional] - An integer specifying the starting point from which to search for value.

Returns

Number - The position of the last occurrence of the specified substring or -1.

Example

The following example shows how to use lastIndexOf() to return the index of a certain character:

var searchString:String = "Lorem ipsum dolor sit amet.";
var index:Number;

index = searchString.lastIndexOf("L");
trace(index); // output: 0

index = searchString.lastIndexOf("l");
trace(index); // output: 14

index = searchString.lastIndexOf("i");
trace(index); // output: 19

index = searchString.lastIndexOf("ipsum");
trace(index); // output: 6

index = searchString.lastIndexOf("i", 18);
trace(index); // output: 6

index = searchString.lastIndexOf("z");
trace(index); // output: -1

See also

indexOf (String.indexOf method)

Flash CS3