User Guide

String 1131

indexOf (String.indexOf method)

public indexOf(value:String, [startIndex:Number]) : Number

Searches the string and returns the position of the first occurrence of value found at or after

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 - A string; the substring to search for.

startIndex:Number [optional] - An integer specifying the starting index of the search.

Returns

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

Example

The following examples use

indexOf() to return the index of characters and substrings:

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

var index:Number;

index = searchString.indexOf("L");

trace(index); // output: 0

index = searchString.indexOf("l");

trace(index); // output: 14

index = searchString.indexOf("i");

trace(index); // output: 6

index = searchString.indexOf("ipsum");

trace(index); // output: 6

index = searchString.indexOf("i", 7);

trace(index); // output: 19

index = searchString.indexOf("z");

trace(index); // output: -1