User Guide

String.indexOf() 799

String.indexOf()

Availability

Flash Player 5.

Usage

my_str.indexOf(substring:String, [startIndex:Number])

Parameters

substring

A string; the substring to be searched for within my_str.

startIndex A number; an optional integer specifying the starting point in my_str to search for

the substring.

Returns

A number; the position of the first occurrence of the specified substring or -1.

Description

Method; searches the string and returns the position of the first occurrence of substring

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

substring is not found,

the method returns -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