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All Objects
String Object
String.charAt
String.lastIndexOf
METHOD: String::indexOf
object.
indexOf
(searchValue,[fromIndex])
When called from a
String
object, this method returns the index of the first occurance of the specified
searchValue
argument, starting from the specified
fromIndex
argument. If the searchValue is not found, a value of -1 is returned. Characters in the string are indexed from left to right with the first character indexed as
0
and the last as
String.length-1
. Note that this method is case sensitive as shown in the example below.
The following code uses the
indexOf
method to find the index values of three different character strings within the
myString
object. Note that the third example returns
-1
because the case of one of the characters does not match.
Code:
myString = new String("DevGuru.com")
document.writeln(myString.indexOf("Guru"))
document.writeln("<br>" + myString.indexOf("com"))
document.writeln("<br>" + myString.indexOf("Com"))
Output:
3
8
-1
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