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Function Returns Introduced Description
lastIndexOf Integer v4.0 Returns the index of the last found occurrence (if any) of a substring within another string, optionally starting at a specified offset. If the substring is not found, -1 is returned.

See Also:


Integer lastIndexOf(String original,String tofind);

Integer lastIndexOf(String original,String tofind, Integer offset);

Parameters/Return Value

Parameter Data Type Description
original String String to search in
tofind String String to find in original
offset Integer index in original string 0...(length-1)
Return Integer Index of last occurrence of tofind in original, or -1 if not found

Detailed Description

The lastIndexOf function returns the index in the original string of last occurrence of the string tofind in the original string, or -1 if the string is not found.

An optional offset may be specified, which specifies that the search in the original string begins at that specified offset. If the offset is negative, the search will begin at offset 0. If the offset is past the end of the original string, the function will always return -1.


Example Result Notes
lastIndexOf("feb","janfebmar"); 3
lastIndexOf("feb","janfebmarfeb"); 9 returns last found
lastIndexOf("feb","janfebmar",4); -1 starts searching on "ebmar"
lastIndexOf("feb","janfebmar",-1); 3 starts searching at 0
lastIndexOf("feb","janfebmar",23); -1 past end, always returns -1