'''string last''' ''string1 string2 ?lastIndex?''

Search ''string2'' for a sequence of characters that exactly match the characters in ''string1''. If found, return the index of the first character in the last such match within ''string2''. If there is no match, then return '''-1'''. If ''lastIndex'' is specified (in any of the forms accepted by the '''index''' method), then only the characters in ''string2'' at or before the specified ''lastIndex'' will be considered by the search. For example,

   string last a 0a23456789abcdef 15

will return '''10''', but

   string last a 0a23456789abcdef 9

will return '''1'''.

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See also:

   * [string]
   * [string first]
   * [string index]

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