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Returns the offset within a string where the specified substring first occurs.

Syntax

    index( string , substring )
    string.index( substring )
    index( string , substring , index )
    string.index( substring , index )

Parameters

    string the string to check.
    substring the substring to check for.
    index the starting index into the specified string.

Returns

    integer index into the string where the substring was found.
    -1, if not found.

Example

    if s.index( cmd ) then
        break
    end
    
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Last Modified: Tue Jan 26 22:19:03 EST 1999