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    Topic complex String functions
    Function scan()
    Short Counts the occurence of a sub string
    Syntax SCAN(subststr, stri : STRING) : INTEGER
    Parameter subststr, str : any string
    Return Number of the occurence of substr in str.
    See also:
    pos()
    Description Example:

    SCAN('e','Meier') = 2

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       Last changed: 21.10.2004
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