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!! +exec+ +var+ +string+
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$lst_tit positionof$lst_titend$type_both
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  $lst_alias position, positions<br>
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  $(lst_syntax)positionof [$(emph)type$emphend] $emph s $emphend in $emph
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  string$emphend</tt> <br>
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  $lst_mean Reports the positions of the object $emph s $emphend in
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  $emph string$emphend. <br>
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  $emph type$emphend can be <tt>char</tt>, <tt>word</tt>, <tt>item</tt> or
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  <tt>line</tt>. If it is specified, then the comparison only takes place for
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  corresponding objects of $emph string$emphend which are identical to
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  $emph s$emphend. <br>
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  The output of the command is a list of positions (char, word, item or
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  line, according to the value of $emph type$emphend) where $emph s$emphend
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  is found in $emph string$emphend. <br>
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  If $emph type$emphend is missing, then $emph s$emphend is searched in
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  $emph string $emphend as a substring, and the positions reported are
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  character positions.
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