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Full Discussion: tcl-argv with switch & while
Top Forums Programming tcl-argv with switch & while Post 302502064 by odys on Sunday 6th of March 2011 05:52:55 PM
Old 03-06-2011
This code does not look like Tcl. It looks more like Perl to me.
Anyway, the operation shift removes first entry from array, something like:
A[1]=A[2]; A[2]=A[3]; ...
so the code indeed can iterate over whole array, since every element end up as argv[1] at some point. Sh and perl programmers often do it this way.
 

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RESET(3)								 1								  RESET(3)

reset - Set the internal pointer of an array to its first element

SYNOPSIS
mixed reset (array &$array) DESCRIPTION
reset(3) rewinds $array's internal pointer to the first element and returns the value of the first array element. PARAMETERS
o $array - The input array. RETURN VALUES
Returns the value of the first array element, or FALSE if the array is empty. EXAMPLES
Example #1 reset(3) example <?php $array = array('step one', 'step two', 'step three', 'step four'); // by default, the pointer is on the first element echo current($array) . "<br /> "; // "step one" // skip two steps next($array); next($array); echo current($array) . "<br /> "; // "step three" // reset pointer, start again on step one reset($array); echo current($array) . "<br /> "; // "step one" ?> SEE ALSO
current(3), each(3), end(3), next(3), prev(3). PHP Documentation Group RESET(3)
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