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Homework and Emergencies Homework & Coursework Questions Display usernames and their UIDs Post 303018041 by MadeInGermany on Sunday 27th of May 2018 05:41:11 PM
Old 05-27-2018
From the given relevant commands I think the teacher or the course makers want to just cut one item from the passwd, process it in a for-do-done loop, and in the loop grep the item in the passwd again in order to get the second item.
But this is less efficient compared to piping the pair of items to awk or a while read loop.
The latter can directly split into variables if the field separator IFS is set accordingly. You do not even need to run cut before.
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XmListReplaceItemsPos(3X)												 XmListReplaceItemsPos(3X)

NAME
XmListReplaceItemsPos - A List function that replaces the specified elements in the list SYNOPSIS
#include <Xm/List.h> void XmListReplaceItemsPos (widget, new_items, item_count, position) Widget widget; XmString *new_items; int item_count; int position; DESCRIPTION
XmListReplaceItemsPos replaces the specified number of items of the List with new items, starting at the specified position in the List. When the items are inserted into the list, they are compared with the current XmNselectedItems list. If any of the new items matches an item on the selected list, it appears selected. Specifies the ID of the List widget. Specifies the replacement items. Specifies the num- ber of items in new_items and the number of items in the list to replace. This number must be non-negative. Specifies the position of the first item in the list to be replaced. A value of 1 indicates that the first item replaced is the first item in the list; a value of 2 indicates that it is the second item; and so on. Beginning with the item specified in position, item_count items in the list are replaced with the corresponding elements from new_items. That is, the item at position is replaced with the first element of new_items; the item after position is replaced with the second element of new_items; and so on, until item_count is reached. For a complete definition of List and its associated resources, see XmList(3X). SEE ALSO
XmList(3X) XmListReplaceItemsPos(3X)
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