cformat switch: H
Allows you to start with a fixed format source of data (either array or file) and customize it at runtime by making selected columns invisible. (Hidden columns are loaded into the list box just like any other data, so you would not want to over-use this technique with large data sets due to the wasted overhead.)
Note that the hidden column flag (H) overrides the Dspmin and Dwpwid options.
Conditional Hidden Column
cformat switch: HH
Acts like H but only if the column is empty (if string) or zero (if numeric).
Note that the logic supporting this is tied to the data (rather than answer) array load operation. So adding data to the answer array for a previously hidden HH column and and re-entering with XTROP_RESELECT will not cause cause the column to become visible. But adding it to the data array and re-entering with XTROP_REPLACE should reevaluate the column to determine if it should become visible.
History
2024 May, A-Shell 7.0.1759: HH function added to XTREE.
