Hi, with special bow to Bob and Frank :)
I re-clarify my previous post:

Task at hand is to hide a dozen columns i a "Main" sheet. - it has many more
of them.
I listed headings of interesting columns, stored them in 1 column vertical
list and named it "Elements" (stored on separate sheet)
I need effcient metod of parsing header row of the sheet and change column
width to 0 of those that match "Elements"
I think I saw a 1-liner or so for the task. I used to do full 2 range
looping - but it's 21st century, so I figure I gotta move ahead... :)

TIA
Paul