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Joining elements of an array into a string with delimiter with slicing

To mimic this python code:

viewPath = 'This/That/Other/Here'
parts = viewPath.split('/')
result = '/'.join(parts[:2])

Use this:

groupConcat(
	where(
		foreach(split({view.custom.currentPrimaryView}, '/'), it()[0]),
		idx() < 2
	),
'/')

@pturmel thanks for the hint, I've never used that native function before!

You can further simplify, BTW, since where() and groupConcat() can both take datasets. Eliminating the forEach().