For my work, I have to do a lot of concatenation of values based on specific conditions. One tool that's been invaluable has been an array formula with TEXTJOIN, e.g. {=TEXTJOIN(",",TRUE,IF(A3:A11=C4,B3:B11,""))}
I generally get results like this, with the bottom three rows being the results of the formula
1 a
1 b
2 c
2 d
3 e
3 f
1 a,b
2 c,d
3 e,f
I just got a new computer for work and the array won't work. Is there a setting in Excel I need to change?
Excel Office 365