[R] Column mapping

[jd6688]

DF1
name	OTHER	
ABC	 O
KKK	 O
QQQ	 O
DDD	 O
PPP	 O

DF2
name
ABC
KKK
DDD

If the names in df1 mapped the names in df2, then add the mapped name to df1
as a separate column, for instance "mappedColumn"

how to implement this? Thanks


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