Google 表格 - 如果找到，则在另一列中搜索列值复制第二列的值

Question

I have a situation like below: Column A has some values. Column B has more values. Now I want to check if Column B contains values from Column A. If it contains then print values from Column B to Column C. Please note that all values are unique so no confusion of finding value more than once.

Column A
john.doe
alice.white

Column B
violinhi@yahoo.com.
augusto@yahoo.ca
bwcarty@att.net
dprice@msn.com
alice.white@hotmail.com
staikos@optonline.net
psharpe@mac.com
john.doe@gmail.com
andale@yahoo.com
magusnet@icloud.com

Column C(This is expected output)
john.doe@gmail.com
alice.white@hotmail.com

Answer 1

Here's one way ..

=filter(B2:B, match(regexextract(B2:B, "(.*)@"), A2:A, 0))

Or maybe

=ArrayFormula(if(len(A2:A), vlookup(A2:A, {split(B2:B, "@"), B2:B}, 3, 0),))