golang csv如果匹配列值则删除重复项

Question

New to Golang and struggling to figure out how to remove duplicates in CSVs if a particular column value matches another rows.

My table has 3 columns name | band | year

If a persons name appears twices or more I just want them to output them the once.

I have only been able to output all the details in a for loop so I am guessing I need to push to a new array and compare from that?

Answer 1

to add to @Kul's answer:

// i'm pretty sure struct{} is smaller in memory than bool:
known := make(map[string]struct{})
for name, band, year, err := parseMyLine(); err == nil; {
  _, ok := known[name]
  if !ok {
    known[name]=struct{}{}
    handleFirstSeenName(name, band, year)
  }
}