Best method name for name exist check [closed]

Question

There is a method that checks if a name already exists :

bool Foo(string name) {
  return Names.Contains(name)
}

What would be the best name for this method?

Answer 1

It depends on what Names is, where it's populated, and so on.

Possibilities include IsExistingName(), NameAlreadyExists(), IsPreviouslyProcessedName(), and so on. Basically, anything which makes sense after the word "if" (after filling in prepositions) is a good function name.

• "If [it] is [an] existing name..." -> IsExistingName()
• "If [the] name already exists..." -> NameAlreadyExists()
• "If [it] is [a] previously processed name..." -> IsPreviouslyProcessedName()

Answer 2

I'd consider isNameExist(string name).