Iterating Hashsets

问题

Good morning guys

I have a hashset which has different objects

Object has attributes

GroupName MachineName EmailAddress

Now from the HashSet I have to find the Object which has same MachineName and EmailAddress but different Group and add into an arraylist.

thanks

回答1:

A big assumption is that you are using Java:

Set<YourObject> yourHashSet = // 
List<YourObject> result = new ArrayList<YourObject>();
for( YourObject o: yourHashSet ){
    if( o.getMachineName().equals("machine1") && o.getEmailAddress().equals("one@example.com")){
        result.add(o);
    }
}

// result will contain a list of matching objects.

It's pretty much the same code in any language, but if you are in C# you can use LINQ-Objects to do the something in a nice single statement.

来源：https://stackoverflow.com/questions/6212325/iterating-hashsets