View Problem
From a List Produce a List of Duplicate Entries
Taking a list:
Write the code to produce a list of duplicates in the list:
java
csharp
Submit a new solution for java or csharp
There are 19 other solutions in additional languages (clojure, cpp, erlang, fantom ...)
["andrew", "bob", "chris", "bob"]
Write the code to produce a list of duplicates in the list:
["bob"]
List listOfDuplicates = new ArrayList(Arrays.asList(new String[]{"andrew", "bob", "chris", "bob"}));
Set set = new HashSet(listOfDuplicates);
for (Object element : set)
listOfDuplicates.remove(element);
Set set = new HashSet(listOfDuplicates);
for (Object element : set)
listOfDuplicates.remove(element);
List<String> values = new List<string> {"andrew", "bob", "chris", "bob"};
var duplicates = values
.GroupBy(i => i)
.Where(j => j.Count() > 1)
.Select(s => s.Key);
foreach (var duplicate in duplicates)
{
Console.WriteLine(duplicate);
}
var duplicates = values
.GroupBy(i => i)
.Where(j => j.Count() > 1)
.Select(s => s.Key);
foreach (var duplicate in duplicates)
{
Console.WriteLine(duplicate);
}
Submit a new solution for java or csharp
There are 19 other solutions in additional languages (clojure, cpp, erlang, fantom ...)
