How Do I Rearrange A List

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i have a list as follows
{dog,dog,cat,cat,mouse,mouse,cat,cat}
i want to remove the repeating values as well as rearrange the list in the order
{dog,mouse,cat} since cat gets added to the list in the end
How do i do it?

Posted 30-Sep-15 19:34pm

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DamithSL · Accepted Answer · 2015-09-30T19:49:00

C#

mylist = mylist.Distinct().ToList();

will remove duplicates and assign back to your list
if you need to keep the item based on last insert index, then

C#

List<string> list = new List<string>{"dog","dog","cat","cat","mouse","mouse","cat","cat"};
list = list.Select((x,index)=> new {Val=x, Index=index}).GroupBy(y=>y.Val)
        .Select(g=>new {g.Key, maxin= g.Max(x=>x.Index)}).OrderBy(x=>x.maxin).Select(x=>x.Key).ToList();