How to iterate list and apply logic after two item

Joined:	29/01/2008
Level:	Gold
Points:	1853

Hi experts,

I want to iterate IList which can have any number of items and i want my result like below:

Item Number --> logic
1,2 --> Logic A
3,4 --> Logic B
5,6 --> Logic A
7,8 --> Logic B
9,10 --> Logic A

here i want to change logic after every two item and apply logic A & B. Is there any way i can do this

Joined:	14/04/2016
Level:	Silver
Points:	118

Points:	4

Hi Arun,

You can iterate throgh list using foreach loop or linq.But foreach takes more time to excecute if you have large list.So I would suggest you to go with linq.

Here the idea is to first group the elements by indexes. Dividing by 2 has the effect of grouping them into groups of 2. Then convert each group to a list and the IEnumerable of List to a List of Lists

public static IList<IList<T>> Split<T>(IList<T> source)
{
return source
.Select((x, i) => new { Index = i, Value = x })
.GroupBy(x => x.Index / 2)
.Select(x => x.Select(v => v.Value).ToList())
.ToList();
}

Then apply your logic on this sub list

Hope it helps!

Thanks,
Bharati

How to iterate list and apply logic after two item

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