c# replace negative list items with 0

Question

I have a list and I want to replace negative list items with 0.

I've tried something, but it doesn't work:

List<decimal> value =  new List<decimal>();
value .Where(x => x <0).ToList().ForEach(s => s.Value = 0);

or 

 foreach (double v in value) if (v< 0) Math.Max(0, v);

Answer 1

Try this:

List<decimal> list = new List<decimal>();
. . .
for( int i = 0; i < list.Count; ++i ) list[i] = Math.Max( 0, list[i] );

If you want to preserve the original list and create a second one, then:

List<decimal> list2 = list.Select( v => Math.Max( 0, v ) ).ToList();

Answer 2

for (int i = 0; i < value.Count; i++)
            {
                if (value[i] < 0)
                {
                    value[i] = 0;
                }
                //MessageBox.Show(value[i].ToString());
            }

Answer 3

I am not sure if using LINQ is a good idea to replace a collection but you can try this:

  List<decimal> myList = new List<decimal>();
            myList.Add(5);
            myList.Add(1);
            myList.Add(-55);
            List<decimal> output = new List<decimal>();
           myList  = output.Concat(myList.Where(x => x < 0).Select(x => x - x).ToList().Concat(myList.Where(x => x > 0)).ToList()).ToList();

The items of the myList will be 5,1, 0

Answer 4

Hi,

Please refer code below:

List<decimal> value2 = value.Select(x => (x < 0 ? 0 : x)).ToList();

Thanks 

Answer 5

Hi,

Using for loop, we can achieve this..  Please refer the below code.. 

List<decimal> decimlaList = new List<decimal> {-1, 0, 3, -1};

            for (int index = 0; index < decimlaList.Count; index++)
            {
                var value = decimlaList[index];
                if (value < 0)
                {
                    value = 0;
                }
            }

The foreach statement is used to iterate through the collection to get the information that you want, but can not be used to add or remove items from the source collection to avoid unpredictable side effects. If you need to add or remove items from the source collection, use a for loop.

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