Remove item from object Array

Question

I wanted to remove one item from existing object array and generate a separate object array without making the removed item as null in the new object array,

Array:

DataSet = new[]
                {
                    new DataSet
                    {
                        Item_1 = "value1",
                        Item_2 = "value2",

                    },
                    new DataSet
                    {
                        Item_1 = "value3",
                        Item_2 = "value4",

                    }
              }

Expected result:

"DataSet": [
    {
      "Item_1": "value3",
      "Item_2": "value4",

    }
  ]

Following code is working as expected:

var tempListDataSet = _response.DataSet.ToList();
    tempListDataSet.Remove(_response.DataSet[0]);
    response.DataSet = tempListDataSet.ToArray();

Just curious whether there is a better way of doing this?

Define "better". Would `tempListDataSet.RemoveAt(0)` be "better"? — D Stanley, Oct 02 '19 at 00:16
@DStanley what is meant was more efficient way having less code — SMPH, Oct 02 '19 at 00:28

Nan Yu · Accepted Answer · 2019-10-02T13:08:54.570

1

If you want to skip the first one , you can use :

var result = _response.DataSet.Skip(1).ToArray();

Thought this will still create a new array and copy elements since arrays have a fixed size. Thread here is for your reference .

If you want to remove specific element , you could use linq :

var result = _response.DataSet.Where((source, index) => index != 1).ToArray();

edited Oct 02 '19 at 13:08

answered Oct 02 '19 at 01:32

Nan Yu

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In case if I want to remove ONLY the second item in the array. Does this work? – SMPH Oct 02 '19 at 06:24
If you want to remove the second item , not the first one ,first two.. you should use removeAt , can't use skip . – Nan Yu Oct 02 '19 at 06:26
But looks like this is not acceptable `_response.DataSet.ToList().RemoveAt(1).ToArray(); ` – SMPH Oct 02 '19 at 06:58
1

@SMPH : var result = _response.DataSet.Where((source, index) => index != 1).ToArray(); – Nan Yu Oct 02 '19 at 07:05
@SMPH . Sure . Updated . – Nan Yu Oct 02 '19 at 13:09

Remove item from object Array

1 Answers1