How to remove all newlines in an array without using for loop with C#

Question

I would like to remove all newlines without using for loop and then the array might changed the order. The code must go at the commented line of code below.

string[] filterInput1 = tbInput1.Text.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
//(remove all Environment.NewLine or "" code goes here).
string after_resultInput1 = "";
for (int i = 0; i < filterInput1.Length; i++)
{
    string[] getDict = filterInput1[i].Split(new char[] { Convert.ToChar(tbDelim.Text) });
    after_resultInput1 += getDict[Convert.ToInt32(tbColumn.Text)] + Environment.NewLine;
}

The array of filterInput1 after Split()

filterInput1
{string[6]}
[0]: "asdasdasd|abc"
[1]: ""
[2]: ""
[3]: "1111"
[4]: ""
[5]: ""

The result must be:

filterInput1
{string[2]}
[0]: "asdasdasd|abc"
[1]: "1111"

AlexD · Accepted Answer · 2014-09-14 12:43:47Z

7

Try StringSplitOptions.RemoveEmptyEntries:

string[] filterInput1 = tbInput1.Text.Split(
    new string[] { Environment.NewLine },
    StringSplitOptions.RemoveEmptyEntries
);

answered Sep 14, 2014 at 12:43

AlexD

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Comments

Casperah · Accepted Answer · 2014-09-14 12:51:02Z

1

Try RemoveEmptyEntries like AlexD suggested:

string[] filterInput1 = tbInput1.Text.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);

Good luck with your quest.

If you allow linq you could do something like this:

after_resultInput1 = string.Join(Environment.NewLine, 
    tbInput1.Text.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries).
    SelectMany(s => s.Split(new char[] { Convert.ToChar(tbDelim.Text) })));

Good luck.

edited Sep 14, 2014 at 12:51

answered Sep 14, 2014 at 12:45

Casperah

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4 Comments

PMay 1903 Over a year ago

Thank you for your additional comment about LINQ. Which one will run faster?

Casperah Over a year ago

This one runs faster than yours since yours uses += and my example uses string.Join which in turn uses StringBuilder. That is the theory, but in your case no one would ever notice.

PMay 1903 Over a year ago

Because of a large amount of the array, I am looking for the best solution to solve my problem above and the fastest code also. Thank you again, your code is very awesome with the additional code.

Eric Lippert Over a year ago

@PMay1903: The answer to "which one will run faster?" is always the same: get out a stopwatch, run the code both ways, and then you will know.

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