从数组中删除空元素 [英] Removing empty elements from an array

问题描述

你好

我有



string [] myArray = new [] {1， 2，3，};



如何将myArray转换/格式化为



string [] myArray = new [] {1，2，3};



在其他作品中，我如何以编程方式删除最后一个空条目



我假设我不知道空条目的索引。



提前致谢



Martin

Hi there
I Have

string[] myArray=new []{"1","2","3",""};

How can i convert/Format myArray to Look Like

string[] myArray=new []{"1","2","3"};

In other works, how can i programmatically remove the last empty entry

I am assuming that i don't know the index of the empty entry.

Thanks in advance

Martin

推荐答案

你可以轻松简单地完成这个工作



myArray = myArray.Where（x =>！string.IsNullOrEmpty（x ）。ToArray（）;

you can do this easy ans simple way

myArray = myArray.Where(x => !string.IsNullOrEmpty(x)).ToArray();

C＃没有直接的方法，但是......你可以尝试：

C# doesn'ty have a direct way to do that, but... you could try:

string[] x = new string[] { "1", "", "2", "", "3", "4" };
List<string> y = x.ToList<string>();
y.RemoveAll(p => string.IsNullOrEmpty(p));
x = y.ToArray()

我建​​议你检查你的设计，考虑到从中删除或插入元素的固有成本/进入数组。这与创建全新阵列并制作所有数据的副本相同。性能可能会受到太大影响。使用列表作为临时对象无法解决问题。



因此，请考虑首先使用容器。您可以使用，例如 System.Collections.Generic.List<> ，请参阅 http://msdn.microsoft.com/en-us/library/system.collections.generic.aspx [ ^ ]。

-SA

I would advise you to review your design taking into account the inherent cost of removal or insertion of an element from/into the array. This is the same as creation of a brand new array and making a copy of all data. The performance can suffer too much. Using a list as a temporary object won't solve the problem.

So, consider using containers in first place. You can use, say System.Collections.Generic.List<>, please see http://msdn.microsoft.com/en-us/library/system.collections.generic.aspx[^].

—SA

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