在指定索引处开始的数组中查找空字符串

Question

I want to check if an empty string exists in an array after a specified index.

Suppose I have this array:

string[] values = {"1", "2", "2", "4", "", "", ""};

I want to check if an empty value exists from index 3 (where the value is 4). I want to do this without splitting it inter two different arrays of strings.

More specifically my example using an array named files

string[] files;

I want to check from array index 8 to array index 28 if there are any empty values.

Answer 1

您可以使用LINQ来做到这一点：

files.Skip(index).Any(s => s == string.Empty);

Answer 2

You can just use a for loop. Try this:

for(int i = specifiedIndex; i < array.Length; i++)
{
    if(array[i].Equals(""))
        return true;
}
return false;

This will return true if any of the values at or after the index are empty. If it reaches the end without finding one, it returns false.

You can adjust this to fit your needs. You don't necessarily have to loop the the end of the array, you can set the end condition to a specified index too, say if you wanted to check for an empty string between indexes 5 and 10 but don't care if there are any before or after that.

Answer 3

Use LINQ:-

string[] Values = { "1", "2", "2", "4", "", "", "" };
            int specifiedIndex = 3;
            var query1 = Values.Skip(specifiedIndex).Select((v, index) => new { v, index }).Where(x => x.v == String.Empty).Select(z => z.index + specifiedIndex);

            foreach (var val in query1)
            {
                Console.WriteLine(val);
            }