C# 计算字符串中的项目数

Question

Can some one pls tell me what this line of code is(c#):

I am trying to count spaces in the string that's how came across this code line. I understand the conversion to char array part,but the arguments part I don't understand how is it done what is x and the equal to greater then signs

var count = user_input.ToCharArray().Count(x => x == ' ');

and also if there's any easier method to count then pls broaden my horizon.

Answer 1

This makes the string into single characters and counts all single characters ( x ) that are spaces.

It is somewhat equivalent to:

    int count = 0;
    foreach(var c in user_input)
        if (c == ' ')
            count += 1;

    Console.WriteLine(count);

You could also split the string at spaces - the resulting array is 1 longer then the amount of spaces:

var user_input = "This is a test with      some spaces inside"; 
    
Console.WriteLine(user_input.Split(new char[]{' '}).Length - 1);

Output:

12

This method is not as good as it creates an array without need to - counting the spaces is the way to go.

See C# Lambda ( => )