JuniorTheoryCommon

What does the program print (lines separated by spaces)?

var nums = new List<int>();
Console.WriteLine(nums.Capacity);
for (int i = 0; i < 5; i++)
{
    nums.Add(i);
}
Console.WriteLine(nums.Count);
Console.WriteLine(nums.Capacity);

0 5 8

Expecting Capacity to equal Count: a list keeps spare places and doubles its array when it is full, so after 5 elements it has 8 places.
Expecting a new list to start with 4 places: new List<int>() has none, and the first Add creates an array of 4.

What do Count and Capacity print after one more line, nums.RemoveAt(0);?
How does the output change if the list is created as new List<int>(10), and why?

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JuniorTheoryCommon

What does the program print (lines separated by spaces)?

var nums = new List<int>();
Console.WriteLine(nums.Capacity);
for (int i = 0; i < 5; i++)
{
    nums.Add(i);
}
Console.WriteLine(nums.Count);
Console.WriteLine(nums.Capacity);

0 5 8

Expecting Capacity to equal Count: a list keeps spare places and doubles its array when it is full, so after 5 elements it has 8 places.
Expecting a new list to start with 4 places: new List<int>() has none, and the first Add creates an array of 4.

What do Count and Capacity print after one more line, nums.RemoveAt(0);?
How does the output change if the list is created as new List<int>(10), and why?

Back to questions Open topic in roadmap →Answer it yourself — Quiz