CODEWITHSUNDEEP
c#listlinqinitializationstdvector
Chen Chen
Chen Chen

Reputation: 358

Comparison of List in C# and vector in C++ in terms of initialization

In C++, one can initialize a vector as

vector<int> nums1 (100, 4); // 100 integers with value 4

In additions, there is something like

vector<int> nums2 (nums1.begin() + 5, nums1.end() - 20);

Is there something similar in C# for List?

Upvotes: 0

Views: 791

Answers (2)

MakePeaceGreatAgain
MakePeaceGreatAgain

Reputation: 37095

First one goes this:

var result = Enumerable.Repeat(4, 100);

Second one (I´m not familiar with C++) would be this ( I suppose it means something like take elements from the fith until the 20th from the end):

var result2 = result.Skip(5).Take(75);

Be aware that both result and result2 are just iterators and thus are lazily evaluated. Calling ToList or ToArray will actually materialize the collection by executing the query.

Upvotes: 0

Vivek Nuna
Vivek Nuna

Reputation: 1

You can do this like this by List.

using System.Collections.Generic;
List<int> nums1 = new List<int>(Enumerable.Repeat(4,100)); //100 elements each with value 4
List<int> nums2 = new List<int>(nums1.Skip(5).Take(75)); // skip first 5 and take 75 elements

Upvotes: 1

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