C # operations on multiple sets and arrays (merge, deduplicate, and Judge)

In the development process, array and set processing are the most worrying. for or foreach is generally used to process some operations. Here we will introduce some common set and array operation functions.

First, we will give an example of two sets, A and B.

List <int> listA = new List <int> {1, 2, 3, 5, 7, 9 };

List <int> listB = new List <int> {13, 4, 17,29, 2 };

 

ListA. addRange (listB); sets. B merge List <int> Result = listA. union (listB ). toList <int> (); // remove duplicate items List <int> Result = listA. concat (listB ). toList <int> (); // retained duplicate items

ListA. BinarySearch ("1"); // determines whether a value is included in the set. If yes, 0 is returned.

 

In the example of two Arrays

Int [] I = new int [] {1, 2}; int [] j = new int [] {2, 3}; List <int> r = new List <int> ();

R. AddRange (I );

R. AddRange (j );

Int [] c = r. ToArray (); merge Arrays

Int [] x = I. Union (j). ToArray <int> (); // remove duplicate items

Int [] x = I. Concat (j). ToArray <int> (); // retained duplicate items

Int n = Array. BinarySearch (I, 3); // determines whether the Array contains a value. If it contains, 0 is returned.