140826 ● set

Set

The difference between a set and an array: a set can be discontinuous and multiple data types.

 

Value, address, and address of the next element

 

. Count count the number of elements in the Set

. Add () add element

. Addrange () adds a group of elements (such as an array)

. Remove () Remove the value in the first ()

. Removeat () removes an element according to the subscript in ().

. Insert (0th) insert an element at the position

. Insertrange (,) inserts a group of elements in position X.

. Clear () Clear the set

Position of the first occurrence of an element in. indexof () (-1 if no element exists)

Position of the last element in. lastindexof ()

Elements in the. Sort set are sorted in ascending order.

. Reverse () inversion

 

Int [] A = new int [5] {1, 2, 3, 4, 5 };

Foreach (INT n in a) // generally, foreach is used to traverse arrays and sets, which is efficient.

{

Console. writeline (N );

}

 

System. Threading. thread. Sleep (1000); // you can put it in the for statement to slow down the loop and reduce it by 1000 milliseconds.

 

 

Stack (Advanced and later)

Stack S = new stack ();

. Push () Push Value

. Pop-up value

. Clear () Clear

 

Team (first-in-first-out)

Queue q = new Queue ();

. Enqueue () into the value

. Dequeue () to retrieve the value

. Clear () Clear

 

 

Garbage collection:

The system enables garbage collection: 1. idle time and garbage collection; 2. When the memory usage is full, garbage collection is enabled.

Arraylist

 

140826 ● set