data structures abstraction and design using java

,SETB); Console.log (Intersetionab.values ())//setiterator{2, 3}// Analog differential set operation//the same, with the intersection operation is very similar, but the condition is just the opposite of let difference = function (SETA,SETB) {Let differenceset = new Set (); for) Setb.has (x)) {differenceset.add (x);}} return Differenceset;} Let Differenceab = difference (SETA,SETB); Console.log (Differenceab.values ())//setiterator{1} When we finished writing the ES6 native set class simulat

....The following is mainly a hash table, called Hashtable or HashMap, the hash table can significantly improve the dictionary search speed, in short, it does not need to go through the key. For not a key name, it uses an algorithm to encode, the encoded value records the value of the address, well, like this picture below.　　Well, the above picture is based on the Ascⅱ code of each letter of the key name, and the actual situation is more complicated than this.Then we can do the corresponding ke

to implement, tracking the algorithm is not straightforward.Other interval sequencesThe selection interval sequence can be called a magic. Only the formula h=h*3+1 generation interval sequence is discussed here, but the application of other interval sequences has achieved varying degrees of success. There is only one absolute condition, that is, the gradually decreasing interval must be equal to one at a time, so the last order is a normal insertion sort.The efficiency of the hill sortSo far, n

Java's class library is so many that many people don't understand it, and the result is that they always build their own wheels.The following summarizes some of the data structures in Java, plus some implementations of the analysis, as well as the memo.As for the complexity of time, the personal feel that the use of writing is not very useful. If you understand h

, card): Table.append (Card)ifTable.count (Card) >=2: whileTable.count (Card) >0:person.append (Table.pop ()) whileLen (hen)!=0 andLen (haa)! =0:#print "tab:", List (table)i = Hen.popleft ()#hen the cards first#print "Hen put", IRefreshtable (hen, i)#Hen Action#print "hen:", List (hen) #print "tab:", List (table)j = Haa.popleft ()#Haa after the card#print "Haa put", JRefreshtable (Haa, J)#haa Action#print "Haa:", List (HAA)#print "tab:", List (table)#print "Next Turn"

Arrays are the most widely used data storage structures. It is implanted in most programming languages.Basic knowledge of arrays in JavaCreate an arrayThey are treated as objects in Java, so you must use the new operator to create an array:Int[] Intarray;Defines a reference to an array Ingarray = new int[100]; Creates the array, and//sets int array to refer to it

1. HashMap Overview HashMap is an asynchronous implementation of the map interface based on a hash table (Hashtable is similar to HashMap, the only difference being that the method in Hashtalbe is thread-safe, that is, synchronous). This implementation provides all the optional mapping operations and allows NULL values and NULL keys to be used. This class does not guarantee the order of mappings, especially if it does not guarantee that the order is immutable. 2. Four points of attention on Has

array, and know that the element is found. An ordered array can be found by a particular algorithm faster than without an array, and we'll talk about sorting algorithms later on.③, delete slowly, according to the value of the element is deleted, we need to find the location of the element, and then the value behind the element to move the whole forward one position. It also takes a lot more time.④, arrays once created, the size is fixed, you cannot dynamically expand the number of elements of t

. The algorithm is then filtered up.Note: Up and down, filtering up is only compared with a parent node and stops filtering when it is smaller than the parent node.　　5. Complete Java Heap CodeFirst we need to know some of the main points of using arrays to represent heaps. If the index of the node in the array is x, then:The left child node of the node is 2*index+1,The right child node of the node is 2*inde

. You only need to change the reference point. Another important aspect is that the array size is fixed when defined, but the linked list can allocate any size or even all available memory. ABSTRACT Data Type ADT, in short, is a way to consider the data structure: focus on what it does, and ignore how it does it. Both stack and queue are examples of ADT. They can be implemented not only

, and we'll talk about sorting algorithms later on.③, delete slowly, according to the value of the element is deleted, we need to find the location of the element, and then the value behind the element to move the whole forward one position. It also takes a lot more time.④, arrays once created, the size is fixed, you cannot dynamically expand the number of elements of the array. If you initialize to a very large array size, it will be wasted memory space, if it is small, the number of subsequent

mapping of key-value pairs, the relationship belongs to the inner object in the collection, which has direct access to the elements in the collection. In practical applications I think more of the nesting of maps.The tool class (collections, Arrays) Collections Collection Tool class is an operation combined with a specialized tool class which is defined by a static method, A variety of sorting binary lookups for the list collection (analogy string operations) can also turn threads unsafe into t

From here, we will be explaining the Java data structure, is it ready? Let ' s go~~The data structure model in Java can be divided into several parts:1. Linear structure2. Tree-shaped structure3. Graphic or mesh structureIn the next few chapters, we will explain these data

right) {//Why J plus a 1, and I do not add 1 because the following loop is judged to start with--j and ++i.// The base element is selected Array[left], that is, the first element, so Zoo starts from the second element to compare int i = left;int J = Right+1;int pivot = array[left];//pivot for the selected datum element (head element) int Si Ze = right-left + 1;if (size >= 3) {pivot = medianOf3 (array, left, right);//array range is greater than 3, the datum element selects an intermediate value.

this time we go on to look at the Java data structure vectors (vector) Stack (stack). The first is the vector, vectors (vector) classes are very similar to the traditional array, but the size of the vector can be changed dynamically according to the need. As arrays, the elements of a vector object can also be accessed through an index. The main advantage of using