ldc collections

One, there are three ways to delete a site collection:1. Open the SharePoint 2013 Admin page First---> Click on ' Application Management (Application Management) ' and go to this page---> click ' Delete a site collection Collection) ' and open the page---> select the site collection you want to delete and click the ' Delete ' button in the lower-right corner---> complete the deletion.2. Open the top site of the site collection you want to delete---> click the Gear button in the top right corner

1, can be indeterminate length, according to the actual need to add elements, can save space, and better solve the real problem. Arrays are fixed-length when initialized, and cannot be changed.2. The collection can add elements of any type, and the array must be of the same type.3, the collection can be achieved by the equals and Comparto methods to customize the comparison criteria of elements, to achieve any type of element comparison.4, the collection also has a lot of features, can solve mor

Set Relationship test:List_1=[1,4,5,7,3,6,7,9]list_1=set (list_1) #去重list_2 =set ([2,6,0,66,22,8]) print (List_1,type (list_1)) #集合是无序的print (list_1,list_2) Print (List_1.intersection (list_2)) #交集print (List_1 list_2) #交集print (List_1.union (list_2)) # and set print (List_1 | list_2) #并集 # difference in list_1 and not in List_2print (List_1.difference (list_2)) print (List_2.difference (list _1)) print (list_1-list_2) #判断是否子集print (List_1.issubset (list_2)) #判断是否父集print (List_1.issuperset (lis

choose the best data structure.Several data structures that are simple to understand: Arrays: The ability to query and replace quickly, but for larger arrays (changing the index of elements, and possibly generating expansion) and deleting (possibly altering the index of elements) can degrade performance; Linked list (LinkedList): A list element in a single necklace table contains: A saved content, a node pointing to the next list element;There is a node in the doubly linked li

Collection: Define a collection, set Stone a class, in the System.Collections library, you need an indexArrayList al = new ArrayList (); The collection is indexed as an array, and the index starts at 0 and adds the meaning of an int value.int i= al. Add (3);//print out an int value returned by index 0, which is the index of the added data in the collectionint a= al. ADD (5);int b= al. ADD (7);Al. Insert (1,9);//Inserts an index of 1 inserts a 9 at 1 on this index, insert data 9. The data of the

Sometimes, we need to export data from one system and import it into another system, and this data is very large, and the data import is restricted and cannot be implemented, then we need to do the dataListslicing, and then exporting, finally, the implementation of data import. for the segmented processing of data, we can use the Sublist method to implement, the specific usage can be see the following cases:Import java.util.ArrayList;Import java.util.List;public class Listtest {public static voi

Counter is a special kind of dictionary, which is mainly convenient for counting, the key is to count the number of Item,value saved. From collections import Counter >>> c = Counter (' Hello,world ') Counter ({' L ': 3, ' O ': 2, ' E ': 1, ' d ': 1, ' H ': 1, ', ': 1, ' R ': 1, ' W ': 1} Initialization can pass in three types of parameters: dictionaries, other iterable data types, and named parameter pairs. | __init__ (self, I

Collection Collection is the interface of Set List queue and Deque Queue: Advanced First Out queue Deque: Two-way linked list Note: There is no relationship between collection and map Collection is a set of objects, and Map is a key value pair. Collections is a class, a container's tool class, just as arrays is an array of tool classes Reverse Reverse the data in the list to flip Package collection; Import java.util.ArrayList; Import java.

Each group of queries can get its result set, if the need to combine multiple query results into a result set, can be implemented by the set operation. such as union, and set, and do not remove duplicate rows (unoin all), intersections (INTERSECT), Difference sets (minus). The purpose of the collection command is to merge the results of two (including above) SQL statements. Because you need to set up two (or more) data collections and Therefore, the

The collection is like an array for storing things. Commonly used collections are divided into List (Ordered emissions), MAP (with the name and value of one by one corresponding storage), Set (neither unordered nor name) Of these three, the list and set are sub-interfaces of the collection interface, and the map is not a sub-interface of the collection interface The first is to introduce the collection First, List: To learn the list, here are the

, CreateIndex]}, {resource: {db: "Mytargetdb" , collection: "System.js"}, Actions: ["Insert"]}, {resource: {db: "Mytargetdb", Collection: "System.users"}, AC tions: [insert]}, {resource: {db: ' Mytargetdb ', collection: ' System.roles '}, actions: [' Insert ']}, {re Source: {db: "Mytargetdb", Collection: "System.version"}, Actions: [insert]} Certification:If a remote host requires security authentication, it needs to be authenticated using username,nonce and key.Nonce is a one-time passwor

than all "salesman"Analysis: There are all keywords, using the all comparison operatorSQL statement: Select empno,ename,sal from emp where Sal > All (SELECT sal from emp where job = ' salesman ');Example: Query the Employee information in department 20, same as 10 employees in departmentAnalysis: There is a range of keywords in what, with in comparison operatorSQL statement: SELECT * from emp where job in (the SELECT job from emp where Deptno = ten) and deptno = 20;(3) Multi-column sub-queryIf

Data structures is a basic element in programming. Almost every program uses one or more types of data structures to store and manage their data. Java API provides the Java collections framework that contains interfaces, classes, and algorithms, which implement a lot of different data structures that's can use in your programs.When you need to work with data collections in a concurrent program, you must is

and does not implement the comparable interface, you can use comparator to implement comparison algorithms for sorting.2. Prepare for using different sorting criteria, such as ascending, descending, or otherwise First, you must know two classes: Java. util. arrays and Java. util. collections (note the difference with collection) collection is the top-level interface of the Collection framework, while collections