delphi collections

1. counter (counter)Counter is a supplement to the dictionary type that is used to track the number of occurrences of a value.We select some of the relatively common methods for example:As we can see in the above example, the Counter method returns a dictionary that counts all the characters that appear in the string. Here we introduce the Update method, the Update method is to add the results of two statistics, and the dictionary update slightly different.2. Ordered dictionary (ordereddict):Ord

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Public Staticobject[] List2array (ListObject>Olist) {object[] Oarray=Olist.toarray (Newobject[] {});//TODO needs to write another method when it is used, and does not support the array of Generics.Returnoarray;}Public Staticobject[] Set2array (SetObject>Oset) {object[] Oarray=Oset.toarray (Newobject[] {});//TODO needs to write another method when it is used, and does not support the array of Generic

Deep learning articles and code collections for text categorizationOriginal: franklearningmachine Machine Learning blog 4 days ago [1] convolutional neural Networks for sentence classificationYoon KimNew York UniversityEMNLP 2014http://www.aclweb.org/anthology/D14-1181This article mainly uses CNN to classify sentences based on pre-trained word vectors. The authors find that using fine-tuning to learn task-related word vectors can enhance the model e

Memo: ASP. NET platform thread safe Collection class. Class Description BlockingCollection Provides blocking and bounding capabilities for Thread-safe collections that implement Iproducerconsumercollection Lt T>. Concurrentbag Represents a Thread-safe, unordered collection of objects. Concurrentdictionary Represents a Thread-safe collection of key/value

methods of Nsarray.Ii. Nsset and Nsmutableset(i) Nsset immutable collectionBasic use:(ii) Nsmutableset variable setBasic use:(iii) Comparison of Nsset and Nsarray(1) Common denominator:1) are all collections and can hold multiple objects2) Only OC objects can be stored, not non-OC object types (such as int, such as the basic data types and structure, enumeration, etc.).3) is immutable and has a variable subclass.(2) different points:1) Nsarray Order,

Generic collections in C # provide a number of static extension methods based on Enumerable, such as Find, Average, Distinct, etc., in useBasic DatatypeCollection, you can call these methods directly, but if you are a custom type, you should do so based on the interface required by the extension method.Custom-type extension interfacesClass, the essence of which is to use an instance method of an extension class to complete a particular operational log

collections class provides static methods for many operation sets, many of which are used for searching and sorting. 6. list is a sorted collection that can contain repeated elements. Sometimes, list is also called a sequence. The list interface is implemented by the arraylist class, sorted list class, and vector. arraylist is the implementation of a Variable list array, similar to the behaviors and functions of the Vector class, the listlist is the

Using the Generic System. Collections. Generic. KeyValuePair requires two type parameters, namevaluepair C # When you are preparing to use the Hashtable traversal by System. Collections. Generic. KeyValuePair, the Code prompts an error: This is actually a very simple error. In Eclipse, you can solve the problem by clicking the prompt in the tool pop-up, but not Visual Studio 2010. However, the prompt als

Immutable Collections (3) Immutable List () /Xuan Hun Immutable Collections(2)ImmutableList Implementation Principle.(I), ImmutableList . NET3.1 ADD Main ([] args) {fruitBasket =. Create (. IsEmpty) // { Node (T key, Frozen = falseNode (T key, ImmutableList NodeNewNode ImmutableList ( Main ([] args) {fruitBasket =. Create

The following methods are more practical in front-and-back data interaction. Self-organizedCodeAs follows: (If you have a better way to share it togetherOh ): Package COM. map; import Java. util. arraylist; import Java. util. collections; import Java. util. comparator; import Java. util. hashmap; import Java. util. iterator; import Java. util. list; import Java. util. map; import Java. util. set;/** sort by object length in the list by compariso

Collections. synchronizedlist factory Method Generally, MAP, set, and list implementations are NOT thread-safe. Using these factory methods, you can get the corresponding synchronization container, which is equivalent to enhancing access control. After passing a linked list object, we all perform various operations (both synchronous methods) through the returned linked list object, instead of manipulating the underlying linked list. In addition, the b

Because the. NET Framework does not provide the set operation function, we can use a third-party class library to implement this function (now with the LINQ, it is much more convenient ). There is an iesi. collection. dll in the Nhibernate framework. This Class Library provides the set operation function and supports generics.Function: obtains the same, different, and connected parts of two sets. Example: Using system; using system. data; using system. configuration; using system. web; using sys

The difference between Collection and collections in Http://www.cnblogs.com/dashi/p/3597937.htmlJava 1, Java.util.Collection is aCollection Interface (a top-level interface of a collection Class)。 It provides a common interface method for basic manipulation of collection objects. The collection interface has many specific implementations in the Java class Library.The meaning of the collection interface is to provide a maximum unified operation for a v

1. DictionariesDo not agree with multiple values for a key: when there is a conflict (that is. Dictionary keys are assigned repeatedly), taking the last (recent) assignment.>>> dict1 = {' foo ': 789, ' foo ': ' XYZ '}>>> Dict1{' foo ': ' XYZ '}2. Sets are divided into mutable sets (set) and immutable sets (Frozenset)(1) Variable set (set). You can add and remove elements, and do not agree to immutable collections (Frozenset).Note that a mutable set (s

Collection:#一种数据类型, there is the function of the heavy, disorderly (can not be based on the subscript to take the value)Two methods of defining collections:1: First define a list and then convert to a collection by forcing the typea=[1,2,3,4,4,5] #set (a) force type to convert list A to a collection, a duplicate value of 4 is reset2:s={1,2,3,4} #与字典要区别开Operation of the collection:List1 = {1, 2, 3, 4, 5, 6, 9}List2 = {2, 3, 4, 6, 1}List3 = {1, 2, 3}Pri

first, comparable interface, collections classCommon Algorithms for list: Sort (List); If you need to sort your custom classes, you have to implement the comparable interface to implement a method that compares two class sizes Shuffle (List); Random arrangement void reverse (List); Reverse order (linked efficiency) Copy (); Copy the collection, provided the size () is the same (length, and the difference in capacity) Fill (Lis

First, the collection(1) Assembly interfaceCollection-list-queue-setMap(2) Collections Tool classSecond, List(1) ArrayList default capacity is 10, 1.5 times times growth, thread unsafe(2) LinkedList bidirectional linked list implementation, thread insecure(3) Copyandwritearraylist thread safety, through the replication of data to achieve final synchronization, can not ensure simultaneous synchronization, high-performance read, write performance is low

open ('file_new','W') as FW:#This is a multi-file operation, open two files, FR is read FILE.TXT,FW is a new File_bak file forLineinchFr#each row in the loop file.txtNew_line = Line.replace ('I'm','Me') Fw.write (new_line)#write to the File_bak fileCollection:A collection is also a data type, a similar list of things, it is characterized by unordered, non-repeating, that is, the collection is no duplication of dataFunction of the collection:1, it can be a list of duplicate data remov

Today, look at the Java pen Test, found that there is such a problem, compare collection and collections differences. Keep a record of the differences here.1, Java.util.Collection is a collection interface . It provides a common interface method for basic manipulation of collection objects. The collection interface has many specific implementations in the Java class Library. The meaning of the collection interface is to provide a maximum unified opera

Set Coordinates: namedtupleFormat: Variable name = namedtuple (any name, list) fromcollectionsimportnamedtuplepoint=namedtuple (' point ', [' x ', ' y ', ' Z ']) p=point (1,2,0) print (p.x) print (p.y,p.z) print (Isinstance (p,tuple)) Operation Result:0TrueBidirectional queue: DequeHttps://docs.python.org/2.7/library/collections.html?highlight=deque#collections.dequeFrom collections Import Dequeq = Deque ([' A ', ' B ', ' C ']) q.append (' x ') #尾