warehouse objective

Objective-c learning 2 Overview, objective-c OverviewThis article mainly introduces some basic concepts to understand the Retina screen of the IOS device of the Objective-CSDK Application This is what I would like to explain. when Steve Jobs launched the iPhone 4, the word Retina screen swept the world (I thought the Retina screen was an apple screen: pixel d

Objective-C basic core syntax-Summary, objective-c syntax I. Grammar nature "Point Syntax" is essentially "method call" When the dot syntax is used, the compiler automatically expands the corresponding method. 1 // call method 2 Student * stu = [[Student alloc] init]; 3 [stu setAge: 10]; 4 int age = [stu age]; 5 // ------------------------------- I am a gorgeous split line -----------------------------

Development and implementation of the business intelligence platform for Small and Medium Enterprises (data warehouse, Bi system, and real project practices)Course category: data and data warehouseSuitable audience: elementaryLesson count: 76 lessonsTechnologies used: Data Warehouse, Bi system, and real project practiceInvolved projects: business intelligence platform for small and medium-sized enterprisesC

insufficient data access capabilities, its access performance to a large amount of data is significantly reduced. With the maturity of C/S technology and the development of parallel databases, the development trend of information processing technology is from a large number The transaction database extracts data and clears and converts it to a new storage format, that is, the data is Aggregation in a special format. With the development and improvement of this process, such special data th

-makingStorage is called Data Warehouse (DW ).W. H. Inmon defines data warehouse as a topic-oriented and integrated data warehouse that supports management decision-making processes..A topic is the standard for data classification. Each topic corresponds to an objective analysis field, such as a customer or store.Assis

. With the development and refinement of this process, the special data that supports decision making Storage is called a data Warehouse (Warehouse, DW). W. H. Inmon The Data Warehouse is defined as a data warehouse that supports the management decision process, the theme-oriented, integrated , stable, different time

Objective-c object-oriented basics, objective-c object-oriented Currently, mobile development is booming. Today, I am studying the recently started Objective-c basic tutorial at home. net is very different. In order to better learn and understand Objective-c, we will record the learning knowledge points in the form of

Do not repost the labor results of developers Objective-C is obviously different from other object-oriented systems.The following describes the features of this method: compatibility, wordString, class, method, attribute, protocol, and classification.1. CompatibilityObjective-C is an object-oriented C language. In objective-C code, there can be C and C ++ statements, It can call C functions or access metho

In Objective-C, several methods are used to declare a Block. objective-cblock 1. As a local variableReturnType (^ blockName) (parameterTypes) = ^ returnType (parameters ){...}; 2. As a class Property@ Property (nonatomic, copy, nullability) returnType (^ blockName) (parameterTypes) 3. method parameters-(Void) someMethodThatTakesABlock :( returnType (^ nullability) (parameterTypes) blockName; 4. The call

Objective-C: KVC, KVO, and objective-ckvckvo 1. KVC (Key-Value encoding) Key Value Coding 1.1 in C #, the Object can be obtained through string reflection to read and write the Object attributes. Object-C has the same implementation, through the string (attribute term) read and Write the attributes of an object. 1.2KVC is defined by the NSKeyValueCoding protocol, and the Object implements this Protocol. The

Objective-c ios multi-thread GCD deep understanding, objective-cgcd Two important concepts are added to GCD: task and queue.A thread can have multiple execution queues, and all tasks are added to the queue waiting for execution.The main queue column is a special serial queue. You can specify serial or parallel for the self-created queue. The Global queue is a parallel queue. Task: An operation. What do you

Objective-c series-@ Property point syntax, objective-c // Explain the meanings of modifiers in parentheses behind the property: // Nonatomic non-thread-safe non-atomic operations features: high efficiency of operation variables // Atomic thread-safe atomic operations features: low efficiency of operation variables // // Retain strongly references instance variables, that is, the setter method contains: //

Use of Objective-c kvc and KVO, objective-ckvckvo Use of KVC In general, we use attributes or access methods to access instance variables. However, we can also use Key-Value-Coding (KVC) the value of the instance variable to be accessed by key-value encoding. KVC process: First, we define a Person class. The Code is as follows: /**Person.h*/#import @interface Person : NSObject { NSString *_name;}@end/**P

Objective-c instance variable access level, objective-c instance In C # and JAVA, both method and variable have strict access level control, so the access level is rarely used in object-c, the reason may be that there is no access-level syntax on the method. There is no strength to control variables alone. Next we will discuss the access level of instance variables. When the instance variable is declared in

Objective-C class, function call, and objective-c call 1 // 2 // main. m 3 // L02HelloObjC 4 // 5 // Created by JinXin on 15/11/25. 6 // Copyright©JinXin. all rights reserved. 7 // 8 9 # import

Objective java Reading Notes the first consideration is to use the static factory method instead of the constructor. Objective Reading Notes For a class, the most common method for clients to obtain a senior instance is to provide a common constructor. There is also a way to release your hair, and you should also have a place in the toolbox of every programmer. Class can provide a common static factory meth

Use of @ encode in Objective-C, objective-c @ encode Today, when I read Mansonry's code, I came across a rare keyword (maybe I have never used it myself ). :-) @ Encode => encode a given type as an internal string. In order to make it easier for you to check it out, you can also write a small example here to learn how to use it. NSLog (@ "UIViewController: % s", @ encode (UIViewController )); NSLog (@ "CG

The path to ios: Objective-C block syntax. NSDate and NSDateFormatter, objective-c.nsdate I. Block syntax Block Syntax: anonymous functions can be defined within a function. Format: ^ return value type (parameter list) {function body}. The return value type can be omitted. Simple block exercises: ①. Calculate the maximum value of two numbers // Int (^) (int, int) // block type int (^ max) (int, int) = ^ (i

Objective-c particle animation, objective-c Particle I have posted a few articles on SpriteKit. the animations involved are material-type image switching or conventional animation effects, and do not involve the particle animation to be mentioned today, today, particle animation is a required class for better and cool effects in games. In OC, particle animation mainly involves two classes: CAEmitterLayer an

Objective Language (OC)-circular references, objective language (oc)-circular references In the previous article, we introduced the reference problem when operating objects in arrays and the concept of automatically releasing a pool: Http://blog.csdn.net/jiangwei0910410003/article/details/41926183 Today, let's continue to look at a pain point in the reference count: circular reference Here we will not expla