Introduction to Lazy Loading lazy loading
Lazy loading is also the way of Swift
(Apple's design idea: that all objects are actually loaded into memory when they are used)
Unlike OC, Swift has a special keyword to implement lazy loading
The Lazy
Release of programmer thinking: Breaking the norm, and breaking the norm of programmer thinkingMake a summary for the following time:For programmers like me who have just been on campus, they may be more concerned with code details, instead of training their divergent thinking projects one by one. Many things are overlapping, we never wondered why it was like this? Why is this problem? Why should the logic
bundle5NSBundle *bundle =[NSBundle Mainbundle];6NSString *file = [Bundle Pathforresource:@"things"OfType:@"plist"];7Self.things = [Nsarray arraywithcontentsoffile:file];Iv. use of plist documents noteThe file name of 1>plist is not called "info" or "info".2> add plist and other file resources, be sure to tick the following optionsIf you have forgotten to check the situation, you can use the way to solveV. Lazy loading1> Why use
What is deferred loading? Resultmap can implement advanced Mapping (using association, collection for one-to-one and one-to-many mappings), association and collection have lazy loading capabilities. Resulttype cannot implement lazy loading. Lazy Loading : The database performance is greatly improved by querying from a single-table query, when needed, and then fr
Today is very pit father, do interface, TableView obviously did reuse, array also did lazy load, get data before also put the array to empty, but every time to get data refresh table, the data does repeatedly overwrite (repeat create), later to the cell added a white background image after still not, helpless , had to think of his law, want to get data directly pop up to a view directly cover the original TableView, but this to do to the user's experi
Level 1 cache, level 2 cache, and lazy loading (transfer) in Hibernate, and level 1 cache in hibernate1. Why cache?
Hibernate uses cache to reduce the number of accesses to the database, thus improving the execution efficiency of hibernate. There are two types of cache in hibernate: level-1 cache and level-2 cache.2. Level 1 Cache
The level-1 cache in Hibenate is also called the session cache. When the save/saveOrUpdate/get/load/list/iterator method o
Transferred from: http://www.cnblogs.com/xiaoluo501395377/p/3371776.htmlin Hibernate we know that if we want to get an object from the database, there are usually two ways, one is through the Session.get () method, the other is through the Session.load () method, Then there is a difference between the two methods when acquiring an entity object, which is different in query performance. I. Load loading modeWhen using the Load method to get an object, Hibernate uses the mechanism of
EF Lazy Loading: When you use LAMABDA expressions or LINQ to query data from an EF entity object, EF does not directly query the data, but instead loads it into memory when it uses specific data.
One, what object does the where method of the entity object return? Code Analysis:
Region query article List +actionresult article ()
Query a list of articles
Public ActionResult article ()
{
Get a list of articles from a DB object
hibernate bidirectional onetoone fetchtype lazy problemCategory: Hibernate2013-06-26 14:54 932 people read comments (2) favorite reports Reproduced in: http://mshijie.javaeye.com/admin/blogs/440057When you use JPA (Hibernate) today to implement a one-to-one association, you find that lazy loading cannot be used. The person is associated with a picture. When the person is read, the picture is displayed f
()); Session1.gettransaction (). commit (); Session1.close (); }4.get and loadGet: Load in a timely manner, just call the Get method to query the database immediatelyLoad: Lazy loading by default, queries to the database when data is used5. Lazy LoadingWhen the data is used to query the database, this is Hibernate lazy loading feature.Lazy valueTrue Us
iOS Development UI article-Lazy Loading1. Lazy Loading BasicLazy Loading--also known as deferred loading--is loaded when needed (low efficiency, small memory footprint). The so-called lazy load, write is its get method.Note: If it is lazy loading, it is important to be aware of whether there is already, if not then to
We will analyze load and get two load modes:I. Load loading modeWhen using the Load method to get an object, Hibernate uses a lazy load mechanism to load the object, that is, when we use the Session.load () method to load an object, the SQL statement is not emitted at this time. The currently obtained object is actually a proxy object, this proxy object only holds the ID value of the Entity object, only when we want to use this object, to get other pr
The lazy villain and the diligent villain's story, presumably we have heard many times already. We often say that the person who is difficult to surpass is actually himself, and this sentence itself is not wrong. But the diligent villain and the lazy villain's story, just self-deprecating one kind of way only. A lot of things are not hard to succeed, and the real success is with their own chess.There is suc
Lazy steps to take the stairs, so there is an elevator, too lazy to walk, so they create cars, trains, airplanes, too lazy to calculate, so found a calculator; lazy to repeat the code, so there is a generic programming in C + +!Of course, the above paragraph is my nonsense, the real situation may be completely differen
Format:Only Var can be used here to create variablesLazy var variable: type = {Create variable code} () using:------------------------------------------------------------------------ //1. Lazy loading using the lazy modifier //1.1 Use to reload //1.2 multiple uses, create only once //array lazy load. Note: Lazy
is that the constructor method of the class is private, and therefore the class cannot be inherited.Lazy single-Case class:The same as the A Hungry man Singleton class is that the constructor method of the class is private, and unlike the A Hungry man Singleton class, a lazy singleton class that instantiates itself the first time it is referenced,As shown in the UML class diagram, a typical lazy singleton
Liaoliang "DT Big Data Dream Factory" fourth talk for and function advanced combat, lazy useDo you want to know big data, do you want to be a yearly salary million? So what are you waiting for, come on! Follow Liaoliang's teacher to learn spark big dataThe use of the for and function advanced combat, lazyFor loopObject for_function_advanced{def main (args:array[string]): Unit ={for (I Printinfor (I PrintinFunctiondef addA (x:int) = x +100Val add = (x:
What is deferred loadingThe association and collection tags in resultmap have deferred load functionality.Lazy loading means that when you associate a query, the master information is loaded first using lazy loading. The associated information is then loaded when the associated information is used.Setting up lazy loadingneed to be Sqlmapconfig.xml file, set the lazy
PHP Implementation Lazy Loading method
This article mainly introduces the PHP implementation lazy loading method, the example analysis of PHP loading principle and lazy loading implementation skills, with a certain reference value, the need for friends can refer to the next
In this paper, we describe the lazy loadi
Lazy LoadIs a jQuery plug-in written in JavaScript. It canDelay loading of images on long pages. Images outside the visible area of the browser will not be loaded until the user scrolls the page to their location. This is the opposite of the processing method of image pre-loading.
Delayed loading of images on pages containing many large images can speed up page loading. The browser will be ready after the visible images are loaded. In some cases, it c
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.