lazy programmer

Lazy, deferred loading Lazy Validity: Only when the session is open to be effective, after the session is closed lazy is ineffective. The lazy policy can be used in: * * * * The difference between 6.1 get and load: * Get does not support deferred loading, while load support. * When querying for data that does not e

In ssh, Hibernate is lazy loaded, session problems are learned and understood, and sshhibernate The following describes how to obtain a session in this project: Public Session getCurrentSession () {// add, delete, and modify sessions. The transaction must be enabled (Required, that is, propagation = "REQUIRED"); otherwise, return sessionFactory cannot be obtained. getCurrentSession ();} public Session getQueryCurrentSession () {// The session used fo

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: This article mainly introduces php regular expressions-greedy mode (or +) and lazy mode (? Or + ?) For more information about PHP tutorials, see. . Represents any character except \ n; * represents 0-infinity; + represents 1-infinity; . *-Indicates matching characters other than 0 or multiple line breaks; . +-Indicates matching one or more characters other than line breaks; No? Indicates gr

Lazy thinking makes a wayIn fact, in the process of reading the second article I have a lot of questions, really lazy people created a method of it? At present, my course learning Foundation is really not good, the book mentioned a lot of just in my study life has not been involved, what Goto statement,Pascal Ah what I do not understand, Let's not say a 1 million-word code. After that, it is true that

# This series is aimed at 0 basic and non-industry students, introduce my commonly used, may be useful for many people lazy methods and ideasThis is the 1th article, deliberately speak very shallow, hands-on explanation, feel the IQ is insulted classmate can skip the corresponding paragraphThe general idea of this series You can't be too diligent. All mechanical duplication of work, as long as the ROI (ROI) cost-effective, consi

1# include2# include3 4 using namespacestd;5 6# define MAX1000047# define Lid id18# define RID id1|19 TentypedefLong LongLL; One intN; A - structSegtree - { the intL,r; - LL lazy,sum; -InlineintLen () - { + returnr-l+1; - } +}tree[max*4]; A at intA[max]; - - voidPUSH_UP (intID) - { -Tree[id].sum = tree[rid].sum+tree[lid].sum; - } in - voidPush_down (intID) to { + if(tree[id].lazy

If cascading queries occur in Hibernate, lazy loading problems may occur, such as I now have the account (Admin) class, Category (Commodity category) and product (product) class, from left to right are a one-to-many relationship, and the @manytoone (Fetch=fetchtype.lazy) is set from right to left. I am now going to find out the product information to pack into the JSON format to the front desk, I use the query in the background as follows:From the Pro

What is lazy loading ? Hibernate provides a mechanism for querying a data without immediate access to the database when a lazy load is set, so it does not return the specified object, but instead returns the proxy object, which is not null. It is actually an object that hibernate automatically implements subclasses of the class that the specified object belongs to, and that object has a default value. The

The origin of lazy loading functionThe concept of lazy loading functions was first seen in the book " Advanced programming of JavaScript"; Sometime last year, I accidentally turned to this chapter; it suddenly felt quite reasonable. Lately, we've always been exposed to Ajax, and we know that differences in behavior between browsers cause us to use Ajax, especially when creating XHR objects, using a lot of i

I do network marketing has been more than 2 years, the first in the network company, the hands of dozens of stations, and night to do the promotion, the results of a big update Baidu every time, always fear to see the rankings. Later the author left to a car parking lock manufacturers, responsible for internet marketing search engine entrance This piece, the hands of only 3 sites, so often to do the optimization of soy sauce, but the effect is not bad. This article is to share a

. This informs hibernate to use an external association (outer join) in the first query to get its associated data directly. In the conditional query API, you should call the Setfetchmode (fetchmode.join) statement.Use a one-to-many example:Fetch = "Select" is the query at the time of the first one end of the entity, and then the query based on one end of the entity, will produce 1+n SQL statement;Fetch = "Join" is the query when the use of outer joins to query, will not be inferior 1+n phenomen

Lazy Loading Lazy loading is ubiquitous in IOS development Lazy loading format is as follows: var person: Person = { print("懒加载") return Person()}() Lazy loading is essentially a closed package The above code can be rewritten in the following format let personFunc =

Lazy Loading in Hibernate1. Class-level query policy:Lazy:true (default value)False (Load Now)2. Many-to-one associated query strategy:Lazy:proxy (default value)No-proxyFalse3. One-to-many or many-to-manyLazy:true (default value)FalseExtraFetch: Affects hibernate generation for the underlying SQLFirst, the class level of the EMP mapping file is set to non-lazy loadingThe second one will report a null pointe

Proxy modeProxy mode uses proxy objects to complete user requests, shielding users from access to real objects. The real-world agent is authorized to perform some matters of the parties without the parties appearing, from the perspective of a third party, it seems that the parties do not exist, because he only communicates with the agent. In fact, the agent is to have the authorization of the Parties, and in the core issue also need to consult the parties.In software design, the use of proxy mod

Sayhi ()Void {3 4 }5 //only in this class can you call the6 Privatefunc SayHi3 () {7 8 }9 //only in this class, in the category calledTenFileprivate func SayHi2 () (){ One A}Class method:1. Use class to modify class methods in this class2. Use the static modifier class method in the classification1 classPerson:nsobject {2 3 //in this class, class methods are decorated with classes4 classFunc Sayhi () (){5Print"Hello world,i ' M the class met

PHP regular expression greedy mode and lazy mode greedy mode when a regular expression contains a qualifier that can accept duplicates, the common behavior is (on the premise that the entire expression can be matched) match as many characters as possible. Consider this expression: a. * B, which will match the longest string starting with a and ending with B. If you use it to search for aabab, it will match the entire string aabab. This is called greed

[IOS learning basics] weak and strong, lazy loading, cyclic reference, and iosweakI. weak and strong 1. Understanding When I first started to learn the UI, the description of weak and strong was most often described as "introduced by ARC. weak is equivalent to assign in OC, but weak is used to modify objects, however, they do not add 1 to the reference count, while strong is equivalent to the retain specified in OC, which will add 1 to the reference c

Lazy Load is a jQuery plugin written in JavaScript. It can delay loading pictures from long pages. Images outside the viewable area of the browser are not loaded until the user scrolls the page to where they are located. This is exactly the opposite of how picture preloading is handled.Lazy loading of pictures in long pages containing many large pictures can speed up page loading. The browser will enter the ready state after the visible picture is loa

Lazy evaluation of SwiftHaskellThere is a feature in the function函数的返回可能是一个块(一个被延迟计算的表达式)Which leads to a concept惰性求值=2==1There is a segment analysis below在使用严格求值的语言里，函数的参数总是在应用函数之前被求值。以 isOdd 为例子：子表达式 (1 + 2)会首先被求值，得出结果 3 。接着，将 3 绑定到变量 n ，应用到函数 isOdd 。最后， mod 3 2 返回 1 ，而 1 == 1 返回 True 。Haskell 使用了另外一种求值方式 —— 非严格求值。在这种情况下，求值 isOdd (1 + 2) 并不会即刻使得子表达式 1 + 2 被求值为 3 ，相反，编译器做出了一个“承诺”，说，“当真正有需要的时候，我有办法计算出 isOdd (1 + 2) 的值”。Advantages of