infinite recovery

PHP infinite loop to obtain MySQL Data instance code, mysql instance Recently, the company has a need to obtain data from MySQL, and then display the data on the page in a loop. It is mainly to keep clicking a button, and then the data starts from the beginning to the end. If the data at the end is not enough, then add several records from the beginning of the data. In fact, this function can be implemented through JQ or through PHP + MYSQL, but JQ is

Implementation example of JQuery asynchronous loading of the infinite drop-down box cascade Function This article mainly introduces the implementation of JQuery asynchronous loading of the infinite drop-down box cascade function. For more information, see The Code is as follows: JQuery asynchronously loads the infinite pole drop-down box cascade Function Zjy */

Infinite pole classification, how to add classified products Infinite pole classification, how to add classified products, in addition to recursive call classification, because a lot of classification ------Solution-------------------- Want this infinite pole of thing, have bound data source! Design a good data structure is good! ------Solution-----------------

If a function calls itself directly or indirectly, it forms a recursive (recursion), such as an implementation of the Fibonacci sequence.def fib (n): if n Recursion must have an end condition, otherwise a dead loop is formed, such as the following example:Def a (): B () def b (): A () if __name__ = = ' __main__ ': A ()An exception will be thrown soon:runtimeerror:maximum recursion depth exceededWhat will be reported this anomaly, very simple, we all know that the subroutine call need

A simple explanation　　One problem with the previous program is that it cannot be looped, because there are only five arrays in the plist file, so the first and last ones are gone, and here are some tips for dealing with this kind of loop presentation problem.　　Method One: Use a For loop, loop 200 times, create a 200*=1000 model, and the default program starts in the 100th group position, there are 500 models forward, there are 500 backward models, creating a loop to show the illusion.The code is

Infinite classification is a common situation in development, so this paper summarizes the common algorithm of infinite Pole classification.1. Loop Iteration Implementation 1 $arr = [2 1=>[' id ' =>1, ' name ' = = ' parent 1 ', ' father ' =>null], 3 2=>[' id ' =>2, ' name ' = = ' parent 2 ', ' father ' = Gt NULL], 4 3=>[' id ' =>3, ' name ' = = ' parent 3 ', ' father ' =>null], 5 4=>[' id ' =>4, ' name ' =

This article mainly introduces the PHP super awesome infinite Pole classification spanning tree method, this article uses the reference in PHP to realize the tree generation method skillfully, compared to the recursive method high-end many, needs the friend to be possible to refer to under Are you still wasting time and wasting memory recursively traversing the Infinity Pole category, read the article, I think you should change it. This is what I se

Unlimited class classification is a design technique that is often used in development, such as: Site Directory, departmental structure, article classification. I think it plays a great role in the hierarchy of the design table, for example, in some platforms, Fill in the invitation, it is a kind of subordinate relationship, the superior will have a number of subordinates, subordinates will have their own branches, most of the use of the idea of recursion to achieve. Don't say much, first to wa

No more nonsense to say, first to everyone on the left and right infinite sliding code. 1. Left and right infinite sliding public class Mainactivity extends Appcompatactivity {private static Viewpager Viewpager; private radiogroup Group;//Picture Capital Source, the actual project needs to be obtained from the network private int[] Imageids = {r.drawable.ym1, r.drawable.ym2, r.drawable.ym3, r.drawable

Project Thinking Analysis: a PHP project to use the classification, but not certain levels, so want to make an infinite class classification. initially, as before, the database was built with 4 values, as follows: ID: Self | PID: Parent class id | XID: Sorting id nbsp; | ClassName: Category name It was later thought that this was inconvenient when reading data and modified, and was especially inconvenient when the product was read, and change

First scenario:Using recursive algorithms is also the most frequently used, most open source programs do the same, but generally use only four levels of classification. The database structure design of this algorithm is the simplest. Category A field ID in the table, a field FID (parent ID). This allows the upper level to be judged by the WHERE id = FID, using recursion to the topmost level. Analysis: This database designed by the infinite level, can

Today wrote the next infinite polar classification below the code posted up to write a bad. Method of classify one Copy Code code as follows: /* Reader: This is written by yourself the method of realizing the infinite pole classification The editing method is just to edit the category nameNo mobile operation, little brother ability, forget everybody forgive me. The first method: CREATE TAB

A common feature of the application is that when users are happy to load more content automatically, this is done by sending a data request when the user slides a certain threshold value.The same is true: the effect of sliding information needs to be defined in the list of the last visible item, and some type of threshold to facilitate the beginning of the last entry before the arrival of data to start fetching, unlimited scrolling.The important thing to achieve

In this paper, the message Board program uses the principle of infinite class classification, can realize the infinite level message and reply. Message list Gclist retained the message level space, so that message--the level of the reply clearly. Share to everyone for your reference. The specific analysis is as follows: On the function, this procedure can realize the i