In peacetime development of more or less inevitably encounter infinite pole classification problem, because the efficiency, logic and other problems have always made this kind of problem is more acute. Today we take the YII2 framework as the
The first scenario:The use of recursive algorithms is also the most frequently used, most open-source programs are the same, but generally only use the level four classification. The database structure design of this algorithm is the simplest. A
The word "infinite recursive Classification Query" sounds very advanced. the literal meaning is to query all the categories, "recursion" refers to a function form used in queries-recursive functions.
The word "infinite recursive Classification Query"
We already know that there are infinite prime numbers. At that time, we used the most common proof method:
Suppose there is the largest prime number P, then we can construct a new number 2*3*5*7 *... * p + 1 (all prime numbers multiply by 1 ).
A. Infinite sequencetime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputVasya likes everything infinite. Now he is studying the properties of a sequences, such that it first element is equal toa( s1? =
Introduction:Recently in the project to participate in a coupon collection activities, when multiple users to receive the same coupon, the use of database lock control concurrency, the initial assumption is: if more than one person to receive a
Picture carousel:First, the realization effectAuto-Carousel for imagesSecond, the implementation of the CodeLayout in StoryboardCode:1#import"YYViewController.h"23@interface Yyviewcontroller () 4 @property (weak, nonatomic) Iboutlet Uiscrollview
Infinite classification is a kind of design skills, often used in development, this article mainly introduces the implementation of infinite classification of PHP, it is necessary to understand.
Infinite class classification is a kind of design
This article mainly introduces the implementation method of the infinite element list in Python, which is very useful. if you need it, you can refer to the example in this article to illustrate how to implement the infinite element list in Python,
This article mainly introduces the method of implementing infinite pole classification tree in PHP, and analyzes the principle and implementation method of infinite pole classification with the example form, which involves the operation skill of PHP
PHP Recursive traversal multidimensional array implementation of infinite classification method, recursive multidimensional
In this paper, we describe the method of recursive traversal of multi-dimensional arrays in PHP for infinite classification.
PHP Simple implementation of the infinite classification of tree list method, PHP classification tree list
In this paper, a simple way to implement an infinite classification tree list is described in PHP. Share to everyone for your reference.
PHP implementation recursive and Infinite classification method, PHP implementation of recursive classification
In this paper, we describe the recursive and infinite classification method of PHP, and share it for your reference. The implementation
Due to the recent busy project, there is no time to update the blog, so take advantage of the Sunday in the room to the recent projects encountered in the technical summary. Recently in the project to do a Viewpager unlimited scrolling picture needs,
Infinite recursion caused by MyBatis level-1 cache and mybatis level-1 Cache
Introduction:
Recently, I participated in a special offer collection activity in the project. When multiple users receive the same offer, I used database lock to control
In my simpla, using the infinite classification, the use of PHP's reference ideas to achieve an infinite classification method, you can perfectly display a similar classification pattern.The specific implementation code is as follows: if there are
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
The problem of infinite traversal of thinkPHP3.2, troubled for a few days
First map and code------------
Infinite recursive function --
/*** Infinite recursion* @param $data* @param $pId* @return Array* @author Zheng Jingqiang*/function
http://samueli.iteye.com/blog/224755BigDecimal Division operation error, errors are as follows:non-terminating decimal expansion; No exact representable decimal resultThe reasons are:BigDecimal Divide (BigDecimal divisor, int scale, int roundingmode)
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