During the past one year of work, all projects have been using ADODB, but its code is bloated and execution efficiency is low, which leads to the need for replacement. Baidu later decided to use PDO. as to why we chose PDO, we will not talk about it
I have already written a PDO database operation class. this time I only modified it on the basis of the previous one.
The code is as follows:
/*
* Author: Hu Rui
* Date: 2011/03/19
* Email: hooray0905@foxmail.com
*
* 20110319
* Common database
First, the mathematical operation classABS (x) Seek absolute value1, the parameters can be integral type, can also be plural2, if the parameter is a complex number, then return the modulus of the complexComplex ([real[, Imag]]) Create a complex
1 /*2 Title Description:3 for a string, and a position in the string, design an algorithm that moves the left part, including the I position, to the right,4 move the right part to the left. Given the string a and its length n and the specific
Reverse the two strings to set two pointers, one to the beginning of the string, and one to the address of the element at the end of the string (the address of the element in front of the "StartThe implementation code is as follows:#include #include
https://leetcode.com/problems/reverse-linked-list-ii/Reverse Linked List IIReverse a linked list from position m to N. Do it in-place and in One-pass.For example:Given 1->2->3->4->5->NULL , m = 2 and n = 4,Return 1->4->3->2->5->NULL .Note:Given m, n
① Mobile (move)MoveTo and Moveby represent absolute and relative coordinates.1 //Move the node (target) to the absolute coordinates (50,0) within two seconds2Auto MoveTo = Moveto::create (2, VEC2 ( -,0));3 //node Run Action4Mysprite->runaction
Nonsense less say directly on the codefunction Add (x, y) { var total = x + y;Alert (total); return Total ;} Add (5,10);//15This is going to pop up 15.But if such aAdd (2,3,4,5);What will happen to this call?? The answer is 5 (yes,
PHP character escape Function Summary. sometimes, for the sake of security, we need to escape the character strings entered by the user, which may be incorrect or obscure ~~~
Configurations and functions related to PHP string escaping are as
Shuffle () defines and uses the shuffle () function to rearrange the elements in the array in random order. Returns TRUE if successful, otherwise FALSE is returned. Note: This function assigns the new key name to the cells in the array. This will
NuSOAP builds a PHP-based SOAP service. Many organizations have adopted Apach and PHP as their Web application environments. Using PHP in the Webservices mode may seem difficult. But in fact, with NuSoap, you can
Many organizations have adopted
SQL truncation string function bitsCN.com
A. truncates N characters from the left of the string.
Declare @ S1 varchar (100)Select @ S1 = 'http: // www.xrss.cn'Select Left (@ S1, 4)------------------------------------Result: http
B. extract N
Being a programmer, you like arrays a lot. For your birthday, your friends has given you an arraya consisting of ndistinct integers.Unfortunately, the size of a is too small. You want a bigger array! Your friends agree to give you a bigger array,
This led applet is based on the minimum system board of the de-Lai. I was writing this program to be able to easily understand and facilitate portability. The trouble with a pin change for STM32 is that it's hard to get a job, so this time I'm
It's a variant of the problem.Iterates over a tree from the last start level and returns the result. For example:Given binary Tree {3,9,20,#,#,15,7} , 3 / 9 / 7Return its bottom-up level order traversal as:[ [15,7], [9,20], [3]]Idea:
Still like effective part of the book, read several times, here the STL and container related to some basic points of attention to summarize, and then to summarize the iterator, etc.1 for a sequence container to be deleted, the iterator cannot be
Linux is a stable and reliable environment. However, any computing system has unexpected events, such as hardware faults. Reliable backup of critical configuration information is part of any responsible management plan. In Linux, you can perform
Given a binary tree, return the bottom-up level order traversal of its nodes ' values. (ie, from the left-to-right, the level by level from the leaf to root).For example:Given binary Tree {3,9,20,#,#,15,7} , 3 / 9 / 7Return its bottom-up
1. Low Efficiency of fuzzy search:
Cause: Like itself is relatively inefficient. You should try to avoid using like in query conditions; for like '%... % '(Full fuzzy) is a condition where indexes cannot be used. Full table scan is naturally
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