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title: javaEE(SSM) learning notes 4: dynamic SQL Dynamic SQL import [main function]: splice SQL clauses according to different conditions or different data to achieve similar programming effect in XML files. [main element (mark)]: Query criteria: single branch if; Multi branch choose... when... other Special treatment: where /trim Up ...

Stack and Queue 1. Differences 2. Definition of stack #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; const int N=100010; int stk[N],tt; //insert stk[++tt]=x; //Eject tt--; //Determine if stack is empty if(tt>0) not empty else empty //Top of Stack stk[tt ...

1, What exactly is the $symbol? $is the attribute defined for the window object in jQuery $and jQuery can be interchanged when used. In fact, it is a function, which comes from the jQuery library jQuery and $are used as an attribute of window             window.jQuery = window.$ = jQuery;             ...

CL236 configure IP failover – configure NFS Ganesha In this chapter, learn how to configure NFS Ganesha to solve the problem of high availability. RHCA column address: https://blog.csdn.net/qq_41765918/category_11532281.html NFS Ganesha feature NFS Ganesha is a user mode file server for NFS. It supports NFSv3, NFSv4 and NFSv ...

Audio-Video Synchronization - Main Code Logic That's how you chase me Because the audio format sample channel rate is fixed, an audio time can be determined, so an audio is synchronized to the audio as the base video General practice: after displaying a video frame, get the PTS of the next video frame, and compare it with the clock lock of t ...

linux bg and fg commands Under linux, if we want a task or program to be executed in the background, we can use &. In fact, linux also provides commands for other task scheduling. bg: change a command suspended in the background to continue execution; [background background background]fg: transfer the command in the background to the fore ...