if not empty

Setabc123zaddz0abcevallocalc = redis. pcall (& #39; get & #39;, KEYS [1]) if (c. err) thenreturnc. errelsereturncend1abcevallocalc = redis. pcall (& #39; get & #3 Set abc 123 Zadd z 0 abc Eval "local c = redis. pcall ('GET', KEYS [1]) if (c. err)

Building a simple interactive website (ii) 5.5 Counter Let's add a counter to the home page. This example has been spoken many times, but it is helpful to demonstrate how to read and write files and create your own functions. Counter.inc contains

This article describes the basic JavaScript regular expression, we are not familiar with JavaScript regular expression can be learned, speaking of JavaScript is the basis of the regular expression, unfamiliar classmates let's have a look! Regular

Recently, have time to read a bit of PHP the code. The first is the integrated environment First,phpMyAdmin creates a blog table. Pure interface operation, the process is relatively simple, it is important to note that the ID is the primary key,

: This article mainly introduces the configuration file of the php Tutorial (2). If you are interested in the PHP Tutorial, refer to it. ; ========================================================== ========================================== ; ======

Operations after determining whether it is null Judge whether $ a, $ B, $ c, and $ d are empty. if not empty, add a comma between each adjacent variable. if only one is not empty, no comma is added, and empty variables are not output. Is it too

PHP php. ini time zone settings problems PHP php. ini time zone settings problems Php. date is added to ini. the timezone option is disabled by default, that is, the displayed time (no matter what php command is used) is the

[From] http://www.cnblogs.com/love007/archive/2013/06/26/3156852.htmlUse the demo account to read the calendar information, note the contents of the calendar reading (Body) read. The code is as follows: (with EWS API version 2.0)1. The following

The onclick of the control and other events, it is important to have the system automatically generated before the method to change the name, or after the addition of a name may cause the method can not be run. The best habit is to give it a name

OC Constructor in the object initialization (the constructor can be called directly at this time)1. usually starts with init, (dynamic method)2. the return value is preferably the return ID,steps: 1. Call Super's construction method:2. determine

Implement the following operations of a queue using stacks. Push (x)--push element x to the back of the queue. Pop ()--Removes the element from in front of the queue. Peek ()--Get the front element. Empty ()--Return whether the

Rsync server-side configuration file[[email protected] ~]# vim /etc/rsyncd.confuid = root           #rsync使用的用户gid  = root           #rsync使用的组use  chroot = no     #rsync的一个安全配置, if True, The daemon will chroot to the path before transmitting the

Object Pool Implementation AnalysisWhat is Object pooling technology? Where is the object pool applied?Object pooling is actually caching some objects to avoid creating objects of the same type, similar to the concept of a thread pool. The object

Viewstub is a lightweight view that exists as a tag in the layout file and does not instantiate the view when acitivity loads the layout, but when Viewstub is called in Code inflate () method, the view is instantiated.Define a viewstubViewstub is a

Linux interprocess communication-Using datagram socketsprevious article, Linux interprocess communication--using flow sockets to introduce some basic content about sockets (sockets), and to explain the use of the flow sockets, this article will tell

The main implementation is to add characters from the tail and remove the character from the head??Add a direct push from the tail into a stack1??Removing from the head requires that the characters in the stack1 be pressed into the stack2and then

definition and basic terminology of treesA tree is a finite set of n (n>=0) nodes t,t is empty when it is called an empty tree, otherwise it satisfies the following two conditions:(1) There is only one specific node called root (Root);(2) The

struct BinTree{ int data; BinTree * left; BinTree * right;};Recursive versionvoidPreOrder(BinTree * root){ if(root != nullptr) { cout data; PreOrder(root->left); PreOrder(root->right); }}Cyclic version

For php-5.2 php. ini Chinese version (2); [UPDATES]; configuration instructions for php-5.2 php. ini Chinese version (2) ; [Updated on December 3,] ; ========================================================== ================================== ;; =

I have never written any articles after years of hard work. Today, I am eager to contribute some strength to the LNMP camp. I will share my experiences and skills in my daily work. Today, we are familiar with Mysql and start the blog of home bird. I