what is meaning of gamification

it's better to invoke a script with void (0)or Several ways to open a new window link 1.window.open (' url ') 2. Use Custom function ------------------------------------------------------------------------------- If it is a #, there will be jumps to the top of the situation, the personal collection of several solutions: 1:2:3:4:5: ------------------------------------------------------------------------------- The above content

~ Represent your/home/user directoryAssuming your username is x, then ~/is/home/x/.. Is the directory itself, but generally can not writeSo CD ~/. and CD ~ and CD ~/effect is the samebut there's something else on the back, point at the head of the file name, representing a hidden file~/.local

the use of less frequent data, will bypass the cache, directly into memoryRead. So not every time you can get the data from the cache, this is the cache hit rate, can be read from the cache hit, or die. register variable For an example that calculates the approximate value of π, an approximate formula for the solution is as follows: To improve accuracy, the more loops the better, you can define

Using Get,set can make the class definition more canonical, because, normally, if we write a custom class, his property is either public or private, but if the properties of public are to be restricted, such as a person's age does not allow negative numbers, nor is it allowed to be greater than 150, Then you are only limited to the int type is not enough. A perso

PDO: ATTR_CLIENT_VERSION what does this double colon mean? the two symbols in the PHP class edited by lghyt in 2013-12-0612: 34: 45 are dizzy. PDO: ATTR_CLIENT_VERSION nbsp; what is the meaning of this double colon PDO: ATTR_CLIENT_VERSION? At the end of this post, the two symbols in the PHP class were edited by lghyt

$# 是传给脚本的参数个数$0 is the name of the script itself $1 is the first parameter passed to the shell script $2 is the second parameter passed to the shell script [emailprotected] is a list of all parameters passed to the script $* is to display all parameters passed to the scri

Specific examplesif (Datetime?) dbsources) { var backurl = request["backurl"string. Empty;}The example code above means: The first is if the question mark function of the If judgment bracket, is to let itself cannot take the value of NULL value type can take null values, such as datetime and int type. The double question mark in the IF statement is

Today to share with you what is the key word. Mainly divided into 5 parts, including: Why is called the keyword, the keyword itself is how to come to the name, and then talk about the relationship between keywords and search engines, keyword classification of what, when the

meaning. In the memory management of the operating system, there is a kind of important algorithm is the memory page replacement algorithm (including FIFO,LRU,LFU and so on several common page substitution algorithm). In fact, the core idea of the cache algorithm and the memory page replacement algorithm is the same:

November, the winter solar term is just the relay stage of autumn and winter, the intensity of Siberian cold and Mongolian high pressure is obviously strengthened, and the cold front is the vanguard force, which affects most parts of our country. At this time the cold air brings us the weather feeling, in the normal year, is