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array to get the character array. Let's explain the problem of the subject. I did the same experiment in the default terminal of ubuntu kylin Chinese environment, but the result is exactly the opposite to that of the subject: See no? Neither the subject nor I lie. Why? Because Unicode ("Chinese character", "gb2312 ")I think the key is to distinguish between the concept of "Byte" and "character",

what circumstances are indexes, but not used?Indexes do not always take effect, such as the following, which will invalidate the index : If there is or in the condition, even if some of the conditions in the index are not used ( which is why the use of or

What is imessage?IMessage is a chat tool in iOS devices, a bit like micro-mail, but imessage can phone video, chat, voice, SMS and so on.the difference between imessage and SMSIMessage send information is free and the message is charged and imessage as long as there

What is the server used? Can data be saved? So what is the difference with the database? For example, the user's profile picture is stored on the server. I don't know what the server

What is the role of the hook function in thinkphp? What business logic is generally used for processing? Reply content: What is the role of the hook function in thinkphp?

(){ }Public Person (driver Driver ){This. Driver = driver;}Public void drive (){Driver. Run ();}Public void setdriver (driver Driver) {// using parameter polymorphism, you can buy any car in the futureThis. Driver = driver;} Public static void main (string ARGs []) {Person P = new person ();JD = new JD (); // buy a JD if you have no money at the beginningP. setdriver (JD );P. Driver ();Benz = new Benz {(); // you have money to change your car.P. setdriver (Benz );P. Driver ();}}

In Linux, you often use CTRL and other key combinations, which are commonly used and what is the meaning of it? CTRL + C ends a running program Ctrl+d end input or exit shell Ctrl+s Pause Screen Output "Lock terminal" Ctrl+q restore screen output "unlock terminal" Ctrl+l clear screen, "lowercase letter

With the current in our lives in the role of more and more obvious, many enterprises have tried water marketing, mode for a stubble and another stubble, but can not find a good way, powder mother flow platform with you detailed introduction of what is easy to do marketing.Now the most commonly used on the market is Tho

Under what circumstances is the redis database used? What kind of database is suitable for redis? Under what circumstances is the redis database us