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$# is the number of arguments passed to the script. $ is the name of the script itself. $ is the first parameter passed to the shell script, and the second argument that is passed to the shell script is [email protected] is a list

GreenDAO (2) of android_orm framework, which is used by androidgreendao I. Overview In the first article of greenDao last time, we introduced the steps and basic usage of greenDao. We will continue to learn about greenDAO. Data Query display is one of the most commonly used functions in applications. greenDAO provides us with powerful query support

who said that test work is relatively easy, recently familiar with a few case, almost not crazy. Recently it is intermittent to see my angularjs, always feel that they are still not getting started, it may be that they owe the front end of things too much, can not see a few lines of code there are several commonly used functions unfamiliar. I have seen the video of the desert, and I know some good features

the Follower node informing the data that the state has been committed.In this process, the master node may be hung up at any stage to see how the Raft protocol guarantees data consistency for different stages.1. Before the data reaches the Leader nodeThis stage Leader hanging out does not affect consistency, not much to say.2. Data arrives at Leader node but not replicated to Follower nodeThis phase Leader hangs, the data belongs to the uncommitted

energy-saving technology, which is entirely done by the processor's voltage-tuning mechanism, and is not related to the chipset. The operation of switching between these modes is all automatic, according to the load of the processor at that time, so that the energy consumption situation can be precisely controlled to achieve more energy-saving purposes.

operator. It is enough to parse the above.In the previous article we emphasized that expression is a data structure , that is, the red part, the code we define is essentially stored in a data structure ,The red Bottom is: The Binaryexpression type, which represents an expr

Tag: Represents the binary Java bit Operation shift Operation nbsp Topic Direct BracketsThe fastest operation in the computer is the direct binary operation,In Java, it is possible to perform binary operations in the preferred bit operation.The problem is to investigate the shift operation, to understand, left to move Like the

Simply put: Layer-1 switchOnly physical layer protocols are supported (one phone-controlled switch can be called ???)L2 SwitchSupports physical layer and data link layer protocols, such as Ethernet switches.L3 SwitchSupports physical layer, data link layer, and network layer protocols, such as some switches with routing functions. In terms of the ISO/OSI hierarchy, switches can be divided into L2 switches and L3 switches. A layer-2 Switch refer

Problem Description:There are five different colors of the room lined up in a row, each room with a different nationality of people living; Everyone is drinking a particular brand of drink, smoking a specific brand of cigarettes, raising a specific pet;no two people smoked the same brand of cigarettes, drank the same brand of drinks, or raised the same pet. Question: Which country in the room in that color is