sonos need to get started

:. ./function.shCan not write:. function.shIf function.sh is a user-passed parameter, how do you get its absolute path? The method is:Real_path= ' Readlink-f $ ' #$1 is a user-entered parameter, such as function.sh. $real _pathUser input executes script when incoming script runs in input select menu stdin and stdout common commandsThe SH script combines the power of a system command, in the field of character processing, with grep, awk, sed Three musk

command lineAlthough I do not advocate you must learn the command line, there are too many articles that have always emphasized the importance of learning command line. Here I assume you already know his importance and already know how to use it to handle some simple management tasks. You can make the appropriate configuration according to the instruction book and manual. But don't blindly copy and paste. That is, do not take orders without thinking, and many of you who have a liberal nature ex

"Getting Started" is a good motivation, but it may be slow to play. If you have a project in your hand or in your head, you will be driven by the goal instead of learning as you learn the module.In addition, if every knowledge point in the knowledge system is a point in the graph, and the dependency is the edge, then the graph must not be a graph with no direction. Because learning A's experience can help you learn B. Therefore, you do not

Computer Vision is an important field of artificial intelligence technology. For example (not necessarily appropriate), I thinkComputer Vision is the eyes of the AI age, Showing the importance. Computer Vision is actually a very ambitious concept. It is the skill tree that someone has summarized in computer vision. If you are not familiar with computer vision, Do not be scared by this skill tree. No one can master all the above skills at the same time. This tree just gives you a rough understa

still go back to outreach, also count his mission success, this is the task itself rules and order of decision, but the program of the world is not order, need programmers through code to build this disorderly world to form order. The resources themselves must contain constraints and rules to be used correctly.Java itself provides control over how resources are dispatched by multiple threads.synchronized Keywords· Atomic Bag· Reentrantlock· Semaphore

For enterprise software development, it is often difficult to take over a new project, for example: my current project has not been completed, and the project I took over is a part of the project that someone else has already started, the project I took over has been completed, and the first wave or several waves of developers are no longer in the company, and I want to do something new features, apply new technologies that I have never touched, and s

Derby http://db.apache.org/derby/ official Derby learning materials 1: http://www.oschina.net/code/snippet_12_71 Derby study 2: http://hotpepper.javaeye.com/blog/237831 The following content is from the Internet and is not summarized by individuals. Bytes. Because it is implemented in Java, it can be run on any platform. Another feature is that it is small in size and free of installation. You only need a few small jar packages to run it. The Derby da

through the name of the stored procedure.4. What are the advantages of accessing a database using a stored procedure rather than directly using SQL statements? A: (1) The stored procedure is precompiled, no need to compile, and more efficient to execute.(2) A batch of SQL statements is encapsulated in the stored procedure, which facilitates the maintenance of data integrity(3) Code reuse can be implemented5. What is the difference between function an

capacity = 80GB, and a total capacity of 9 partitions after the split * 10GB capacity = 90GBNote: This split of two partitions from a partition will only share the read and write throughput of the original partition. As an example:5000 reads and 2000 writes, DYNAMODB creates 4 partitions at this time, and each partition reads and writes capacity of5000/4 = 1250 Read capacity2000/4 = 500 Write capacityAssuming that one of the partitions is about to full 10g,dynamodb will split the partition out

dictionary3. Radiansdict.fromkeys (): Create a new dictionary with the key of the dictionary in sequence seq, Val is the initial value corresponding to all keys in the dictionary4, Radiansdict.get (Key, Default=none): Returns the value of the specified key if the value does not return the default value in the dictionary5, Radiansdict.has_key (key): If the key in the dictionary dict returns True, otherwise returns false6, Radiansdict.items (): Returns a traversed (key, value) tuple array in a li

as "none" has no index associated with it. This pattern is typically used if DocumentDB is used as a key-value store and accesses the document only through its ID property. from Official introduction is not a man-of-the-line, look at a half-day out of a general meaning is when the data changes can be found in the index layer, the same is no matter whether the system is busy, any data changes are immediately updated to the index layer, the delay is not busy when the update, a moment can

declared in this way are only valid for the client used by the current user. Example 4--creating a stored procedure with multiple out type parameters Delete users based on the Age field, return the number of deleted users, and the number of users remaining: SELECT Row_count (); Gets the number of rows, which is exactly the total number of records affected to get inserted, deleted, updated "The difference between a stored procedure and a cus

IMOOC video resources, of course, some people say there is a Jikexueyuan, NetEase Open class, which I have seen several times, I suggest beginners or everyone has their own merits, Imooc Python explained that he is serious, and audio quality is relatively high, The most critical is the programming practice of the direct website, do not install the compiler, very convenient. Family travel is necessary.More than 3. Writing a program seems absurd, but it is true. There's no shortcut to learning pr

Scene: Local debugging (frequent start/stop servers) Online publishing (requires starting/stopping the server each time) Advantages: For both local and online No need to restart the server, improve the efficiency of development and commissioning, improve the efficiency of publishing, operation and maintenance, reduce operation and cost What are the different ways Java implements hot deployment? By configuri

"Wind code generator [Firecode Creator]" is a variety of database based program code generation software, can quickly establish data information: Add, edit, view, list, search function. The default provides ASP, ASPX Web programs,. NET common three-tier framework web programs,. NET Windows programs, several code frameworks, and multiple interface design templates. The built-in. NET code framework, which can build a. NET solution for the C # language, can be edited directly in VS2005 to help the.

Share the learning methods for getting started with PHP. Everyone has different ways of learning. the purpose of this article is to share their learning processes for reference only. do not blindly use others' learning methods, find useful learners and learn differently from each other. the purpose of this article is to share your learning process for reference only. do not blindly use others' learning methods, find useful learning methods for yoursel

books and experimenting with code If you want to buy books, you just need to do it. It seems that lz has bought more books, and some of them are actually repeated. Advanced, I personally think: Thinking + constantly writing code Restructuring Cainiao stage, continue Coding 5. About this pile of notes Objective: To get started with python and learn more Version

taught his disciples and eventually left his hands, not to mention strangers. Of course, it would be a good choice to ask someone to give you some advice. A popular saying for a female friend is "a man can stand by and a sow can go to a tree". it doesn't mean anything else, but it just lets friends know what it means, don't rely solely on others to teach you how to learn I would also like to say that the patience of people who cherish the number of answers answered by others is limited. they m

questions, I don't want to explain what a popular saying for a female friend is: "A man depends on a sow, and a sow gets a tree." It doesn't mean anything, Just let friends know what this sentence means. I would also like to say that the patience of people who cherish the number of answers answered by others is limited. They must cherish this limit and do not ask any questions, some questions can be asked if you can find the answer by yourself. Every time you ask a question, the patience of ot

the backbone of knowledge, you can kill a crowd, such as the backbone of knowledge to consolidate good, and then slowly back to fill the surrounding knowledge.4. Review the original project:　　After we have a systematic study of domain knowledge, we need to go back and review the previous project. There is a review of the previous project, and we will find that many of the methods that were previously implemented may be low-level, or where the project