embedded mongodb

Assume that there is such a document:DB. XXX. Remove (); DB. xxx. insert ({"ID": 1, "members": [{"name": "buleriver1", "Age": 27, "gender": "M "}, {"name": "buleriver2", "Age": 23, "gender": "F" },{ "name": "buleriver3", "Age": 21, "gender": "M"}]});

1.1 Overview of embedded systems 1.1.1 definition and composition of Embedded Systems Embedded systems are application-oriented, computer-based, and can be used to reduce hardware and software. They are suitable for application systems, dedicated computer systems with special requirements for functions, reliability, cost, volume, and power consumption. The essent

Db. getCollection (mobiles ). ensureIndex ({params. name: 1, params. value: 1}); db. getCollection (mobiles ). insert ({_ id: 1, name: ME525, brand: Motorola, params: [{name: standby time, value: 200}, {name: design, va Db. getCollection ("mobiles ")

Tags: style http color java using OS strong IOa MongoDB introductionMongoDB is a high-performance, open-source, modeless document-based database that is a popular one in the current NoSQL database. It can be used in many scenarios to replace a traditional relational database or key/value store, MONGO using C + + development. MONGO's official website address is: http://www.mongodb.org/, where readers can get more detailed information.Characteristics:It

[Course sharing] This article introduces how to transplant and develop an embedded linux system (Environment setup, uboot porting, and embedded Kernel configuration and compilation), and how to implement uboot. Embedded linux system porting and development (Environment setup, uboot porting, embedded Kernel configuratio

Directory Brief introduction MongoDB installation (Windows) Getting Started with MongoDB basic syntax and operations (Mongo.exe client operations) Library operations Insert Inquire Modify Delete Stored Procedures Nodejs manipulating MongoDB Insert Inquire Modify Delet

a faster sort. D.3 You can create a data mirror from a local U or network, which makes MongoDB more scalable. D.4 If the load increases (requiring more storage space and more processing power), it can be distributed across other nodes in the computer network, which is called fragmentation. D.5 MongoDB supports rich query expressions, and query directives use JSON-form tags to easily query objects and ar

the powerful query functions of MongoDB, and queries by operators such as $ in, $ or, $ ne, $ lt, and $ gt)Lecture 8: MongoDB query syntax 2 (describes in detail the powerful query functions of MongoDB, such as regular expression query, array query, and embedded document query)Lecture 9:

In-depth understanding of how to configure MongoDB in MongoDB (1) LinuxI MongoDB Introduction MongoDB is a high-performance, open-source, and non-pattern document-based database. It is a popular NoSql database. It can be used in many scenarios to replace traditional relational databases or key/value storage methods. M

很多学习嵌入式设计同学都会发出这样的感慨，“学嵌入式好难啊”!!这是因为你对学习嵌入式没有掌握一个好的方法，当你掌握了，就会发现其实也很简单，今天我就总结了一些自己的学习方法给新人们参考。其实只要用心，真的很简单!可能以下的说法您觉得听得次数太多了，但是没什么用，其实真的没用吗，你真的按照你的规划区做了吗？Learn the premise of embedded: first, maintain a good mentality, can not be anxious. Learning embedded is not overnight can be done, to step by step insist. Second, to have a clear learning plan, clear learning steps, make a plan, clear what to learn, and

This is the graduation brother's Virgo blog, I hope you do not spray!!!Due to the needs of the laboratory project, graduating brother began to study Python at 9 o ' Night (2014/11/05). Oneself a bit obsessive-compulsive disorder, install what software all request new, so give oneself windows to install a Python3.3 (also bury a thunder for oneself). Before I installed Python-2.7.3 on a Linux machine, I didn't think much of it, thinking that the Python Premium version was backwards compatible. So