.
The sort direction is not important, and MongoDB can traverse the index in any direction.In conclusion, composite indexes are very efficient in point queries, which directly locate the age, do not need to sort the results, and return the results.
Multi-valued query (Multi-value-query)
Db.users.find ({' age ': {"$gte": +, "$lte": 30}})
Finds documents that match multiple values. Multi-valued queries can also be understood as multiple point queries.A
We often see the form in the HTML of the page like [if LTE IE 9] ... The code for [ENDIF] represents a statement that restricts certain browser versions to execute, so what are the rules for these judgment statements? Please see below:
Project
Example
Description
!
[If! IE]
The NOT operator. This was placed immediately in front of the feature, operator, or subexpression to reverse the Boolean meaning of
I. Setting method:A. Ensure the connectivity 4G signal of the computer's region is good;B. For the first use, you must first maintain the computer's Wi-Fi network status to ensure that the computer can access the Internet through wifi. (for the first time, you only need to link the Wi-Fi network and then you can directly use the LTE network)C. Click the Start menu in the lower-left corner of the screen, and click the "Lenovo Internet acce
mailbox, which is used to upload a local repository to GitHub and display code uploader on GitHub;Use the command:git config--global user.email "registered mailbox"//Set up a mailboxThe GIT client has been installed and the GitHub configuration is complete, and now the code can be transferred from GitHub.Uploading filesFirst, login to the Gitlab homepage to create a new projectTaking the lte/lte-powerpc.gi
;3. As a 3GPP anchor point between LTE and other 3GPP wireless communication systems;4. Responsible for idle mode mobile phone downlink data path termination and when its downlink data arrived at the call to find the mobile phone left idle mode for data reception;5. Responsible for managing and storing user content;6. Copying user information in charge of lawful interception;7. To assist the service quality policy control and implementation, as well
business needs in the future and maintain the flexibility of the data model;4. Efficient or not. Whether it is simple for developers and efficient for system operation.Taking wireless professional 2g, 3G, and LTE as an example, at least before the arrival of the disruptive NFV/SDN technology, despite the changes in its communication technology, however, the resource data model of the network management system does not need to change significantly. Fo
Learn about GSM's overall network architecture today.Before understanding the GSM network architecture, let's take a look at its system composition:MS: Mobile user or Mobile station, ≈td/lte inside the UEBSS: Base station subsystem, containing BTS,BSC; a part of the enodeb of Nodeb≈lte in BTS≈TD; BSC≈TD Rnc≈lte;SS: Switching subsystem: MSC,VLR,HLR,AUC,EIR, these
In smarty If Statement and PHP If Statements are flexible and easy to use, and several features are added to fit the template engine. If Required/ If Appear in pairs. You can use Else And Elseif Clause. you can use the following conditional modifiers: EQ, NE, NEQ, GT, LT, LTE, le, GTE, GE, is even, is odd, is not even, is not odd, not, Mod, div by, even by, odd by, = ,! =,>, Equal EQ, not equal to ne, NEQ, GT greater than, Lt less than, GTE, GE great
the 28,000 MHz (GHz) band, compared to the current fourth generation long-term evolution (4G LTE) service with a rate of only 75Mbps. The previous transmission bottleneck was widely considered a technical problem in the industry, while Samsung Electronics used 64 antenna Units Adaptive array transmission technology to solve the problem.
The future 5G network transmission rate of up to 10Gbps, which means that mobile phone users in less than a second
the field you want to display does not have the store property set so the default is false and the field will not be displayed if False#stored_fields设置搜索结果只显示哪些字段GET jobbole/job/_search{ "stored_fields": ["title", "Company_Name"], "query": { "Multi_match": { "query": "Search Engine", "Fields": ["title^3", "desc" ] }}Sorting by sort search resultsNote: The sorted field must be a number or a dateDesc AscendingASC Descending#通过sort搜索结果排序 # Note: The sorted field must be a numbe
the data from the last index, sequentially traversal can get the desired results.
The sort direction is not important, and MongoDB can traverse the index in any direction.On the other hand, compound index is very efficient in point query, it is not necessary to sort the result and return the result.
Multi-valued query (Multi-value-query)
Db.users.find ({' age ': {"$gte": "$lte": 30}})
Find documents that match multiple values. Multipl
mongocursor
while (Cursor.hasnext ())
Log.debug (Cursor.next (). Tojson ());
Query all documents and use blocking callback method for all results
Blogs.find (). ForEach (block
Log.debug (Document.tojson ());
});
Query all documents, Get Title field (string), likes field (Int32), tags field (array) in the resulting document
Blogs.find (). ForEach (block
String title = document.getstring ("title");
int likes = Document.getinteger ("likes");
list
Log.debug (title + "-" + Likes + "
calls.
.
These use cases show that videos are not used for two-way conversations, but for unilateral real-time video communication. Generally, one party wants to see the other side of the conversation.
Medical care is an important field. One Party on the move needs the advice of experts, and more applications are available for mobile video calls. This is a unique feature of the video call system.What will happen in the future?
We have the available mobile video call function, which has both
coffee shop or a large department store, the owner only wants a login page, so I think there will be only one Wi-Fi solution for each venue ."
Baker said operators that want to occupy part of the Wi-Fi market are scrambling to catch up. "But they encountered obstacles because they started from scratch. The Cloud and O2, our closest competitors, already have about 15 thousand Wi-Fi hotspots, And we have 4.5 million (including Fon access points ). In the past two or three years, we have significa
IE conditional comment how to playIf you have played with conditional annotations, you can omit the following introductory remarks.IE Conditional comment (Conditional comments) is the private code of IE browser, is a syntax comment block similar to if judgment, supported on IE5.That's what the code looks like.!--[If IE 6]>You are using IE6! [endif]--> Copy CodeHis syntax is an ordinary HTML comment!–comments–> the branch block starts with the [if condition (conditional)]>! [endif] End. Condition
false), mixed use is not accepted.
FindOne () and find () are basically the same, but findONe () returns only the first piece of data no matter how many documents meet the query conditions. The syntax and usage of findOne () are the same as that of find.4.2.1 query Selector
If mongodb only provides the query method described above, the powerful query function of mongodb is too well-known. Next we will learn the powerful query selector of mongodb.
In the document of mongodb, it is divided into c
mailbox, which is used to upload a local repository to GitHub and display code uploader on GitHub;Use the command:git config--global user.email "registered mailbox"//Set up a mailboxThe GIT client has been installed and the GitHub configuration is complete, and now the code can be transferred from GitHub.Uploading filesFirst, login to the Gitlab homepage to create a new projectTaking the lte/lte-powerpc.gi
function Getqos_one ($ethnumber) {$qos = new Qosclass (); $file = "/usr/local/lte/em100cfg". $ethnumber; echo $file; $ Content=file_get_contents ($file); $list =explode ("\ n", $content), $qosarry =array (); for ($i =1; $i
Why is the value gone after the unshift? or is the value of the fourth replaced by the previous number of values?
Reply to discussion (solution)
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