How does trec_eval calculates Mean Average Precision (MAP)?
search-engine,information-retrieval,data-retrieval
MAP is indeed a simple arithmetic mean of the AP scores for individual topics. (But remember that AP for an individual topic is computed over all relevant documents. There is a frequently used incorrect definition of AP that computes 'AP' over only relevant retrieved documents, but that is a nonsensical...
how to recover data from factory to controller angularjs
angularjs,angularjs-scope,indexeddb,angularjs-service,data-retrieval
This is occuring because you are logging the factory return value before it has returned from the server, so it is undefined. You have to use a promise to wait until the factory actually contains data. In angular, you create a promise using the $q service. app.factory('MGAindexdb', function (jsonService, $q)...
Unable to retrieve createdAt values from Parse objects
ios,uitableview,swift,parse.com,data-retrieval
Don't access it using objectForKey, just access it directly via the createdAt property. As explicitly stated in the docs, the keys: This does not include createdAt, updatedAt, authData, or objectId. It does include things like username and ACL. ...
Count rows of data and display in view ASP.net MVC
sql,asp.net,asp.net-mvc,count,data-retrieval
using (var context = new TalyllynContext()) { ViewBag.Count = context.Bookings.SqlQuery(" SELECT * FROM dbo.Booking Where Wheelchair_Access = 'true' ").Count(); } return View() ...
How big a factor is blob size on retrieval time in Azure Storage?
azure-storage-blobs,data-retrieval
It depends on your E2E usage scenario but for simply uploading text files to Azure Blob Storage I would suggest going with the simpler but larger ~1MB files as the difference after reducing the size will probably be negligible. You can also take a look at the Azure Storage Scalability...
Getting Contacts from user's phone
android,firebase,contacts,android-contacts,data-retrieval
Most probably if you are using that code inside Activity than i think getActivity() is not required ,you can directly call getContentResolver() but if still doesn't work than try this to get contacts and other details . I am copying code from one of my project so hope you will...
What is the best way to retrieve table from MySQL using PHP?
php,mysql,stored-procedures,data-retrieval
You can use frameworks for this: Medoo Orm system If you have to run same query, you can create a procedure in MySQL as Sirko said....
How to get a parameter as a result of a search condition from a XML-File? [duplicate]
java,web-services,parsing,data-retrieval,pattern-finding
Use XPath to extract the specific tag with a condition. Like "/Person[@name='Peter']/" Refer this article for how to use XPath in Java....
Android parse value from .sqlite file
You had database which has more than 1000 of records and it's in assets folder of application... For that you need to copy asset database to installed app folder and then use it using SQLiteOpenHelper.. For more details with example you can take reference from here.. How to ship an...
How to update the value of a boolean variable in swift?
object,swift,parse.com,boolean,data-retrieval
You're not assigning the new value to the object property, you're assigning it to a local variable. Get rid of the let keyword, which declares a new local variable, in: let checkEmail = User["emailVerified"] as Bool ...
How to retrieve data from sql by List<> instead of data table?
sql,database,list,data-recovery,data-retrieval
Follow these steps create a class emulating your table declare the list retrieve data and bind it to the list display your data public class myListClass { public string myListClassItem1{ set; get; } public string myListClassItem2{ set; get; } public string myListClassItem3{ set; get; } } List items = new...
Questions about CACM collection
search-engine,information-retrieval,data-retrieval
There is a Cornell Computer Science Technical Report written at the time the collection was created that describes the collection. See: http://hdl.handle.net/1813/6401 Ellen Voorhees NIST...
How to download a file from a URL in C, as a browser would?
c,download,server,httpserver,data-retrieval
Use libcurl, and see this examples page. If you want to get it to work, make it work with the command line curl too, and use the --libcurl option. I suspect the problem might be more to do with javascript, cookies, a login or whatever. All these are soluble, but...