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Questions tagged [data-retrieval]

Data retrieval involves extracting the wanted data from a dataset.

In order to retrieve the desired data the user present a set of criteria by a query which selects the demanded data from the dataset. The retrieved data may be stored in a file, printed, or viewed on the screen.

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Firebase Analytics - Failed to retrieve Firebase Instance ID

I´m trying to implement Firebase Analytcs into my app. But I can´t see any data at Debugview or Dashboard. In log I can see a message "W/FA: Failed to retrieve Firebase Instance ID" I don't know if this is the problem. This is my code: public static…
Flávio Leal
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Python script that notifies me when a update is made to a website.

I need to make a script that will notify me when a change is made to a website. I am not sure about the best way to go about this and I don't know what python has that will be useful. Any push in the right direction would be helpful.
wDroter
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PHP Resource ID error

I want to retrieve or output data in the database but I kept on getting the error called "Resource ID". Here is my code:
user759630
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How to store Multiple Pieces of Data in jsTree nodes using a Single Attribute?

In order to store arbitrary data in jsTree nodes, I'm passing a custom attribute (say node-data) to the create_node method. But I need to store more than one piece of data in the single attribute. (For example name,age etc.) What format would be…
Can't Tell
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TypeError: undefined is not an object (evaluating..)

In console before render() this.state.data1.length is not giving any error but as soon as I use it in view tag this is giving error as : TypeError: undefined is not an object (evaluating '_this.state.data1.length') If I delete this line from view…
developer_user
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How to retrieve values after a hash collision

I have read in many places that after a hash collision in Java it is internally using a linked list/tree, based on the number of hash collisions.Till this is fine, But how to retrieve back the expected value using the 'key'
Jijo Francis
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Displaying data from firestore into bootstrap HTML table

I want to display data from my CoverTransaction collection into a bootstrap table. Although the data is retrieved correctly(displayed in console) but the bootstrap features like show entries, pagination seems to not work when I load data from…
Ruzna
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Retrieve images in recyclerview from Firebase Firestore

I am trying to retrieve images from Firebase Firestore. I am able to retrieve text in RecyclerView successfully however I'm not sure how to retrieve the images. I had a look at similar questions unfortunately none helped. ListActivity : …
Neha
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Sporadically Slow Calls From .NET Application To SQL Server

I have a table in SQL Server that I inherited from a legacy system thats still in production that is structured according to the code below. I created a SP to query the table as described in the code below the table create statement. My issue is…
Greg
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How do you get specific firebase data without knowing the unique id?

I have some data in my firebase database that I want to retrieve. I did one big push so that all instances would have a unique id. I know want to retrieve this data I know I can do this: var gymData =…
Red Baron
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Urllib urlopen/urlretrieve too many open files error

Problem I'm trying to download >100.000 files from a ftp server in parallel (using threads). I previously tried it with urlretrieve as answered here, however this gave me the following error: URLError(OSError(24, 'Too many open files')). Apparently…
CodeNoob
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Retrieving Data from the BattleNet

I have seen sites like "sc2ranks.com" and I totally wonder how they get information I could only access when being ingame. I mean how can I access for example the StarCraft II EU Ladder? Is this just an URL we have to access / download or does this…
Julius F
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How to correct my Naive Bayes method returning extremely small conditional probabilities?

I'm trying to calculate the probability that an email is spam with Naive Bayes. I have a document class to create the documents (fed in from a website), and another class to train and classify documents. My train function calculates all the unique…
Codarus
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Android - Retrieving a string from a specific element of a gridview

I'm pretty new to Android and I have been playing about with GridView. I've got stuck trying to retrieve Strings from individual elements of the GridView so that I can save state based on the changes a user has made. I've mocked up a stripped down…
FinalStraw88
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There is a problem I am facing while getting data from firebase I am getting empty array

I am facing an error while I am retrieving data from firebase. I am using React JS and Firebase Firestore for data storeing. The problem is when I use the useEffect() hook to get data at the start of the application. and saving the data into array…
Muhammad Ahmed Bashir
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