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kandi X-RAY | IDAO Summary
kandi X-RAY | IDAO Summary
Please note, that python 2 is not supported by the evaluator. Please use python 3. The metric is implemented in the evaluating script score_submission.py. The format of the submission is very similar to the one used in qualifying round. You can find a sample submission in sample_submission folder. The Dockerfile describes the system used to run your solution.
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Top functions reviewed by kandi - BETA
- Calculate the mean score of a DataFrame
- Compute the weighted similarity between the series
- Check for missing columns
IDAO Key Features
IDAO Examples and Code Snippets
Community Discussions
Trending Discussions on IDAO
QUESTION
I have two tables (command and commandLine), i want to write in both when i insert a new command Here is my Command Object, I use a OneToMany to map with the object CommandLine
...ANSWER
Answered 2021-Mar-17 at 09:22It's not applying the changes because there is no transaction and so the persist operation is not flushed to the database.
Here a simplified example of what the code should look like:
QUESTION
This is my controller:
...ANSWER
Answered 2017-Dec-11 at 08:50Just mock it as well as any other dependency:
QUESTION
I am just finishing a simple PHP Framework for a University project and I am trying to create a simple Data Access Object per entity which encapsulates all Database interaction and I am not going to use Doctrine or another tool for this, I need to do it myself, It needs to be simple but robust, I will try keep my question as clear as possible.
I want to create one DAO class per entity so it acts as a bridge between a table and an entity. I am learning a bit from Doctrine but cant find enough information.
Since I have a Dao class per entity obviously all DB logic will be in the Dao, the entity will have pure domain logic, Each Dao is responsible for creating entities and all read/write operations to data layer
My main question is what is the best and most efficient way to load entity associations especially if I wish to load the FULL ASSOCIATION?,
I am trying to understand how this lazy and eager loading works under the hood for entity associations, (not partial columns)
If I just want a column I could use a join but If I want the whole entity the only way I see this being possible is to either make another query to the database or use multiple queries in one execute statement with rowset to fetch the associated entity.
What if I have many associations, what if the database is on a different machine? I want to keep it as flexible as possible but I do not want unnecessary complexity, Are there any significant differences in performance?
Especially as if I am getting multiple entities from different tables, If I have to issue multiple queries, is there any real difference between lazy and eager loading? As there are more or less the same queries being made,
I will use the simple example of an Article and Comments 1:many relationship as an example:
...ANSWER
Answered 2020-May-21 at 00:47Maybe this will help, I sudo coded out a bunch of stuff but hopefully it gets the idea across.
QUESTION
I am trying to change a file looking like this :
...ANSWER
Answered 2020-Mar-29 at 15:00$ awk '/^>.*#/{sub(/^>[^#]+/, ">model_" ++c)} 1' ip.txt
>model_1#Dakota
text
text
text
>model_2#Idao
text
text
text
>model_3#Alabama
text
text
text
>model_4#Dakota
text
text
text
>model_5#Honduras
text
text
text
QUESTION
I have some json data saved in the assets folder. I use this code to read and process it into data classes I have created:
...ANSWER
Answered 2020-Mar-04 at 12:26In general, I would handle this by using Room's support for populating your database from an asset. That's a relatively recent addition to the Room API, and it should be faster than what you have.
Ignoring that, you would need to pass something into your DatabaseCallback
constructor (e.g., a function type) that could be called from your onCreate()
function when your work is completed. Whatever is creating your database (e.g., a repository) would provide that DatabaseCallback
constructor parameter and deal with the result.
So, for example, your constructor could be:
QUESTION
I'm running into some difficulties with getting my code to work properly with a GUI. I've created a simple login program connected to a database, which in the GUI lets the user type in a username and password, which is then prompted to the database in order to see if the username and password exists. I've created a class that connects to the database, and one DAO-class, that executes the SQL-statements. I've also got two more classes where one of them is an interface and one contains unimplemented methods for later on.
Now, what I'm having problems with is connecting the GUI to my database, which should be done via the DAO-class. My GUI has two textfields which should be used to compare the usernames and passwords to each other, but i don't know how to do it. Also, my DAO-class is not exactly implemented for it, since it take an int as a parameter.
If you could help me out I'd be greatful.
UserDAO-class:
...ANSWER
Answered 2019-Oct-29 at 16:46Maybe if you do it this way
QUESTION
I'm coding a SQL generator based on java reflection (it's intended to be used with generics in the future). I receive an object as a parameter to generate the table name, fields and field values (for insert and update operations), but in my DAO classes I'm instantiating a new empty object, that won't be used anywhere else in the code, just obtain these information. Is there a way to cast some sort of "ghost" object, which won't occupy memory space, to serve this purpose?
This is the class responsible for generating the SQL:
...ANSWER
Answered 2019-Oct-10 at 06:00In Java, you can never directly access objects. What you have is object references (like pointers in C or C++) that can refer to an object. Therefore different classes and methods can share objects by using different object references that refer to (point to) the same object. If several classes (or methods) share objects, rather than each creating a new object for their sole use, no additional space is used for the second and subsequent uses. So although you can not create a ghost object, you can do something equivalent by sharing objects. This works best if the objects are immutable.
If a method uses an equivalent immutable object every time (which seems to be the case for your method), you can save the cost of object creation by changing the object to be a static
object, so the object is created when the class is loaded and shared for all subsequent method executions.
This is what the Collections.emptyList()
method does:
Implementations of this method need not create a separate List object for each call.
QUESTION
// Domain Class
public class Actor {
private int id;
private String firstName;
private String lastName;
private Date lastUpdate;
// getters and setters
}
// DAO Interface
public interface IDao {
void save(T t);
}
// Concrete Class
public class ActorDao implements IDao {
@Override
public void save(Actor actor) {
// Error: The method save(Actor) of type ActorDao must override or implement a supertype method
}
}
...ANSWER
Answered 2019-Aug-05 at 03:14You need to specify what class that T is, like so :
QUESTION
I am trying to configure my Spring Boot application with annotations and to use @Autowired annotation in it. When I check whether I have my Bean loaded or not, it is loaded, but with @Autowired it says NoSuchBeanDefinitionException
As you can see further I tried to check if my Beans were actually loaded, so when I run my application, I can see my Bean's name in the console. Also, I tried to add 'scanBasePackages = "com.log.iei.Logistica"' to my @SpringBootApplication annotation, but it changed nothing. Also, I tried field autowiring
Here is my main class:
...ANSWER
Answered 2019-Jun-21 at 19:59You should check if your files are inside base packages. For example, if you have:
QUESTION
Taking as reference the post Spring @Autowired and @Qualifier
We have this example to fix the autowiring conflict :
...ANSWER
Answered 2019-Apr-16 at 13:04You can use @Primary instead of @Qualifier
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