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in my program I defined a data type called Lyapunov_orbit that contains 8 fields, then I used it to read data from external .txt file (see below where I report only a few lines for convenience because the file has about 4000 lines). I need to perform some operations by using such structure (as to find minimum and maximum value of an array) but to handle it I had to declare an "auxiliary" variable called vec_J_cst because if I try to directly use my data strucutre, I get some errors (the structure-name is invalid or missing).

Here is the .txt file:

I wrote this XML file, plus the XSD, and I'm using XQuery to add information on a db in BaseX. I'm using Postman to do the POST requests, but when I run Postman it is giving me this error message:

[validate:error] Validation failed: 1:242: cvc-complex-type.3.2.2: Attribute 'targetNamespace' is not allowed to appear in element 'Reservas'

What is causing this error?

XML:

I'm building a simple register form usin react-hook-form following the documentation and I'm not really sure about how to use yup and validations

First, I had defined object with some rules, but then when I added Controller component I have a prop called rules. Controller errors are working, but not the ones from yup schema.

Is yup necessary? Can someone explain too me a little better the proper way to use it? Also, I'm not really sure about how to define rules at Controller component

I have a Categories table, Attributes and an intermediate table, AttributeCategory, which has id, attribute_id, category_id, date and value, the problem is that when sequelize maps the relationship if the attribute_id and category_id match it does not map it correctly, example:

I'm trying to make an app because of work at school but I can't solve this error (Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setOnClickListener(android.view.View$OnClickListener(android.view.View$OnClickListener) )' on a null object reference at com.grupo1.denu1.RegisterActivity.onCreate(RegisterActivity.java:40), it occurs every time I try to open the registration activity, so I hope someone can help me

my code

Iam getting values from HTML inputs and using ajax to send data from javascript to php and validate them with mysql but i get this error:

I'm trying to do a random number generator with React (I'm new on it) that has an min and max input but it doesn't work well, it's generating random numbers but not between max and min

I am starting to learn to program using BeautifulSoup. What I want to achieve with this code is to save prices from different pages. To achieve this I store the prices of each page in a list and all those lists in a list. The problem is some pages do not save the prices so there are some lists that are completely empty. What I am looking for is that those empty lists are assigned the elements of the "ListaR" so that later I do not have problems. Here's my code:

I'm trying to validate user data using express-validator, but when I call the user registration method in the controller from routes file, the page doesn´t load. If I extract the method to the route, it works. I want to keep it separated to keep some order in my project. Here is my routes file: