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I need to find the value of a function given its unknown by interpolation. The problem is that the one I created is way too inefficient.

Firstly, I read a data file that contains both y=g(T) and T, but in discrete form. And I store their values in a std::vector.

After this, I convert T (std::vector Tgdat) to x (std::vector xgdat). This will be the x-axis that will accompany the y-axis, (std::vector gdat).

Then, I create a function to interpolate my vector std::vector gdat, so that, given some x (which its value is in between two elements of the vector std::vector xgdat), the program can spit some value for g(x). This function receives the vectors by reference, not because I want to modify them (that's why I also pass them as const), but so that the computer doesn't have to create copies of it.

I'm trying to build a shiny app that filters a data frame based on user entries, however, i'm struggling using a function I created to do this task, the error Problem with 'filter()' input '..1'. x Input '..1' must be of size 9 or 1, not size 0. keeps apperaring. I found a similar issue here but the answer didn't help.

Here's my code. And also here are the xlsx and csv files with example data.

I appreciate a lot your help

I am trying to create a dynamic dropdown menu using ajax but its not loading the list. My dropdownlist is loaded from my controller for both the categories and the brands. But I cant seem to get the brands dropdownlist load dynamically on selection from the category dropdownlist. I don't know where I am getting it wrong.

My Blade file

I am starting to use Folium to generate interactive maps, of which I need to generate a map with markers from different data sources, that is, I have this:

Im new to programming, just a junior for now. I have list of checkboxes. And when I uncheck a checkbox, I want that particular column to disappear from front-end. Simply to say, I have a table with some data in it. Lets say it has 3 columns, and when i uncheck 2 of them, those 2 columns should disappear. Here is a code sipped of mine, for now, it saves unchecked checkboxes to LocalStorage. Thank you for any advises and tips! Really appreciate if you can show m a good direction to move :D

I use the following command: wmic path Win32_PhysicalMemory get TypeDetail to get the type detail value. It returns: 16512. From the Microsoft docs: https://docs.microsoft.com/en-us/windows/win32/cimwin32prov/win32-physicalmemory

Only the following values are available:

Reserved (1) Other (2) Unknown (4) Fast-paged (8) Static column (16) Pseudo-static (32) RAMBUS (64) Synchronous (128) CMOS (256) EDO (512) Window DRAM (1024) Cache DRAM (2048) Non-volatile (4096) Nonvolatile

But there is no description for value: 16512. So, my question is: how to get the description for this value? Thanks.

I have a dataset which looks as follows:

I have a loop in R that does very time-consuming calculations. I can set a max-iterations variable to make sure it doesn't continue forever (e.g. if it is not converging), and gracefully return meaningful output.

But sometimes the iterations could be stopped way before max-iterations is reached. Anyone who has an idea about how to give the user the opportunity to interrupt a loop - without having to wait for user input after each iteration? Preferably something that works in RStudio on all platforms.

I cannot find a function that listens for keystrokes or similar user input without halting until something is done by the user. Another solution would be to listen for a global variable change. But I don't see how I could change such a variable value when a script is running.

The best idea I can come up with is to make another script that creates a file that the first script checks for the existence of, and then breaks if it is there. But that is indeed an ugly hack.

Inspired by Edo's reply, here is an example of what I want to do:

I'm using ASP.NET Core 2.1, and I'm trying to create a user. But when I run the web application and try to create a user, the Id returns 0. I've tried using a hidden field in my razor view but the ID still returns zero and the user is not added.

Here's my user class: