travel | Smart tourism ticketing management system

I am a bit new to R and trying to learn the basics.

I have run into a bit of a problem trying to convert one of my columns into seconds for analysis.

When I try to convert ride_length to numeric it is saying "NAs introduced by coercion" and I cannot seem to change this from character. I am sure there is a way to calculate the travel time using the started_at / ended_at but thought it would be easier to use the ride_length column instead.

I am working with the R programming language.

I generated the following random data set in R and made a plot of these points:

I'm in the process of developing a Client Registration page for a travel agent. The client needs to save the passport number as a record in the MySQL database. I would like to know the data type ideal for mentioning in the migrations page for storing a Passport number. Usually, a passport number contains one or two English Letters and a few digits.

I'm trying to come up with a solution to allow multiple Pane nodes handle mouse events independently when assembled into a StackPane

I need some help writing a function block which I can use to record the travel distance of an axis. This should record every time the axis moves sort of like an odometer, this value will be used for preventative maintenance on the axis. ie greasing the ball screw and linear bearings.

The function has to ignore chatter on the axis when it is not moving and accomodate the homing function which overwrites the position several times.

On Google Flights, search information is encoded in a URL parameter, presumably so users can share flight searches with each other easily. The URL format looks like this:

I had a Java assignment about a month ago, which was about building a GUI. I used GroupLayout to manage the position of the components. I ran into a problem where if I put a very long string of text into a JTextField and resize the outer window, the textfield suddenly "bursts".

I fixed the issue using GridBagLayout, but I wanted to come back to the original problem in hopes of getting a better understanding of GroupLayout.

Here's a SSCCE that demonstrates this problem. (I tried to minimize it as much as I can, I apologize if my example is too long.)

So I have this code below of categories and I will sometimes update it by adding a new category, then I have to manually add that category to the list at the bottom INITIAL_GOAL_CATEGORIES it'd be much easier if this list was automatically updated whenever I create a new dict variable. Is there a way to do this? I export the INITIAL_GOAL_CATEGORIES variable and use it elsewhere so if I can set that variable name to a list of all other variables that'd be great. This file will only contain dicts of categories and the list of all of them at the bottom.

categories.py

I have a tibble that contains a list-column of data frames. In this minimal example, such tibble has 1 row only: