Ignorance | Ignorance utilizes the power of ENet to provide | Game Engine library

Good afternoon. I am new to ruby and trying to build my first application. I am using sqlite database and rails 5.0. I have a model called Person that has the first name, last name and date of birth as attributes. On the page where I list people I want to add the age of the people and obtain an average of the ages of the people

My controller looks like this:

I am new to Ruby and I am working on an application where I have a model called Person which has a date of birth.

My goal is to sort all instances of the model starting from the date of birth. But only order by months for example

Javier 10/5/1994

Luke 10/5/1995

Matias 6/10/1993

I am using sqlite as a database and I don't really understand how to achieve it.

My view:

@people = Person.order (: date_birth)

How can I set the month on the date of birth to order it by itself?

Thank you and forgive my ignorance.

This is my first post here and I am not that experienced, so please excuse my ignorance.

I am building a Monte Carlo simulation in C++ for my PhD and I need help in optimizing its computational time and performance. I have a 3d cube repeated in each coordinate as a simulation volume and inside every cube magnetic particles are generated in clusters. Then, in the central cube a loop of protons are created and move and at each step calculate the total magnetic field from all the particles (among other things) that they feel.

At this moment I define everything inside the main function and because I need the position of the particles for my calculations (I calculate the distance between the particles during their placement and also during the proton movement), I store them in dynamic arrays. I haven't used any class or function,yet. This makes my simulations really slow because I have to use eventually millions of particles and thousands of protons. Even with hundreds it needs days. Also I use a lot of for and while loops and reading/writing to .dat files.

I really need your help. I have spent weeks trying to optimize my code and my project is behind schedule. Do you have any suggestion? I need the arrays to store the position of the particles .Do you think classes or functions would be more efficient? Any advice in general is helpful. Sorry if that was too long but I am desperate...

Ok, I edited my original post and I share my full script. I hope this will give you some insight regarding my simulation. Thank you.

Additionally I add the two input files

parametersDiffusion_spher_shel.txt

parametersIONP_spher_shel.txt

First of all, excuse me my ignorance, but I don't know how to explain this (maybe the title of this question is not correct).

My program: I have created a class and its purpose is to create a table based on the parameters passed to the instantiated object (this connects to the database).

What I don't know how to do it: I need to access the position of my array (based on the values passed to me) within a for each.

What I did: If i type manually the values (usuario, apellido1, apellido2, email), my table is generated, but I'm trying to do this dinamically. I tryied with this line of code: $r->myObject->tableFields but I think, this, syntactically is not correct.

Code portion:

I'm attempting to create a 2D platformer with shooting mechanics in LC3 Assembly. Since this is from complete scratch, I also need to create the game engine. I have spent the past 4 hours creating a sprite library, and due to what I hope to be ignorance of a perhaps more efficient method, that means writing out the color data for each individual pixel in a 20px20p area for each sprite.

There's tons of info about Unicode codeunits, codepoints, etc, but I'm still a bit fuzzy about converting combined characters, graphemes, etc using byte-streams (required by libiconv).

Currently I'm only interested in converting between UTF-8/UTF-16/UTF-32 using libconv's iconv(), which expects the byte-lengths of both source and destination buffers as arguments.

Question: Is there a safe way to calculate fast the maximum possible bytes-length of the target buffer, based on the already known bytes-length of the source buffer?

Let's say for example, converting from u16buf to u8buf with a known u16byteslen (excluding 0x0000-termination if any). In the worst-case scenario, there will be 1 two-byte unit per codepoint in the UTF-16 source buffer, corresponding to a 4 single-byte units per codepoint in the UTF-8 target buffer. Is that enough to safely assume that the UTF-8 target buffer can never be longer than 2 * u16lenbytes?

I've actually experimented with that and seems to work, but I'm not sure if I'm missing corner cases involving combined characters and grapheme clusters. My doubts come from my ignorance regarding how those things are converted across these 3 different encodings. I mean, is it possible for a grapheme to need say 3 UTF-16 codepoints but like 10 UTF-8 codepoints when converted?

In that case, doubling u16lenbytes wouldn't suffice, right? And if so, is there any other straight forward way to pre-calc the maximum length of the target buffer?

I am not too terribly familiar with classes/class methods and how they work, and I know my code is atrocious! I wanted to dip my toe into the world of UI, and so I wanted to take a simple function I wrote in Python to see if I could create an app out of it. (Edit: The script produces a ":(" if today is not Monday, and a ":)" if today IS Monday.) (Double edit: this is my first post, I apologize for my ignorance re: coding and also Stack Overflow formatting.) We've got:

I'm new to R so forgive my ignorance. So, I created a basic horizontal barplot using barplot(). My text on the y-axis mostly disappears.

Is there a way to lengthen and display the text? This is my code:

Learning Python here, so sorry for any ignorance. Background - Assignment to make a tic tac toe game. Accomplished the goal, but trying to handle exceptions right now. At one point one of my variables is being passed with no type for some reason. The code in question is listed below choice is the variable in question and should be a list. The weird part is that it works as it should unless the user first chooses a spot on the board that has already been chosen and the failure then happens on the next iteration of the function.