Questions tagged [ruby]
Ruby is a multi-platform, open-source, dynamic, object-oriented, interpreted language created by Yukihiro Matsumoto (Matz) in 1993.
1,542
questions
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System Dependency Manager - Ruby
I recently got a prompt when looking for a job. To spare any details, the company decided not to get back to me, so because I did not get a code-review/feedback from them, I was wondering if someone ...
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vote
1answer
21 views
Statistical function which computes the average work time in different months
It's a task from a Ruby-course, in which I'm currently enrolled:
Ruby Course - Page
Precisely it's one of the assignments for the first week.
Following idea:
Your are given a list in which finished ...
0
votes
2answers
29 views
Ruby if block refactor from new synthax needed
I have this, I guess, new Ruby syntax in my method but Rubocop are warning me that the second last line is too long. Could you please help me to refactor this method?
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0answers
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Update join table using list of checkboxes in Rails
I have Gig and Singer Active Record models (standard--no customization just yet) with a many-to-many relationship through a ...
3
votes
1answer
41 views
Ruby price calculator for groceries
I am good at logic and most of the time I write working code. But I want to learn writing code which follows best practices and is very efficient. I tried to implement some of them in my code but it ...
2
votes
1answer
53 views
Table class to fill array structure with values
The code creates a table and adds rows and columns.
Does it make sense to write the code like this?
Would you design it differently?
Is there a better OOP approach to this?
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1
vote
1answer
18 views
Rails 5.2 callbacks to trigger score recalculation for relationships
I have a model that is in a HABTM relationship with 2 other models:
Activity.rb
...
0
votes
1answer
20 views
Enumerating AWS instances in Rails, with error handling
I have created a method, which is raising the same exception in case of any error:
...
3
votes
0answers
22 views
Rails route structure for managing tags
I'm hoping someone could vet my route structure as I've really been struggling with getting something that feels right. Right now I have this nested resource structure:
...
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vote
2answers
91 views
github page/ DHH Score Challenge in ruby
I wrote the following code which when executed prints the score of https://github.com/dhh.
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1answer
33 views
Re-creating user discounts nightly
I'm calling these two methods on a Worker that is executed every 24 hours at midnight in the background.
The code seems to be a little bit difficult to read and I'm not sure if i'm iterating through ...
1
vote
1answer
45 views
Getting the count of how many times a route has been hit
I have this log file (example below) and I'm trying to find the number of times a particular route is called.
Example log file:
...
11
votes
0answers
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Ruby chess engine gem
This is my first Ruby gem that claims to provide all the rules of the chess game. My goal was to keep this library as simple as possible via OOP principles, and I'd be glad to hear any feedback from ...
0
votes
1answer
35 views
Modular multiplicative inverse in Ruby
I implemented an algorithm to find the modular multiplicative inverse of an integer. The code works, but it is too slow and I don't know why. I compared it with an algorithm I found in Rosetta Code, ...
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vote
1answer
33 views
Ruby on Rails - Creating many models associated with another one
So I have the following models:
...
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0answers
25 views
Ruby exercise in writing and reading a file [closed]
I've been asked to improve the modular decomposition of the main by moving as many lines of code out of main as possible, but i have no idea how i should do this
...
3
votes
1answer
20 views
Ruby command to edit a field in a SAM file
Inspired by a bioinformatics question on Stack Overflow, I wanted to brush up on my Ruby knowledge, since I’ve been meaning to replace my command-line use of Perl by Ruby.
Briefly, the problem ...
1
vote
1answer
49 views
Rspec test for Rails method to return alphabetically sorted list of tags
I have one model class as listed here:
class Post < ActiveRecord::Base
has_many :comments
def tags
comments.map(&:tag).uniq.sort
end
end
and ...
3
votes
1answer
48 views
Adding an item to a hierarchical data structure
What I need to do is create a new object, modify it using a recursive function, then merge it with another object, and do this all in such a way that the values of the new object take precedence over ...
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vote
2answers
46 views
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0answers
30 views
Atbash cipher in Ruby
(Here's a REPL if you want to test it online: https://repl.it/repls/RecentMonstrousOffice)
I tried to implement the Atbash cipher in Ruby and this is my final code:
...
2
votes
0answers
38 views
Validating Amazon CloudFormation templates using Rspec
I have created an open source project that uses Rspec to validate the formatting of AWS::CloudFormation::Init YAML blocks in CloudFormation templates.1
My project is here.
Some general concerns:
Is ...
3
votes
1answer
48 views
(Ruby version) Rotate linked list to the right by k places
I saw this question (javascript - rotate linked list to the right by k places) the other day and I tried implementing it in Ruby in a totally different way. Here's the code (I also created a REPL if ...
5
votes
2answers
66 views
Vigenère cipher in Ruby
What I'm trying to do: implement the Vigenère cipher in Ruby. I already have a working version, but I want to make sure it is efficient and well-designed.
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2
votes
2answers
57 views
Keep ABC size down for conditional string concatenation in Ruby
This method takes a comment object and displays it correctly depending on what columns are available. EVENT_TEXT and REASON_TEXT ...
3
votes
1answer
128 views
Mars Rover challenge in Ruby
I have written a simplified version of the Mars Rover challenge in Ruby. Please review it for best coding practices.
A rover’s position and location is represented by a combination of x and y co-...
0
votes
1answer
27 views
Searching for combinations of words and numbers
My model called Customer contains a method called generate_fields which creates records based on its return values.
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4
votes
1answer
66 views
LinkedList Implementation
I have created a LinkedList in Ruby and was wondering if anyone had any input on efficiencies that I could add or deficiencies I could remove.
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vote
0answers
56 views
Rails dynamically changing parts of view but using the same method in controller
I have this update method which decides whether to update or recreate(same as update but resets the approval_status and create_date) of the building_approval object. I have the on_progress? method on ...
2
votes
1answer
69 views
Ruby Beginner - Fuzzy matching / string manipulation
There is no intended end use for this. It is for learning and development only.
I got carried away following an example and ended up with a miniaturised vehicle registration system. You can bulk ...
0
votes
0answers
37 views
ROR - Point of Sale (POS)
I've the following scenario: the user clicks the "Sales" button which redirects to the creation view of the Shopping Cart. Then, the user enters the EAN code and the Quantity, presses "Add" and the ...
3
votes
0answers
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Ruby - Core skills example project (command line vehicle registry)
There are no requirements for this project nor will it ever be used for any purpose.
I used this project to cement my knowledge of basic programming skills, I got bored copying the examples and felt ...
2
votes
1answer
22 views
Short analogue of Riffle[] accepting two blocks
I have an array of some elements that I need to loop through (i.e. execute some block A on each element) but between them I have also to "clean up" (block ...
2
votes
1answer
58 views
Sorting an assortment of strings and integers together, while keeping them separate
I put a solution to this coding problem together. The problem is this:
Create a function that takes an array, finds the most often repeated element(s) within it and returns it/them in an array. The ...
2
votes
0answers
96 views
Esoteric programming language in Ruby
I have recently created an esoteric programming language called 01 and I will be grateful for a code review and any opinions or suggestions about the future of this language.
GitHub
...
4
votes
1answer
92 views
Download a Git repo without .git folder
Coming from Python, JavaScript and PHP, I'd like to learn to write Ruby in the way it's "supposed to". Well-written Python code is called "Pythonic", so I'd like to know how idiomatic my Ruby code is.
...
0
votes
1answer
89 views
Arrays of hashes to hash
Task: convert this array of hashes:
animals = [
{"cats" => 3},
{"dogs" => 5 }
]
to this hash:
...
0
votes
0answers
37 views
Class to create and send a PDF form with attached documents
I'm currently working on building a class to create a PDF form application with attached documents and sending that file to an endpoint in Box Api. I have found extremely difficult managing ...
0
votes
1answer
30 views
Updating one model field based on the associated model's field
I'm wondering if there is any way we can optimize the following code.
Scenario is Library's active field should be ...
0
votes
1answer
41 views
Gomoku Game in Ruby
I learnt lots about ruby from my last post Game of Life in Ruby, so I have my next try in Ruby, it is Gomoku.
It is still an console game and I use three classes ...
5
votes
1answer
41 views
Scheduled file sorting with Ruby
I have a script running as an hourly cron job. It finds all screenshots on the Desktop and moves them to directories sorted by year/month/day.
On MacOS, screenshots are automatically saved to the ...
1
vote
1answer
192 views
Ruby on Rails quiz function
I have created a quiz function in my rails application. Since I want to track responses and make it a server-side application I created a table to record the responses of the questions people answer.
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5
votes
1answer
170 views
Game of Life in Ruby
I think Ruby is kinda interesting, so did this Game of life implement in Ruby. I am wonder is there is some magic in Ruby can let my code more elegant.
I am a python coder and I think my Ruby kinda ...
2
votes
1answer
49 views
Use of inheritance using two Ruby libraries
Currently I'm working on parsing data from a form service into a pdf form. I created 2 classes one inheriting from the other one. However, I see that the classes I created are growing in lines of ...
0
votes
1answer
46 views
Non-recursive factorial in Ruby
I've implemented a factorial function in a more "Ruby" way. I would like to get feedback on the algorithm.
...
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vote
0answers
45 views
TDD for Ruby On Rails API for group event items
I found myself working in this coding exercise for a work offer. I tried to apply TDD in the process but I didn't get any feedback from the company and I really would like to know what can be improved ...
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vote
0answers
37 views
A Ruby on Rails controller and JS code to add labels to products, like Gmail's labeling tool
My friend asked me to write a tool that lets users bulk add/edit labels (taxons) to store (spree commerce) products.
I came up with this, curious to know if you guys find the code readable/...
1
vote
1answer
49 views
Showing a message when the column is true
I'm making an app using Rails. I have 4 Boolean columns in a table like below, and I want to show a message if that column is true.
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2
votes
1answer
147 views
Offset vs Cursor Pagination
I am trying to compare any performance gain(s) from moving a current offset-based pagination endpoint to a cursor based one.
I have the following ruby code:
...
1
vote
2answers
64 views
Knapsack class in Ruby
This is a simple implementation of a knapsack written in Ruby. I've included all the relevant code here, but my question is concerning the contents setter ...
