Questions tagged [ruby]
Ruby is a multi-platform, open-source, dynamic, object-oriented, interpreted language created by Yukihiro Matsumoto (Matz) in 1993.
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Ruby-function for reading, parsing a text-file, removing data-duplicates
Task description:
Implement a generate_unique_phone_numbers function.
The function shall parse the given text-file.
Content-example:
...
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3
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Print last lines of file
Task
Write a Ruby function, which accepts a path to a text file and returns a string consisting of the last n lines in reversed order, separated by commas.
Example input file:
...
- 4,212
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The simple calculator in Ruby
I wrote the simple calculator in Ruby. This is my first program in this language. I've switched recently from Python to Ruby. What do you think about my work? Thanks
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- 311
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3
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Ruby FizzBuzz using the ternary operator two times
Task: Implement a function which loops from 1 to 100 and prints "Fizz" if the counter is divisible by 3. Prints "Buzz" if the counter is divisible by 5 and "FizzBuzz", ...
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Changes hash to allocate values as directed
Let's say you have a hashmap of sub-systems that a spaceship is currently directing power to and a second hash of sub-systems where the power should now be directed to.
Create a function that returns ...
- 125
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1
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Write a simple, clean error message without a backtrace and exit on failure
I want to write on failure to either STDOUT or STDERR a clean, simple error message for the user, without the (verbose) ...
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2
answers
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Ruby SFTP client
I'm on Ruby for three weeks and now I want to learn more.
Please review this SFTP client and suggest any necessary changes.
...
user270282
3
votes
1
answer
47
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Solution to Codejam 2022 1C (Letter Blocks) in Ruby
The following is my solution to the Letter Blocks problem from Codejam 2022: https://codingcompetitions.withgoogle.com/codejam/round/0000000000877b42/0000000000afe6a1.
Problem
It is a rainy day, so ...
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2
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2
answers
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Solution to a competive programming contest (Codejam 2011 1A)
The following is my solution to the killer word problem from Codejam 2011: https://codingcompetitions.withgoogle.com/codejam/round/0000000000433198/0000000000432fe2. In summary, we're playing Hangman. ...
- 287
1
vote
1
answer
147
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Open a file, with a fallback path if it doesn't exist at one location
I am parsing a file that exists in either app/components/ui or in app/components. If the one in the first dir (...
- 248
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votes
2
answers
89
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Parse a document and returning uniqueness and total number occurrences
I am parsing a document and returning
(1) uniqueness, and
(2) total number occurrence.
I believe my code can still be subjected to review. I would like a review of my code as I have even made it too ...
- 149
4
votes
2
answers
493
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battleship game with two ships per player
I'm creating a battleship game in Ruby.
Let me explain how it works:
The game is played on 5x5 grids (one per player).
Players have 2 ships each to place on their grid. A small ship (3x1 side) and a ...
- 41
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0
answers
96
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Ruby OOP Mastermind Game Code Refactor
I have finished The mastermind game. Basically, it's a game that has 2 sides, codebreaker or codemaker. If you are a codebreaker, you are guessing the colour code that the computer has chosen. If you ...
4
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2
answers
120
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Ruby CLI TicTacToe
I have done Tictactoe game in Ruby. It is my first Object Oriented project in Ruby. I would like to separate all program into a few classes such as Player Board and Game. I want to use more OOP best ...
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75
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Code for appending to a certain index of an array
I have a collection which, after the code has ran, looks something like the following:
...
- 343
1
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1
answer
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Rails controller to handle offers and payments for rental housing
I've been adding stuff a bit "blindly" to my controller and currently everything is working as it should, but the controller is gotten very messy. I'm using the gem ...
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votes
1
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179
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RSpec: Compound Expectations
It's an exercise from a RSpec-course, which I'm currently doing.
Task:
Create a compound expectation, which asserts the string sportscar starts with the substring "sports" and ends with the ...
- 4,212
1
vote
1
answer
139
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User registration API
Would love some feedback on this simple API implementation with Ruby on Rails. Have I used proper naming conventions, readable/manageable code, optimal approaches, etc? As I'm still learning Ruby on ...
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4
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2
answers
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Jekyll plugin which bundles files into a zip archive
I am not a Ruby developer but cold-reading existing Jekyll plugins I implemented one to bundle files in a zip archive and open sourced it on GitHub.
What do I need to fix to make it look more Ruby-...
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votes
1
answer
75
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Migration in a bioinformatics application that changes a column name and explains the rationale
This very short piece of code is a migration in which a column name is changed to be more descriptive. It is part of a larger bioinformatics application written in RoR that parses the output of ...
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2
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202
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Refactoring Ruby recharge REST API wrapper by using class variables
I am trying to create an API wrapper for recharge (A Shopify subscription service), I am using the HTTParty gem
...
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Library Program in Ruby with Class
I have been learning Ruby for 2 weeks. Today my bootcamp teacher taught Ruby Class and gave me homework. I coded simple library program. But I think the code is smelling bad. How can do better the ...
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2
answers
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Number guessing game in Ruby
I am a newbie in Ruby. I want to learn Ruby and I want to learn clear code in Ruby. I coded a number guessing game but my code is smelling bad. How I can do better code?
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2
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How can I make BalanceService PORO I wrote better of any code smell? [closed]
I wrote this method which I think is not effective as it doesn't respond to the missing method when I use the PORO Class.
BalanceService
...
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1
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2
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Querying and rendering an HTML table of ISP performance statistics
I have multiples measurements and I want to render it into tables like this
Measurements
Operator
browsings
FTP DL
FTP UL
Location
Event
Date
Operator
avg
min
max
avg
min
max
avg
min
max
Verizon
...
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342
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3
votes
1
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219
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Reshape hash of hashes into array of modified hashes without using nested each?
My goal is to write more idiomatic ruby when working with nested data structures. More specifically, I need to break my habit of looping through everything with ...
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2
votes
1
answer
156
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Singleton in Ruby without using Singleton module or class variable
When I need a singleton class in my Ruby code (for example, single logger for multiple classes) I usually use code like this:
...
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1
vote
1
answer
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Group some given users according to their department
I have wrote following solution for one answer but I want to refactor to make it more simple and readable.
I am receiving params
...
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2
votes
2
answers
154
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Finding minimum steps required to traverse from source to terminal
Hello everyone this is my first post here so please do critique my post if there's anything.
I have made a program intended to pass a programming challenge on open.kattis.com, here.
It should do as ...
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3
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Advent of Code 2020, Day 10 in Ruby
I'm an amateur programmer making a career change into web development. I've found Advent of Code challenges are great way to sharpen my skills. I've cleaned up this solution for Day 10, 2020 as much ...
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2
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224
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Insertion Sort Implemented in Ruby
I'm a new programmer and I'm periodically going into the Intro To Algorithms CLRS textbook and trying to translate pseudocode into Ruby for skill practice. This is my implementation/translation of ...
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3
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Ruby: possible Poker holds for a hand of length n
Hello everyone and thanks in advance for taking the time to read my post!!
In the process of learning Ruby, I'm writing a video poker machine that analyzes hands represented by arrays of Cards, like ...
josh-frank
1
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0
answers
163
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Addition/subtraction of Ruby arrays
Let's say I have this array.
items = [
{
amount: 100,
add: true
},
{
amount: 50,
add: false
},
{
amount: 100,
add: true
}
]
...
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2
votes
1
answer
188
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How can I make this CSV Importer code better of any code smell?
I wrote this method a few years ago in a Ruby on Rails project, which I think I am not proud of. How can I make this code better to show in-depth professionalism in Ruby?
lib/merchant/web_csv_importer....
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4
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1
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100
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Generating product variants in Ruby
Based on the sample variants, I need to get all combinations of all variants. In the example I have 3x3x2=18 variants.
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1
vote
1
answer
64
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Ruby Symbol Table implementation using Binary Search
I'm currently going over Robert Sedgewick's Algorithms book. I implemented a Symbol Table using two parallel array one for keys and one for values. The keys array is ordered and the Symbol Table uses ...
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1
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What changes can I make to simply this function that groups parameter key value pairs
I am writing a function that can be used in a ruby script that will match the parameter and values together so the script can use them in an intelligent way. The idea is if you were to run a script ...
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1
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Idiomatic Ruby if/else in a Sinatra route
Apologies if this question doesn't fit the format here, seemed more appropriate here than SO due to the more nebulous nature of the question.
Think mini tinyURL clone: POST to service to save the url +...
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1
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Ruby: Database Authentication Module
I have created a module that validates the credentials against different databases.
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3
answers
228
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Better way to count the number of occurrences of a maximum number in the array in Ruby
I am trying to write a program to get the count of the maximum number in an array of integers. The below code is what I have written. Is there any better way to write this code in Ruby?
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1
vote
2
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293
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Ruby Hangman Game
I'm still new to coding and self-taught. If anyone could take a look at my code for my Ruby Hangman game and give any tips or advice whatsoever, it would be greatly appreciated. I'm trying to improve!
...
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-2
votes
1
answer
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Getting account status from a client [closed]
I have the following Ruby method.
def get_status(creds)
client = create_client(creds)
status = client.account_status
client.close_session
status
end
...
- 117
2
votes
1
answer
225
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Priority Queue implementation for top k frequent elements leetcode in Ruby
While working on the following leetcode problem: https://leetcode.com/problems/top-k-frequent-elements/ I used a Priority Queu implementation in Ruby. I have learned how to implement a Priority Queu ...
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2
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Reverse the words, move the vowels and downcase everything
I'm brand new to Ruby.
The function takes in a string of any number of words, and reverses the order of the words. Also, for each word, it takes the vowels and moves it to the end of the word. It also ...
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2
votes
2
answers
292
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Ruby Mastermind game project with AI
I'm self-learning and pretty new to coding and created a Mastermind game in Ruby.
Any general feedback or advice whatsoever would be greatly appreciated.
The game is completely functional right now, ...
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1
vote
1
answer
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Should methods be inside classes? in Ruby
I have coded more in Python but I am learning Ruby now. So I am trying to write a solution to create a family_tree and add and get relationships. The code below is ...
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2
answers
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Return nil after loop and also in unless block in Ruby
I have a working code as below. Is there any better way to return nil after the each loop and ...
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1
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Correct way to define variables and methods in Ruby [closed]
I am trying to write a Person class in Ruby which has some methods and properties. The below is how I have implemented it now.
...
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