Ruby

Great Reads

Where in the World are my Facebook Friends?

by Marc Clifton

Locate your Facebook friends on a Google Map - A Ruby on Rails web application

Deploy Node.js Application Running on Microsoft IIS 10 To Docker's Windows Server Core 2016 Containers

by Arthur V. Ratz

In this brief article, we will demonstrate how to deploy a Node.js application and run it on Docker's Windows Server Core 2016 Containers

Using Rails Service Objects to Keep Code Clean

by Aleksandr Ulanov

What are Service Objects and how you can use them to make your app cleaner and keep it maintainable

On How to Mix Two Signals by using Spectral Forecast

by Paul Aurelian Gagniuc

This article shows how to mix two signals into a third, in variable proportions.

Latest Articles

Using Rails Service Objects to Keep Code Clean

by Aleksandr Ulanov

What are Service Objects and how you can use them to make your app cleaner and keep it maintainable

Building Responsive Rails Apps with Hotwire

by Aleksandr Ulanov

In this article, we'll go through the basics of Hotwire, as well as build a sample app using it.

On How to Mix Two Signals by using Spectral Forecast

by Paul Aurelian Gagniuc

This article shows how to mix two signals into a third, in variable proportions.

Security Vulnerabilities – How to Find and Fix Them

by datarockets

Finding a vulnerability, using it for data extracting from the database, and fixing it with just one line of code

All Articles

top

Ruby

Print the most repeating element in an array in ruby.

26 Sep 2022 by shri harshan

sample input: 7 1 2 3 2 2 3 4 sample output: 2 1) 1st line of input is the total number of inputs 'n'. What I have tried: number = gets.champ.to_ for i in 1..number num = gets.champ-to_i

Ruby

numbers

Print the most repeating element in an array in ruby.

26 Sep 2022 by OriginalGriff

Once you have fixed your code as recommended by CPallini, it's pretty easy to handle the second part, if you think about it. You need the most repeating value, so you need to count all of the identical values - which is complicated with random...

Ruby

numbers

Print the most repeating element in an array in ruby.

26 Sep 2022 by CPallini

Thisputs "how many items?" items = gets.to_i arr = Array.new(items,10) for i in 0..items-1 puts "please enter item #{i}" arr[i] = gets.to_i end should fix your code. Now it is up to you actually fulfilling the requirements.

Ruby

numbers

How to get outlet id which didn’t have at product migration table and show it at add page

24 Sep 2022 by Chang Zying

I’m new in Ruby on Rails, how can I get the outlet id which is not at the product migration table , because category id has at product migration table, I can get it through product but how outlet id? I want to get it and put at the add item there...

Ruby

Rails

How do I convert ruby codes to PHP slim

21 Sep 2022 by MSameer Asif

hi i was trying to convert code from ruby to PHP slim and want to send data from PHP slim with help of to Json $app->get('/order-info', function (Request $request, Response $response) { $session =...

Ruby

Javascript

PHP

How do I convert ruby codes to PHP slim

21 Sep 2022 by Richard MacCutchan

You will probably get a quicker answer from the Slim forum at Slim Framework[^].

Ruby

Javascript

PHP

Please give explanations for each lines of coding to understand by a beginner

20 Sep 2022 by Member 15773088

Hi This is a ruby programming. anyone help me with giving proper explanation step by step for this coding. I need explanations for each lines of coding. I am a beginner for programming. Here is the question Gosu Major Cycle Modify a simple...

Ruby

Please give explanations for each lines of coding to understand by a beginner

20 Sep 2022 by Richard MacCutchan

It is all explained at Index of Files, Classes & Methods in Ruby 2.5.3 (Ruby 2.5.3)[^]

Ruby

Please give explanations for each lines of coding to understand by a beginner

20 Sep 2022 by OriginalGriff

Do you have any idea how much work explaining code line by line is? Every single line needs a paragraph of explanation! For example: int next = r.Next(); Create a new variable called "next" which can hold a integer value. From...

Ruby

How do I send data with to json in PHP slim

20 Sep 2022 by MSameer Asif

hi i was trying to convert code from ruby to PHP slim and want to send data from PHP slim with help of to Json $app->get('/order-info', function (Request $request, Response $response) { $session =...

Hi please help me with this ruby programming question. Cant findout the error. Can anyone fix it?

20 Sep 2022 by Member 15773088

Question Gosu Major Cycle Modify a simple Ruby program to move a shape across the screen by modifying the tasks in the Gosu cycle update() and draw() methods. Enhance the code provided as follows:  Add a variable in the initialize() method...

Ruby

Hi please help me with this ruby programming question. Cant findout the error. Can anyone fix it?

20 Sep 2022 by OriginalGriff

Compiling does not mean your code is right! :laugh: Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the email...

Ruby

Using Rails Service Objects to Keep Code Clean

29 Aug 2022 by Aleksandr Ulanov

What are Service Objects and how you can use them to make your app cleaner and keep it maintainable

Building Responsive Rails Apps with Hotwire

11 Aug 2022 by Aleksandr Ulanov

In this article, we'll go through the basics of Hotwire, as well as build a sample app using it.

How can I fix this problem?

16 Jul 2022 by Member 15708384

Hello, I had some problems install ruby gem (mysql2) on Windows 10. I have installed "rubyinstaller-devkit-3.1.2-1-x64.exe". And I have installed required gem files for my ruby on rails development. But I can't install mysq2 gem because of error...

Ruby

Redis::cannotconnecterror error connecting to redis on redis:6379

20 Jun 2022 by Member 12214576

it's my first time using rails,redis and sidekiq,and I have been facing this error all day and didn't reach any solution , I saw a lot solutions to this error but it didn't work for me, so I don't know where's the problem when i try the end...

Ruby

Rails

Redis::cannotconnecterror error connecting to redis on redis:6379

20 Jun 2022 by Richard MacCutchan

https://dev.to/ben/nomethoderror-undefined-method-for-nil-nilclass-explained-422b[^].

Ruby

Rails

Why is ruby throwing me unexpected end of input

12 May 2022 by Tyrunt.new("Rix")

Oh, I just needed to add `end` in the `stick(place)` function!

Ruby

exceptions

Why is ruby throwing me unexpected end of input

12 May 2022 by Tyrunt.new("Rix")

Hello, coding guys, As you saw in the title, Ruby is throwing me: main.rb:59: syntax error, unexpected end-of-input, expecting `end' and, this is my code: # Logging puts "Hello, world!\n" # Input getting & variables puts "What is your name?"...

Ruby

exceptions

On How to Mix Two Signals by using Spectral Forecast

20 Mar 2022 by Paul Aurelian Gagniuc

This article shows how to mix two signals into a third, in variable proportions.

Javascript

Java

VB6

Linux by python...my dream

13 Feb 2022 by steveb

This is impossible. When machine first powers up, there are no Python interpretes on a BIOS level. There fore this cannot be written in Python. Maybe only after boot code was executed. But why would anyone want to write an OS in a slow...

Linux by python...my dream

13 Feb 2022 by آرین عباسی 67

I want to rewrite the Linux kernel written in C and Assembly and Ruby and Python programming languages and integrate it completely with Python. I need some help because I only know Python. I'm looking for a C, Assembly, Ruby, Shell programming...

Linux by python...my dream

12 Feb 2022 by Richard MacCutchan

You probably need to start by looking at the existing source code at GitHub - torvalds/linux: Linux kernel source tree[^].

Linux by python...my dream

11 Feb 2022 by Patrice T

Quote: I want to rewrite the Linux kernel Bad idea. If there is not millions of Linux written in everyone's favorite language, it is because it is huge and hard, and not every programming language is usable to build an OS. An OS talks to bare...

Linux by python...my dream

11 Feb 2022 by OriginalGriff

Forget it. Python needs an OS to work: it's an interpreted scripting language which needs the interpreter (which provides the framework for your app to run) to be executing before your app does. And that needs the OS beneath it to provide...

How to convert ruby codes into .net?

10 Jan 2022 by James_2012

Hi everyone.I'm a new programmer. I'm starting my new project on how to convert ruby codes into a .net framework. [language]. Would somebody help me start on this? Thanks

Ruby

.NET

Ruby intercalation between uppercase and lowercase

18 Oct 2021 by OriginalGriff

While we are more than willing to help those that are stuck, that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for...

Ruby

Ruby doubts about number and string

18 Oct 2021 by Member 15398339

I apologize for my english I'm not able to run the code, it says it must return a number since the constant is in string, how to proceed? def um_numero return um_numero.to_i What I have tried: I tried the to_i command but it didn't work

Ruby

Can someone please explain this ruby program line by line...i am a noob

5 Oct 2021 by Member 11164169

def group_by_owners(files) better_hash = Hash.new { |hash, key| hash[key] = [] } files.each_with_object(better_hash) {|(k, v), hash| hash[v] 'Randy', 'Code.py' => 'Stan', 'Output.txt' =>...

Ruby

Rails

Can someone please explain this ruby program line by line...i am a noob

5 Oct 2021 by OriginalGriff

Ruby

Rails

Minitest: an array of strings as an input, returns all elements from the array that are substrings of at least one of the other strings in the array

10 Sep 2021 by Richard MacCutchan

Ruby Community[^].

Ruby

Why does the error `an unhandled lowlevel error occurred. <Omitted> `occur? Even though I verified that SECRET_KEY_BASE is properly set up in linux.

5 Aug 2021 by Richard MacCutchan

Missing `secret_key_base` for 'production' environment - Google Search[^]

I can't verify that the environment variable “SECRET_KEY_BASE” is properly set in linux with this command: $ printenv | grep SECRET_KEY_BASE

27 Jul 2021 by Marchan4

My ruby version is 2.6.6, my mysql version is 8.0.23, my mysql2 version is 0.5.3, my bundler version is 2.2.21, my rails version is 5.0.7.2, and my Xcode version is 12.5. I use macOS Big Sur(version 11.4) and the text editor "Atom". I'm...

I can't verify that the environment variable “SECRET_KEY_BASE” is properly set in linux with this command: $ printenv | grep SECRET_KEY_BASE

27 Jul 2021 by Richard MacCutchan

$ export SECRET_KEY_BASE=GENERATED_CODE What is the $ sign in column 1 supposed to be for?

Security Vulnerabilities – How to Find and Fix Them

2 Jul 2021 by datarockets

Finding a vulnerability, using it for data extracting from the database, and fixing it with just one line of code

How can I connect to pervasive database in ruby on rails?

25 Apr 2021 by Member 13968986

I have installed Pervasive V10 server x86 and odbc gem. Whenever I make a request to fetch data from the database, I get the following error "IM003 (160) Specified driver could not be loaded due to system error 1114: A dynamic link library (DLL)...

Ruby

Rails

How to send/receive large data in ruby tcpsocket

6 Mar 2021 by Member 14915174

Hello, I may have asked the same question but in c++ not too long ago, sorry if I'm a bit noisy. so I got two function to send and receive large data from tcpsockets in ruby but I need help debugging. the problem is I tested these methods on an...

Ruby

sockets

"Plan must exist" error on site when filling out form for email

1 Mar 2021 by Sameerahmed786

Hello, I have been working on a personal project to build a website called DevMatch (course on upskill by Robeen Dey) and I have been having trouble as to why I am having an error that displays "Plan must exist" whenever I fill out an email form....

Ruby

AWS

A state is divided into R*C cities.the government has launched an initiative to find the cities which are dominated by coders.

25 Nov 2020 by Patrice T

Posting your homework is not a question. You show no attempt to solve the problem yourself, you have no question, your main effort is pasting the requirement, you just want us to do your HomeWork. HomeWork problems are simplified versions of the...

A state is divided into R*C cities.the government has launched an initiative to find the cities which are dominated by coders.

25 Nov 2020 by OriginalGriff

You're running late - the rest of your class was trying to get us to do this homework last week ... But I'll tell you what we told them: Quote: We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it...

Please help me tho solve the problem.

20 Oct 2020 by Member 14960261

Misty is fond of pokemons and likes to collect pokemon cards. She has P pokemon cards with her at present. She wants to have a particular number of cards on the Dth day. Her friend Ash is ready to help her to achieve the number. Ash will provide...

Java

Ruby

C++

Please help me tho solve the problem.

11 Oct 2020 by Member 14961422

def main(): n=int(input()) for i in range(n): li=list(int(i) for i in input().strip().split(' ')) p=li[0] N=li[1] d=li[2] for i in range(d-1): mul=(d-1)*N ans=mul+p ...

Java

Ruby

C++

Please help me tho solve the problem.

9 Oct 2020 by Patrice T

First of all, the languages you list are to tell everyone which language the question is about. def main(): n=int(input()) for i in range(n): li=list(int(i) for i in input().strip().split(' ')) P=li[0] N=li[1] ...

Java

Ruby

C++

Please help me tho solve the problem.

9 Oct 2020 by OriginalGriff

We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us...

Java

Ruby

C++

Railway station - given schedule of trains and their stoppage time at a railway station, find minimum number of platforms needed.

9 Aug 2020 by Member 14910806

import java.util.*; class Railway { public static void main(String[] args) { int p = 1, res = 1, i = 1, j = 0; Scanner sc = new Scanner(System.in); int N = sc.nextInt(), d; int arr[] = new int[N]; int dep[] = new...

Railway station - given schedule of trains and their stoppage time at a railway station, find minimum number of platforms needed.

8 Aug 2020 by Patrice T

When posting a question about a challenge from a site, it is a good idea to post a link to the page, as every word in requirement can matters. Quote: i want full solution And I want to win lottery grand price. Quote: well i try to write some...

Railway station - given schedule of trains and their stoppage time at a railway station, find minimum number of platforms needed.

8 Aug 2020 by Sandeep Mewara

Okay, so if read the requirement here: Quote: Given schedule of trains and their stoppage time at a Railway Station, find minimum number of platforms needed what is expected or would help here is to find maximum trains present at a given point...

Railway station - given schedule of trains and their stoppage time at a railway station, find minimum number of platforms needed.

8 Aug 2020 by OriginalGriff

Quote: i try to write some function but it didn't work it properly.i want full solution Not going to happen. We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the...

'ORA-06413: connection not open' only in rails server

19 Jul 2020 by Member 14892170

I'm pretty new in rails. I've a problem with Oracle. I always get ORA-06413: Connection not open error from oracle when I run the rails server I'm using this configuration ruby '2.6.3' gem 'rails', '~> 5.2.3' gem 'pg', '= 0.18.1' gem...

Ruby

'ORA-06413: connection not open' only in rails server

19 Jul 2020 by Sandeep Mewara

First off, with the error you get, it is not related to Rails here. It's plain simple error related to Oracle that indicates something wrong with the database connection. Now, given the error code, seems handful of information on web/Google for...

Ruby

Coding student in need of advice for ruby methods & default arguments lab

21 Jun 2020 by Afzaal Ahmad Zeeshan

I think it is because the testing software is configured to accept only a specific result, as you can see in the following code: Failure/Error: expect($stdout).to receive(:puts).with("Hello Kent Beck!") You can fix this by removing the extra...

Ruby

DefaultValue

Coding student in need of advice for ruby methods & default arguments lab

21 Jun 2020 by michellekadiehl

I have spent over an hour trying to figure out how to solve the error, but nothing works. Here is the error message: say_hello accepts an argument of a name and prints out Hello with that Name (FAILED - 1) defaults to Ruby Programmer when...

Ruby

DefaultValue

What are some common scenarios to use ** operator?

30 Mar 2020 by OriginalGriff

The ** operator just returns X to the power of Y: X ** Y 2 ** 2 = 4 2 ** 3 = 8 10** 2 = 100 So the only place you use it is ... when you want a number raised to a power: the square for example, or the cube.

Ruby

What are some common scenarios to use ** operator?

30 Mar 2020 by yebaha

I'm learning ruby on rails. what are some common scenarios to use ** operator? What I have tried: I'm working through a tutorial ,and it is mentioned that during initilization we can use **operator , of a class. I'm want to know how to use this.

Ruby

Setting Up CI for this Site with Bitbucket Pipelines and SSH

28 Feb 2020 by Christian Specht

After years of executing a “build and upload per FTP” batch on my machine, I now have a GitHub Pages-like experience when updating this site..

How can I changue URL in redmine code (ruby on rails)

8 Nov 2019 by Member 14471936

First of all sorry for my poor english. It's my first time working with ruby on rails and i don't have so much idea. I have a redmine proyect mounted in a virtual machine, i can access to it writting my ip an it works. But the problem is when i want to enter from an external link, (i have my...

Ruby

Rails

A TCL-TK Form Generator

30 Sep 2019 by Member 4206974

A Tcl -Tk Form Generator that can be used alone or used to provide a fast Form generation for language in which this activity can be complex

How get SHA1 computehash data in ruby

9 Jun 2019 by bigyan sahoo

Hi, I am new in ruby. I will give here one example in .NET. The same encryption data I need in ruby. .Net Code-: using (SHA1 sha = new SHA1CryptoServiceProvider()) { byte[] computeHash = sha.ComputeHash(enc.GetBytes(plainText + "." + ConfigKey)); } First it...

Ruby

.NET4.6

How get SHA1 computehash data in ruby

9 Jun 2019 by Richard MacCutchan

sha1 ruby - Google Search[^]

Ruby

.NET4.6

Eslint on VSC editor problem...

19 May 2019 by Jayson741

Eslint rules says use single quotes but upon autosave it corrects this to double quotes which then comes up as an error.... I've followed the Eslint rules on https://eslint.org/docs/rules/quotes but the autosave function refuses to accept this... this also goes for extra semi and spacing ...

Ruby

vue.js

Eslint on VSC editor problem...

19 May 2019 by Gerry Schmitz

Start here: Single quotes are sometimes replaced with double quotes even when "prettier.singleQuote: true" is specified · Issue #2338 · prettier/prettier · GitHub[^]

Ruby

vue.js

Rails:argumenterror in methodtypes#edit

3 Apr 2019 by Member 14200783

This is my index.html.erb This is my edit.html.erb:

Ruby

Rails

Rails: uninitialized constant methodtypecontroller

29 Mar 2019 by Member 14200783

I just started my rails. I try to set routes but my controller format has an underline. Therefore I do not how to write route. What I have tried: This is my controller file name: method_types_controller.rb This is what I have tried on my route: Rails.application.routes.draw do # For...

Ruby

Rails

What is Serverless, and Why Should You Care?

4 Mar 2019 by Ryan Peden

A brief overview of what Serverless is, and why giving it a try is worth your time.

How do I append text behind a certain keyword in filename in ruby?

28 Jan 2019 by Member 14132591

I have to add a text to a filename in Ruby in order for a job to know which files to be picked up in the directory. For example in directory C:\Users\Scripts, I may have files named: 2A_Apple_VC_20180101.txt 2A_Apple_VC_20180201.txt 2A_Apple_VC_20180301.txt etc. How can I insert the phrase...

Ruby

Ruby (1.8.1) -- ERRNO::EEXIST file exists

15 Dec 2018 by Akin0

Okay, so the problem actually was -- Ruby cannot stand checking the names that have other characters than English alphabet in itself. That was actually pretty hard to come up with, but I guess this is the solution.

Ruby1.8

Ruby

Ruby (1.8.1) -- ERRNO::EEXIST file exists

14 Dec 2018 by Akin0

Hello, So I am working with Ruby, and... I have an error "ERRNO::EEXIST, text line 2 ... File exists" The error occurs if a directory it created (defined in EGGPATH) already exists, which should work in itself because of "unless File.exist?(EGGPATH)" While what I'm trying to do is: def cyhm ...

Ruby1.8

Ruby

Ruby (1.8.1) -- ERRNO::EEXIST file exists

12 Dec 2018 by Richard MacCutchan

You most likely should use Dir.exist, not File.exist to check for a directory.

Ruby1.8

Ruby

Build Issue with Ruby in macOS --- Bundler Installation and Bootstrap `docs` Script Run

10 Dec 2018 by YasIkeda

I needed Ruby in order to run `npm run-script docs` in Bootstrap's project, but the command failed in macOS 10.14.2. It was because Bootstrap's site seems to be created with Jekyll, which works on Ruby, and Ruby installed by default or with XCode did not work well for this purpose.

Typewriter.NET Text Editor

9 Nov 2018 by Сергей Челноков

How to write your Notepad

Having trouble finding the directory folders as stated above without an error coming up

10 Sep 2018 by mcne65

require "net/ssh" require 'net/ssh/shell' require 'capistrano/rails' require 'sshkit' require 'sshkit/dsl' include SSHKit::DSL @hostname = "lwa1001.env-10-100-222.iagcloud" @username = "admin" @password = "password1" @cmd = "ls -la" res = "" ssh = Net::SSH.start(@hostname, @username,...

Ruby

testing

Define an index in ruby equal to nil and return false

2 Sep 2018 by Member 13969616

I am trying to define a method that checks if a given space on the board is empty and address the scenarios that qualify as an empty space that isn't equal to the literal " ". My tests failed to produce false/true, and instead provided nil. What I have tried: board = [" ", " ", " ", " ", "...

Ruby

Define an index in ruby equal to nil and return false

2 Sep 2018 by Member 13969616

def position_taken?(board, index) if board[index] == " " || board[index] == nil || board[index] == "" return false elsif board[index] != " " return true end end Thank you for your help, I ended up finding this solution worked and what the problem was by seeing how you interpreted my code.

Ruby

Deploy Node.js Application Running on Microsoft IIS 10 To Docker's Windows Server Core 2016 Containers

1 Sep 2018 by Arthur V. Ratz

In this brief article, we will demonstrate how to deploy a Node.js application and run it on Docker's Windows Server Core 2016 Containers

Define an index in ruby equal to nil and return false

1 Sep 2018 by Patrice T

Quote: My tests failed to produce false/true, and instead provided nil. The reason is that your code do not cover all cases. Try something like this: board = [" ", " ", " ", " ", " ", " ", " ", " ", " "] def position_taken?(board, index) if board[index] == [" "] || nil # not sure what this...

Ruby

How I can compile java , C++ , Python , PHP & ruby on rail at once ?

29 Aug 2018 by KarstenK

I think you can, but you will have a bunch of more basic problems like writing the code and testing. You must dig in all documentations of the languages and work out some command line build process like for instance in Java and glue all in one big batch which triggers the others. This only...

How I can compile java , C++ , Python , PHP & ruby on rail at once ?

29 Aug 2018 by Питер Каликс

Can I compile Java ,C++ , Python ,PHP & Ruby On Rail at Once ?? And Can i build web application using these all Programming Languages at Once?? What I have tried: I haven't tried ever.Cause of confusion .I want to Compile Or built a web application using Java ,C++ , Python , PHP & Ruby on...

How I can compile java , C++ , Python , PHP & ruby on rail at once ?

29 Aug 2018 by Jochen Arndt

Short answer: You can't. All these languages are build differently. C++ for example is compiled to executable code for a specific platform. Other languages are full interpreted (an interpreter is "compiling" at run time to executable code) or semi interpreted (the compiler creates a platform...

Hey guys which language would be best for building billing software

31 Jul 2018 by Patrice T

Quote: Which language would be best for building billing software. Since all languages are almost on par, your answer is the language you are most familiar with. Quote: I want to build a billing software for my college project and maybe I would also try to sell them. I want to add features like...

Python

Ruby