RUBY QUESTIONS

How do I create a Class using the Singleton Design Pattern in Ruby?

hope this fix your issue The singleton pattern is a design pattern that is used to restrict instantiation of a class to one object instance. Although I know how to code the singleton pattern in C++ and Java, I was wondering if anyone know how to impl

TAG : ruby

Date : January 22 2021, 04:47 PM , By : Tony Z

How do I update Ruby Gems from behind a Proxy (ISA-NTLM)

I hope this helps . I wasn't able to get mine working from the command-line switch but I have been able to do it just by setting my HTTP_PROXY environment variable. (Note that case seems to be important). I have a batch file that has a line like this

TAG : ruby

Date : January 22 2021, 04:47 PM , By : joshski

How do I run Rake tasks within a Ruby script?

should help you out from timocracy.com:

TAG : ruby

Date : January 22 2021, 02:12 PM , By : Lex Viatkine

Mapping values from two array in Ruby

Hope that helps @Michiel de MareYour Ruby 1.9 example can be shortened a bit further:

TAG : ruby

Date : January 22 2021, 02:12 PM , By : Morbo

Reverse DNS in Ruby?

seems to work fine I'm in an environment with a lot of computers that haven't been properly inventoried. Basically, no one knows which IP goes with which mac address and which hostname. So I wrote the following: , I would check out getaddrinfo. If yo

TAG : ruby

Date : January 22 2021, 02:12 PM , By : dyarborough

Why is aws-sdk-ruby connecting to '169.254.169.254' on initialization?

fixed the issue. Will look into that further It is trying to connect to the AWS metadata server to get the AWS credentials. All AWS servers should be able to connect to the internal metadata server.

TAG : ruby

Date : January 12 2021, 08:33 AM , By : Pat

Rspec: Using Let with context correctly?

it should still fix some issue let by itself doesn't get called unless you use it with ! as let!. Without ! let behaves as method definition so it won't get used before you call it in it block. let! will get called before each it example similar to b

TAG : ruby

Date : January 11 2021, 03:32 PM , By : Bobblegate

Algorithm for ‘spreading` sum in Hash

I hope this helps you . This solution could be a starting point, I didn't test for avoiding infinite loop:

TAG : ruby

Date : January 11 2021, 03:32 PM , By : B3CFT

Capybara 'visit' is not considering '#' character in URL?

I wish this help you UPDATE Actually after thinking about this a while it would probably do what you want if you did visit 'login' since the fragment passed in visit would get merged over the app_host fragmentCapybara visit doesn't just append to app

TAG : ruby

Date : January 11 2021, 03:26 PM , By : alchemist

Call a Rake task repeatedly

I wish this help you rake is OSS, btw.Rake::Taskinvoke checks that the task was not previously invoked and early returns if it was. I do not know much about rake, but resetting this instance variable should do the trick.

TAG : ruby

Date : January 11 2021, 11:39 AM , By : techthumb

ruby selenium execute_script Net::ReadTimeout

around this issue Small thing first - there is no need to load capybara-webkit if you're using the Selenium driver. Now onto the main issue. There is no need to call methods directly on driver when executing JS, rather you should just be calling the

TAG : ruby

Date : January 10 2021, 02:06 PM , By : Elwillow

Right usage of ruby global variable $*

I wish this help you I was wondering the right usage for global variable $*. , That's because it has the wrong type. Try this:

TAG : ruby

Date : January 10 2021, 01:47 PM , By : IanM

ruby-debug19: Can't get working with Ruby 1.9.1p376

To fix this issue I'm trying to use ruby-debug19 with Ruby 1.9.1p376 but am getting the following error: , Try just

TAG : ruby

Date : January 10 2021, 01:45 PM , By : Jim F.

How to retrieve caller context object in Ruby?

With these it helps Came across this post while looking for an answer for my own purposes.Didn't find one that was appropriate, so I dug through the Ruby source and put together an extension. I've bundled it as a gem- should install without any probl

TAG : ruby

Date : January 10 2021, 01:45 PM , By : user179271

Conditionally assign return value of functions in one line

I wish this helpful for you Not sure why you want to do this but this is valid ruby code and both methods will get called

TAG : ruby

Date : January 08 2021, 10:52 AM , By : Funkwarrior

I want to convert translation curl command to ruby

Does that help I want to using google translation v3 REST api in ruby, but I couldn't include authentication. , Solved by the following method:

TAG : ruby

Date : January 07 2021, 07:50 AM , By : orneka

Create inner-class object after executing outer-class's constructor in Ruby?

around this issue Nested modules and classes in Ruby are a mostly organizational choice. Compare this

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Henry Fatino

Implement a ruby method to find the next largest number with the same digits of the input number in ruby

help you fix your problem Implement a ruby method to find the next largest number with the same digits of the input number. Ex: 38276 would return 38627. , It wouldn't be the fastest one, but does the job!

TAG : ruby

Date : January 02 2021, 06:48 AM , By : dlouzan

Is there a way to create dynamic variable names in Ruby?

Any of those help If I create a student class and each time a new student object is created, how do I dynamically create a new variable name to distinguish between the different students? I don't know how many students there will be. , All you need i

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Grant

Detect <,>, >=,<= operators in Ruby and use in .where method (no active record)

Hope that helps Well, even ActiveRecord uses string representation for such an option: .where('amount > 5') It might be easier for AR to do so, as it can pass directly to the database. In your case, you'll have to parse the string, find the operator

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Rit Li

How do we talk about classes that do not inherit from the `Class` class in Ruby?

With these it helps You can treat all classes are instances of Class in the Ruby world. Worth remembering that everything in ruby is an object, including classes. Yes BasicObject is the top parent class of all classes in Ruby. The class of BasicObjec

TAG : ruby

Date : January 02 2021, 06:48 AM , By : user116330

Sum of first nth term of series

I hope this helps you . When you have expression like z = x/y, in ruby it does specify type for output based on operand provided for division. If x y both are integer, output calculated is also integer and float value is removed.So to obtain output

TAG : ruby

Date : January 02 2021, 06:48 AM , By : dlouzan

Space before first word after .join array to string

hope this fix your issue The reason you're seeing the extra space is because arrays in ruby are 0 indexed, so you have an nil array element because your first insert is a index 1

TAG : ruby

Date : January 02 2021, 06:48 AM , By : dbarbot

How to make alias_method in Ruby use the sub-class' custom method?

I wish this helpful for you This is because alias_method treats self at runtime.Edit As @Jörg commented, my solution can cause some troubles depending of your application (multithreading environment…). The to_s implementation like you suggested is pr

TAG : ruby

Date : January 02 2021, 06:48 AM , By : fedorafennec

Can I specify a duck type in method signatures?

I hope this helps . But what I'd like to know (and didn't find in the docs) is: can I describe the duck type? Like we can do in YARD, for example:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Pepe Araya

Ruby BCrypt salting/hashing seems ... wrong?

wish of those help 1) Salt is necessary for verification, and thus must be stored alongside the hashed cyphertext. Whether it's two fields in a database or one smushed-together string, is immaterial.2) One salt = one rainbow table. Sure, attacker cou

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Richard Laksana

Not getting expected answer

To fix this issue Code not returning the correct answer. , Try this.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : user180941

Sorbet asking a `sig` for `attr_reader`

may help you . The error does not have to do with the attr_reader method itself needing a sig, but with :collection_name. The signature for attr_reader is already known, but the new method it dynamically creates, collection_name does not have a known

TAG : ruby

Date : January 02 2021, 06:48 AM , By : nseibert

key: value vs key :value in ruby?

should help you out This isn't about convention, it's about syntax.:something is a Symbol.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : antonio

Ruby dig set - Assign values using Hash#dig

should help you out You can create a hash that behaves like what you want. Hash.new takes a block which is invoked whenever a key lookup fails. We can create an empty hash when that happens:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Julian Ivanov

How to determine big O Time complexity of array difference in Ruby

Hope this helps How do I determine big O Time complexity of array difference in Ruby? , My question is how does array_2 - array_1 work

TAG : ruby

Date : January 02 2021, 06:48 AM , By : unfool

How to resolve Rubocop error 'Favor `format` over `String#%`'

Hope that helps I am trying generate the mac address using following code, but robocop is throwing a warning , Just change

TAG : ruby

Date : January 02 2021, 06:48 AM , By : lwl_seu

Blocks in Ruby, Error:Wrong Number of arguments

around this issue You basically have two calls to power without any reason (I’d wild guess you expected kinda currying there, but it’s not how currying is done in ruby.) The first call to power with a block does not pass any argument, while both regu

TAG : ruby

Date : January 02 2021, 06:48 AM , By : todor

Reassigned hash changes the original hash

I think the issue was by ths following , Why is variable a getting changed and how do I prevent it? , Why is variable a getting changed and how do I prevent it?

TAG : ruby

Date : January 02 2021, 06:48 AM , By : dlouzan

rspec hooks(before and after) is not working

I hope this helps you . The before is not running because you have no examples - these are built with the it command:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : smbrant

Next-ing from child each loop in Ruby

I hope this helps you . TL;DR use break.Here is the MCVE:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Adam

convert byte to string in rails

hope this fix your issue You are overcomplicating things. I have no idea what the leading b in data literal is supposed to mean, but this would work:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Boyer C.

What does the ruby ? method do?

will be helpful for those in need ? is not a method in this case but rather a parsable syntax. ? is a character literal in this contextDocs Excerpt:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Brian Cupps

ruby code error: '+'no implicit conversion of Integer into String

this will help Don’t put spaces between method names and opening parentheses in the first place.The cause of the error one cannot add numbers to strings, ruby prevents implicit coercion. One might use string interpolation:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : user161380

How to run the simplest unit test

To fix this issue I just want to run a unit test, but I must be missing something from the documentation. From what I read, just running this file with "ruby" should execute my test, however nothing happens. What must I be missing?! , ohh the name of

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Myatus

How do I update controller param to accept nested attributes with rails?

I wish this helpful for you I am working on a rails app, I was wondering how to update controller params to accept nested attributes with rails, this is the existing controller;

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Yolanda N. Ceron

How does the method reference operator .: work?

I hope this helps . The method reference operator .: is simply syntactic sugar for Objectmethod just like the function call operator .(). is simply syntactic sugar for call.Thus, the use cases for the method reference operator are the exact same ones

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Keniwan

How to "magically" add code to all public class methods in ruby?

will be helpful for those in need If by repetition you mean the listing of methods you want to instrument, then you can do something like:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Yohan Lee

Trying to AND all elements in a list of lists

I wish did fix the issue. I'm trying to create a new list of elements by ANDing the lists in my list of lists.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : terrestrial

How can I assign a variable the largest 32 bit signed value in ruby without explicitly defining it

fixed the issue. Will look into that further I want to be able to assign a variable the number 2147483647, the maximum 32-bit signed integer value. Is there some way that I can retrieve a value from the class, such as Integer::MAX? , In CRuby 2.5 and

TAG : ruby

Date : January 02 2021, 06:48 AM , By : cmhudson

I'm trying to convert a value to an integer what am I doing wrong here?

may help you . I'm just trying to make this code work and I keep getting: , I believe you have to use to_i to convert the string into an integer.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : toki

Why do I get syntax errors when I deploy capistrano?

around this issue The path of your error message looks like you are using Ruby 2.0 and version 1.6.0 of the i18n gem. The i18n gem uses the squiggly heredoc syntax (

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Jet Thompson

When is it a good idea to define a static ruby class?

I wish this helpful for you What you are saying is that you want to use classes as nothing more than namespaces for pure functions.There's nothing wrong with this, and you can use ruby this way, but you'll be going against the grain of the language i

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Sigfrieg

How to find the number of unique occurrences for an Array in Ruby

help you fix your problem I have an array, containing n amount of elements. Each element contains two words. , One liner option:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : francisco santos

In Sinatra, how to render json?

around this issue Because the latter case assumes you're calling json method with a block, and foo: 'bar' is an invalid statement. I.e.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : ranja

why do I have to reference the method instead of the @variable?

this one helps. The effect you are seeing is because you only assign the instance variable @pin inside the pin method.That is, it wasn't until you called pin in your comparison, that it got set. When you tried to use @pin directly, it had not yet bee

TAG : ruby

Date : January 02 2021, 06:48 AM , By : user98832

How to get table name for a simple Sequel Dataset object?

it fixes the issue If you want the first table in the dataset, you can use ds.first_source.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : user143038

ruby exact number log (logarithm) function

Hope this helps You have encountered a limitation of floating point numbers here. Floats typically have a precision of 15 decimal places in Ruby, but the value 2.9999999999999996 shows 16 decimal places of (unreliable) precision.To get back to a reli

TAG : ruby

Date : January 02 2021, 06:48 AM , By : chawei

Hexdecimal to String Convert - Ruby

I hope this helps . I'm trying to convert hexadecimal to string using Ruby and it does not work with some Chinese characters. I am new to Ruby. , It's already hex-dumped UTF-8.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Ashaea

Spreadsheet::Workbook.new creates .xls instead of xlsx

Any of those help You may want to use the roo gem instead as it supports XLSX format. It's also more well supported as the spreadsheet gem has not been updated in 5 years, and spreadsheet gem does NOT support XLS format.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : Sid

How to split a long number into pairs of digits

it should still fix some issue I think there is no need to use a regexp, I would do something like this:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : LUK

Ruby/Minitest Spec: How to test that a method returns a value within a given array?

Any of those help Before I offer you a solution, I want to unravel some details about the Spec DSL and Minitest. The must_include methods is the Spec DSL expectation for the assert_includes assertion. That method has the following signature:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : meodudang

Ruby Enumerable#count performance issue in algorithm

wish of those help In your version, you indeed do not use count. Instead you do something worse. You still iterate the string (in letter_occurrence) and you also are building a hash (that's the extra work).Ruby's Stringcount (that the other version i

TAG : ruby

Date : January 02 2021, 06:48 AM , By : John Bentley

Ruby library to parse strings into the appropriate data type Google Sheets-style

wish helps you The possible date formats must be specified. Were one to use Dateparse, the string "Theresa May has announced she will resign" would return .Here's a start.

TAG : ruby

Date : January 02 2021, 06:48 AM , By : akr

Chaining method blocks (Ruby)

help you fix your problem If you don't want to have a intermediate variable and want to do it in a single line, you can write something like this:

TAG : ruby

Date : January 02 2021, 06:48 AM , By : keird