ruby,ruby-on-rails-4 , Get X days out of an Array

## Question:

Tag: ruby,ruby-on-rails-4

I have an array filled with Datetime objects:

[Mon, 22 Jun 2015, Tue, 23 Jun 2015, Wed, 24 Jun 2015, Thu, 25 Jun 2015, Fri, 26 Jun 2015, Sat, 27 Jun 2015, Sun, 28 Jun 2015]


I know how to select what I want from the array ex:

week.select{|x|x.monday? || x.wednesday?}


But now when I try to write a method to select days from the array, I can't seem to figure out how to pass these methods to the select statement:

ex:

def get_days(wkn, desired_days*)
get_week = Model.week(2)
get_days_of_week = get_week.select{|x|x.desired_day[monday]?|| x.desired_day[sunday]}
end


any ideas?

desired_days would be a user saying that they want mon. and sun. so mon, sun will get passed in as desired_days the method will get a full week range and then I want select out the desired days.

I would do:

def get_days(wkn, *desired_days)
get_week = Model.week(2)
get_days_of_week = get_week.select { |x| desired_days.include? x.strftime("%A") }
end


# Related:

## What is Rack::Utils.multipart_part_limit within Rails and what function does it perform?

ruby-on-rails,ruby,rack,multipart
Rack::Utils.multipart_part_limit is set to 128 by default. What purpose does the value have and what effect does it have within the Rails system?...

## Can't map a range of dates in Ruby/Rails

ruby-on-rails,ruby
I'm trying to map a range of dates and pass them to my view as an array, as follows: from, to = Date.parse("2014-01-01"), Date.yesterday date_range = (from..to) @mapped_dates = date_range.map {|date| date.strftime("%b %e")} I reference them in some JS in my view as follows: dateLabels = <%= raw @mapped_dates.to_json %>;...

## Rails - link_to path based on object's name + refactoring multiple custom actions

ruby-on-rails,ruby,refactoring
I'm looking to simplify the link_to path based on thr object's name and also am looking into refactoring multiple custom actions. I've managed to get this working below. <% ServiceMenu.all.each do |menu| %> <tr class=" <%= cycle('odd', 'even') %>"> <td><%= link_to menu.name, ("tech/""#{menu.name.parameterize}") %></td> </tr> <% end %> I feel...

## Showing and editing has_many objects in Rails

ruby-on-rails,ruby-on-rails-4
I'm trying to do something that I imagine to be very basic, but I'm very new to Rails and am not sure what sure what I'm doing wrong. I've gone through several tutorials and searched for an answer and can't find what the issue is. Would appreciate any help! I've...

## Same enum values for multiple columns

ruby-on-rails,ruby,enums
I need to do something like this: class PlanetEdge < ActiveRecord::Base enum :first_planet [ :earth, :mars, :jupiter] enum :second_planet [ :earth, :mars, :jupiter] end Where my table is a table of edges but each vertex is an integer. However, it seems the abvove is not possible in rails. What might...

ruby-on-rails,ruby,rest,activerecord,one-to-many
I'm creating a rails application that is a backend for a mobile application. The backend is implemented with a RESTful web API. Currently I am trying to add gamification to the platform through the use of badges that can be earned by the user. Right now the badges are tied...

## Ruby gsub group parameters do not work when preceded by escaped slashes

ruby,regex
I am trying to perform a trivial substitution, that in any other language I have come across, work as per the documentation. However, my substitution fails for some reason. The documentation examples list: "hello".gsub(/[aeiou]/, '*') #=> "h*ll*" "hello".gsub(/([aeiou])/, '<\1>') #=> "h<e>ll<o>" "hello".gsub(/./) {|s| s.ord.to_s + ' '} #=> "104 101...

## In Ruby how to put multiple lines in one guard clause?

ruby-on-rails,ruby
I have the following line of code : if params[:"available_#{district.id}"] == 'true' @deliverycharge = @product.deliverycharges.create!(districtrate_id: district.id) delivery_custom_price(district) end Rubocop highlight it and asks me to use a guard clause for it. How can I do it? EDIT : Rubocop highlighted the first line and gave this message Use a guard...

## rendering the partials in controller after the validation check

ruby-on-rails,ruby-on-rails-4,model-view-controller
I have two partial views for two different sign up forms. On my home page , based on the link one clicks on, I'm rendering respective form.(views/application/index) = link_to 'Mentor', new_user_path(user_role: true), :class =>'btn' = link_to 'Mentee', new_user_path, :class =>'btn' In views/users/new.html.haml , I'm checking the user role and redirecting...

## Using the Rails console to delete odd-numbered records

ruby-on-rails-4,command-line,console
I'd like to delete records with odd numbered ID's from Hero table using the Rails console. Would someone be so kind as to suggest a way for me to do this? Kind Regards, Ryan...

## Get the actual value of a boolean attribute

ruby,page-object-gem,rspec3,rspec-expectations
I have the span: <span disabled="disabled">Edit Member</span> When I try to get the value of the disabled attribute: page.in_iframe(:id => 'MembersAreaFrame') do |frame| expect(page.span_element(:xpath => "//span[text()='Edit Member']", :frame => frame).attribute('disabled')).to eq("disabled") end I get: expected: "disabled" got: "true" How do I get the value of specified attribute instead of a...

## Get X days out of an Array

ruby,ruby-on-rails-4
I have an array filled with Datetime objects: [Mon, 22 Jun 2015, Tue, 23 Jun 2015, Wed, 24 Jun 2015, Thu, 25 Jun 2015, Fri, 26 Jun 2015, Sat, 27 Jun 2015, Sun, 28 Jun 2015] I know how to select what I want from the array ex: week.select{|x|x.monday? ||...

## Loop until i get correct user

ruby,redis
I have users stored in Redis and want to be able to call only certain subsets from a set, if i don't get the correct user back i want to put it back in the set and then try again until i get one of the desired users @redis =...

## Stack level too deep because recursion

I have a model named Tweet. The columns of the Tweet model are: -id -content -user_id -picture -group -original_tweet_id Every tweet can have one or multiple retweets. The relation happens with the help of original_tweet_id. All the tweets have original_tweet_id nil , whilst the retweets contain the id of the...

## Appending an element to a page in VoltRb

html,ruby,opalrb,voltrb

## Split an array into slices, with groupings

arrays,ruby,enumerable
I've got some Ruby code here, that works, but I'm certain I'm not doing it as efficiently as I can. I have an Array of Objects, along this line: [ { name: "foo1", location: "new york" }, { name: "foo2", location: "new york" }, { name: "foo3", location: "new york"...

## How to handle backslash “\” escape characters in q string and heredocument

ruby
Ruby Newbie here. I do not understand why Ruby looks inside %q and escapes the \. I am using Ruby to generate Latex code. I need to generate \\\hline which is used in Latex for table making. I found \\\hline as input generated \hline even though the string was inside...

## Rails shared controller actions

ruby-on-rails,ruby,ruby-on-rails-4
I am having trouble building a controller concern. I would like the concern to extend the classes available actions. Given I have the controller 'SamplesController' class SamplesController < ApplicationController include Searchable perform_search_on(Sample, handle: [ClothingType, Company, Collection, Color]) end I include the module 'Searchable' module Searchable extend ActiveSupport::Concern module ClassMethods def...

## Rails - How to find tilt version?

ruby-on-rails-3,ruby-on-rails-4,sprockets,tilt
Gem tilt is used with sprockets for Rails assets precompile. We are having hard time to find the version running on our Rails 4 app as tilt --version returns version unknown: \$ tilt --version tilt: version unknown tilt --help give no info about how to find version. Is there way...

## Heroku RAM not increasing with upgraded dynos

ruby-on-rails,ruby,ruby-on-rails-3,memory,heroku
I have a massive function i have been calling manually through the heroku rails console. I have been receiving the error rapid fire in my logs: 2015-06-22T14:56:42.940517+00:00 heroku[run.9877]: Process running mem=575M(112.4%) 2015-06-22T14:56:42.940517+00:00 heroku[run.9877]: Error R14 (Memory quota exceeded) A 1X dyno is suppose to have 512 MB of RAM. I...

## On rendering from controller, current_page method does not seem to work

ruby-on-rails,ruby,ruby-on-rails-4,model-view-controller
I have a navigation bar included in application.html.erb. Because for some pages, such as the signup page, I need to place additional code inside the navigation bar, I have excluded those pages for showing the navigation bar through application.html.erb and instead included it in their respective view pages. See code...

## Devise emails are not being sent using sendgrid while other emails are being sent well

ruby-on-rails-4,heroku,devise,sendgrid
I am using sendgrid to send emails in production my all other emails are being sent as expected but all the devise emails are not being sent neither a crash occur my in my production.rb I have config.action_mailer.raise_delivery_errors = false config.action_mailer.default_url_options = { :host => 'myapp.herokuapp.com' } config.action_mailer.delivery_method = :smtp...

## For loop with flexible stop variable

ruby
I need to write a loop for x in (1..y) where the y variable can be changed somehow. How can I do that? For example: for x in (1..y/x) But it does not work. ...

## Rails Association Guidance [on hold]

ruby-on-rails,ruby,ruby-on-rails-4,ruby-on-rails-3.2
I am new to rails 4. I have gone through lots of tutorials and trying to solve below scenario. But still no success. Can anybody point me in the right direction. How to handle associations for below scenario. Scenario: 1. Patient can have many surgeries. 2. Surgery has two types...

## regex to pull in number with decimal or comma

ruby,regex
This is my line of code: col_value = line_item[column].scan(/\d+./).join().to_i When I enter 30,000 into the textfield, col_value is 30. I want it to bring in any number: 30,000 30.5 30.55 30000 Any of these are valid... Is there a problem with the scan and or join which would cause it...