Let’s try this, you have this array array = [ { “10:45” => 40, “11:00” => 40, “11:15” => 40, “11:30” => 40, “13:30” = >35, “14:00” => 40, “15:00” => 40 }, { “12:00” => 38, “12:45” => 39, “13:00” => 39, “13:15” => 39, “13:30” => 39 } ] Let’s remove the duplicate … Read more
You can do something like this : if ..something.. @posts = Post.where(..something..) else @posts = Post.where(..something..) end @posts = @posts.all(:order => ..something..) It’s better to do this, in Rails 3 : @posts = @posts.order(..something..) 1 solved Rails ActiveRecord methods in different places [closed]
Everywhere in your newly-created gem where it has module Pry, change it to: class Pry. Since Pry is already defined (as a class), you cannot redefine/reopen it as a module. solved Pry is not a module
a = [‘A’, ‘B’, ‘C’, ‘D’, ‘C’] target=”C” a.partition { |e| e==target }.reduce(:+) #=> [“C”, “C”, “A”, “B”, “D”] or a.select { |e| e==target }.concat(a.reject { |e| e==target }) #=> [“C”, “C”, “A”, “B”, “D”] a is not modified. 1 solved Reorder array based on passed in value
json(1.8.3) is not compatible with ruby 2.4.0. Try using a newer version. $ bundle update json 1 solved Upgrade ruby to 2.4.0
:symbol {key: value} When the colon is before the variable / object, it denotes a “symbol”, meaning a piece of data to be placed there. The symbol can typically be used in the likes of calling an attribute (key) or in part of a hash: @user.comment[:created_at] When the colon is after the variable / object, … Read more
You can use select method and join method to add “and” to each key. hash = {key1: true, key2: false, key3: true, key4: true} hash.select{|k, v| v}.keys.join(” and “) # => “key1 and key3 and key4″ 2 solved Concatinate preceding “and” for any key which is second or more [closed]
1.Why “rails” command is very slower than “ruby”? ruby invokes the Ruby interpreter, which is a compiled executable. rails invokes the Ruby interpreter plus loads many Ruby libraries that need to be located then parsed by the interpreter, before executing your Rails command. So rails –version will always take longer than ruby –version because it … Read more
The || operator is similar to the keyword or but is different from the keyword or in extremely important ways. Below are two great write-ups on the topic, comparing the two and showing you how to use either one: http://devblog.avdi.org/2010/08/02/using-and-and-or-in-ruby/ New version, with video: http://devblog.avdi.org/2014/08/26/how-to-use-rubys-english-andor-operators-without-going-nuts/ The most important thing to note in what Avdi says, … Read more
I just coded a node js code, you can still make it work on a browser in js, but you will need to download the underscore library here. _und = require(‘underscore’); data = [{ “id”: 1, “children”: [{ “id”: 7, “children”: [{ “id”: 8, “children”: [{ “id”: 4 }, { “id”: 5 }, { “id”: … Read more
You have an end on line 354 that I don’t think should be there, change this: break if guess>=7 i=i+1 end end to this: break if guess>=7 i=i+1 end 2 solved “Line 357: syntax error, unexpected kEND, expecting $end” [closed]
You need to set the associations between models After that, it could look like this: @students = @user.students.all where @user = current_user I guess. Edit: To make it failsafe: @students = @user.students.all if @user To avoid later problems set user only when its not set by the controller e.g in a user view: @user ||= … Read more
matches = [] File.readlines(‘data.txt’).each do |line| my_line = line.chomp.split(‘, ‘).map! { |l| l.split(/\s+(?=\d+$)/) }.flatten matches << [[‘player1’, ‘scope_p1’, ‘player2’, ‘score_p2’], my_line].transpose.to_h end p matches Example Here 3 solved Ruby CSV.readline convert to hash
def coffee_drink?(drink_list) %w(coffee espresso).any? { |drink| drink_list.include?(drink) } end or def coffee_drink?(drink_list) (%w(coffee espresso) & drink_list).any? end note that your version could be rewritten like this def coffee_drink?(drink_list) drink_list.include?(“coffee”) || drink_list.include?(“espresso”) end solved Is multiple include?() arguments in ruby possible?
OK, it’s not possible to help you with this directly as too much code is missing (and, frankly, it’s probably to much to just cut&paste it in here and expect people to debug it in their brains…). In cases like this, you have to figure out Which variable is nil Why is it nil In … Read more