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Using variables in ruby erb variables


Using variables in ruby erb variables

By : Oktaviani Zen
Date : November 21 2020, 04:01 AM
around this issue Edit: An easier way would be to make a normal array instead of a percent literal. [@addhostgroup, @addservicegroup].each do |action|. Sometimes I over look the little things :)
You can use instance_variable_get along with the array and iteration into action that you have setup.
code :


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Ruby is storing classes inside of local variables instead of instance variables

Ruby is storing classes inside of local variables instead of instance variables


By : E Y
Date : March 29 2020, 07:55 AM
Does that help Declaring @cv outside the tests makes it an instance variable for TestConverter - not an instance of TestConverter!
Probably the easiest way to get around that would be to make it a class variable: @@cv.
code :
class Foo
  @x = 3
  def initialize
    @y = 4
  end
end

puts Foo.instance_variables
puts Foo.new.instance_variables
In Ruby, can I hand off variables from within a method without making new global variables?

In Ruby, can I hand off variables from within a method without making new global variables?


By : user3471157
Date : March 29 2020, 07:55 AM
Any of those help I'm doing a game creation exercise from Learn Ruby the Hard Way. It's themed after Destiny since that's what I've got on the brain at the moment. , You can create a class and use instance variables:
code :
class Game
  def initialize
    @might = 1
    @agility = 1
    @intellect = 1
  end
  attr_reader :might
  attr_reader :agility
  attr_reader :intellect
  def start
    puts "Make all decisions by pressing the corresponding number."
    puts "Choose your class:"
    puts "1. Titan"
    puts "2. Hunter"
    puts "3. Warlock"

    print "> "
    choice = $stdin.gets.chomp


    case choice 
      when "1"
        @might = 3
        puts "You've chosen Titan!"
      when "2"
        @agility = 3
        puts "You've chosen Hunter!"
      when "3"
        @intellect = 3
        puts "You've chosen Warlock!"
      else
        puts "Try again."
        start
    end
  end
end
game = Game.new
game.start

puts "Might: #{game.might}"
puts "Agility: #{game.agility}"
puts "Intellect: #{game.intellect}"
In Ruby, copying very large local variables to instance variables duplicates memory requirement

In Ruby, copying very large local variables to instance variables duplicates memory requirement


By : nobody
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , There's no duplication here, just references–that doesn't duplicate the data.
Duplication implies creating clone/copy of the large structures. Referencing the data again adds only that new reference.
Static variables versus eigenclass class variables, what's the difference in Ruby?

Static variables versus eigenclass class variables, what's the difference in Ruby?


By : Tom Johns
Date : March 29 2020, 07:55 AM
wish helps you They are both class variables but in an instance you can access only @@store variable.
Mind that class variables are not thread safe in Ruby, so use Mutex if you plan to use varaible as a Hash.
Are Ruby class variables similar to the Java static variables?

Are Ruby class variables similar to the Java static variables?


By : NeedALotofHelp
Date : March 29 2020, 07:55 AM
will be helpful for those in need There's a lot of similarity between Ruby and Java by virtue of them being object-oriented, but their family tree is different. Ruby leans very heavily on Smalltalk while Java inherits from the C++ school of thinking.
The difference here is that Ruby's concept of public/private/protected is a lot weaker, they're more suggestions than rules, and things like static methods or constants are more of a pattern than a construct in the language.
code :
$ugly_global = 0  # Not recommended, could conflict with other code
                  # Ownership of this variable isn't made clear.

$ugly_global += 1 # Works, but again, it's without context.

module UglyCounter    # Defines a module/namespace to live in
  def self.current    # Defines a clear interface to this value
    @counter ||= 0    # Initializes a local instance variable
  end

  def self.current=(v)   # Allow modification of this value
    @counter = v.to_i    # A chance to perform any casting/cleaning
  end
end

UglyCounter.current += 1   # Modifies the state of a variable, but
                           # the context is made clear.
class MessyClass
  @@shared = 0

  def counter
    @@shared
  end

  def counter=(v)
    @@shared = v
  end
end
class CleanerClass
  def self.counter
    @counter ||= 0
  end

  def self.counter=(v)
    @counter = v.to_i
  end

  # These are reduced to simple bridge methods, nothing more. Because
  # they simply forward calls there's no breach of authority.
  def counter
    self.class.counter
  end

  def counter=(v)
    self.class.counter = v
  end
end
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