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Ruby Method Name Interpolation


Ruby Method Name Interpolation

By : Neha Bhandari
Date : November 21 2020, 01:01 AM
This might help you I am trying to reduce the amount of code in on of my Ruby Classes by Iterating through a constant hash in order to produce al the wanted methods with a reduced amount of coding. , Here is the example for you:
code :
ENTRY_HASHES = {
  "disbursement" => {
    :description => 'smth'
  }
}

ENTRY_HASHES.each do |key, value|
  define_method("#{key}?") do |argument|
    puts "#{key}? method called with #{argument}"
    puts "you can use hash values: #{value} of course"
  end
end

disbursement?('my_arg')
disbursement? method called with my_arg
you can use hash values: {:description=>"smth"} of course


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Is there a way to override Ruby's default string interpolation behavior with a method?

Is there a way to override Ruby's default string interpolation behavior with a method?


By : lj5128
Date : March 29 2020, 07:55 AM
I hope this helps you . With what version of Ruby are you seeing these results? This works correctly for me with Ruby 1.9.2 and 1.8.6:
code :
class Foo
  def to_s
   'hi mom'
  end
end

puts "#{Foo.new}"
#=> hi mom
Ruby's send method with block variable interpolation

Ruby's send method with block variable interpolation


By : Darren LIANG
Date : March 29 2020, 07:55 AM
I wish did fix the issue. It's not "invoking the value of the iterator", but instead calling a method with that name. In this case because of the attr_accessor declaration, these methods map to properties.
Calling object.send('method_name') or object.send(:method_name) are equivalent to object.method_name in general terms. Likewise, send(:foo) and foo will call the method foo on the context.
Ruby interpolation can't be read inside raw method in Rails 3.1

Ruby interpolation can't be read inside raw method in Rails 3.1


By : Santanu
Date : March 29 2020, 07:55 AM
will be helpful for those in need Interpolation only works inside double quoted strings, not single quoted ones. Use double quotes, and escape you inner double quotes or replace them with single ones:
code :
"<div class='#{provider.name}_sprites'>&nbsp;</div>"
Ruby: how to use gsub method on symbol inside string interpolation #{}

Ruby: how to use gsub method on symbol inside string interpolation #{}


By : user3144801
Date : March 29 2020, 07:55 AM
it helps some times It's true that within string interpolation, a single symbol will be stringified.
code :
>> s = :hello
=> :hello
>> "#{s}"
=> "hello"
>> "#{s.gsub('u','e')}"
NoMethodError: undefined method `gsub' for :hello:Symbol
    from (irb):3
    from /usr/local/bin/irb:11:in `<main>'
ruby apply method to string interpolation

ruby apply method to string interpolation


By : Pragya Dhir
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I want to convert a neg number to a pos in ruby so am using the abs method. , Like this:
code :
puts("You are #{(playerGuess - num).abs} away")
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