I am trying to run though a program and dynamically assign elements using the builder methods. While stepping through my procedure I am attempting to dynamically assign elements using variables. I have attempted a few options to have this variable pass though into the element but it is not working.
I originally started by building my data in a hash however in my full procedure I have duplicate keys, so i had to move to something more direct.
is it possible to achive my desired effect using builder
require 'builder'
x = Builder::XmlMarkup.new(:target => $stdout, :indent => 1)
x.instruct!
x.character do
stats = "health, mana, armor"
stats.split(",").each do |stat|
key = stat.strip.downcase
value = rand()
x.key value
end #end do
end #end do
Output
C:\Projects>ruby test.rb
<?xml version="1.0" encoding="UTF-8"?>
<character>
<key>0.1405191069855357</key>
<key>0.3484226234753265</key>
<key>0.4658284443108096</key>
</character>
Desired output
C:\Projects>ruby test.rb
<?xml version="1.0" encoding="UTF-8"?>
<character>
<health>0.1405191069855357</health>
<mana>0.3484226234753265</mana>
<armor>0.4658284443108096</armor>
</character>
require 'builder'
x = Builder::XmlMarkup.new(:target => $stdout, :indent => 1)
x.instruct!
x.character do
stats = "health, mana, armor"
stats.split(",").each do |stat|
key = stat.strip.downcase
value = rand()
x.__send__(key, value)
end
end
you can used ruby object method send or its alias __send__.
But since, send word can also be used for its key, only __send__ is exposed for use to the object.
The doc for the mentioned methods:
https://ruby-doc.org/core-2.6.5/Object.html#method-i-send
Invokes the method identified by symbol, passing it any arguments specified. You can use
__send__if the name send clashes with an existing method in obj. When the method is identified by a string, the string is converted to a symbol.
Just make sure to try limiting the scope of its usage since it's a powerful method, it can easily break stuffs.