How to merge YAML arrays?

Question

I would like to merge arrays in YAML, and load them via ruby -

some_stuff: &some_stuff
 - a
 - b
 - c

combined_stuff:
  <<: *some_stuff
  - d
  -         


        

Answer 1

If you only need to merge one item into a list you can do

fruit:
  - &banana
    name: banana
    colour: yellow

food:
  - *banana
  - name: carrot
    colour: orange

which yields

fruit:
  - name: banana
    colour: yellow

food:
  - name: banana
    colour: yellow
  - name: carrot
    colour: orange