[feature] merge two *yaml.Node-s API?

[sitano]

What do you think of adding Merge(dst, src *yaml.Node) that will be able to merge mapping node keys instead of replacing them? Something like https://github.com/sitano/go-yaml-merge.

foo:
    a: 1
    b: 2

+

foo:
    b: 3
    c: 4

===

foo:
    a: 1
    b: 3
    c: 4

I think lots of users will benefit from having this function in std lib.

[wrouesnel]

+1 to this. Most of the code already exists to support merge nodes, but there's no way to do something like

newNode := node.Merge(otherNode, nextOtherNode)

(where I imagine the precedence ordering would travel left to right (i.e. left most takes priority)

[ccoVeille]

This sounds like a good feature to add.

Feel free to open a PR

[sitano]

The draft is here #353. I would love you to take a look first so we can discuss if the approach looks appealing to you where to move forward.