yq/pkg/yqlib/doc/Keys.md

Get Keys

Given a sample.yml file of:

a:
  b: cat
  c: dog
  d: frog

then

yq eval '.a | keys' sample.yml

will output

3

Set key style

Given a sample.yml file of:

a:
  b: cat
  c: dog
  d: frog

then

yq eval '(.a | keys) style = 'single'' sample.yml

will output

a:
  b: cat
  c: dog
  d: frog