memo
JSON -> YAML
cat foo.json | ruby -ryaml -rjson -e 'puts YAML.dump(JSON.load(ARGF))'
YAML -> JSON
cat foo.yml | ruby -ryaml -rjson -e 'puts JSON.dump(YAML.load(ARGF))'
Pretty Printする場合は
cat foo.yml | ruby -ryaml -rjson -e 'puts JSON.pretty_generate(YAML.load(ARGF))'