Ruby Yaml Tutorial

Yaml stands for yaml ain t markup language.

Ruby yaml tutorial.

Yaml has broad language support and maps easily into native data structures. So using the yaml syntax we have easily listed the data we will need to feed to our application. This yaml tutorial will demonstrate the language syntax with a guide and some simple coding examples in python. What is yaml used for in all my tutorial videos for docker kubernetes ansible etc.

Yaml data is portable between programming languages. So you ve got all these tasty ruby objects lying around in memory and they re going to be lost when your program ends. The design goals and features of yaml are given below matches native data structures of agile methodology and its languages such as perl python php ruby and javascript. Pyyaml yaml 1 1 pure python and libyaml binding ruamel yaml yaml 1 2 update of pyyaml with round tripping of comments pysyck yaml 1 0 syck binding strictyaml restricted yaml subset r.

As you ll see below yaml can handle many common data types and structures. The yaml acronym was shorthand for yet another markup language. R yaml libyaml wrapper ruby. Psych libyaml wrapper in ruby core for 1 9 2 rbyaml yaml 1 1 pyyaml port yaml4r yaml 1.

It is far nicer than xml. It is easier to read by humans than json and can contain richer meta data. In fact it can be used with nearly any application that. I ve used yaml for the example configuration files because yaml has actually become a widely used format for writing configurations files.

Yaml is a flexible human readable file format that is ideal for storing object trees. I have posted a newer tutorial which is probably going to be more useful to you than this one. This version of the yaml cookbook focuses on the ruby implementation of yaml by comparing yaml documents with their ruby counterparts. Value pairs yaml structure.

The configuration yaml file is the main yaml file used by home assistant to gather all of the information about the users desired configuration. One of the reasons for its popularity is that the language is human readable intuitive and flexible. There are libraries available for all mainstream languages including ruby python c java perl c. Yaml includes a markup language with important construct to distinguish data oriented language with the document markup.

Yaml in ruby tutorial. Now just save this file as config yaml. Our yaml tutorial includes all topics of yaml such as what is yaml yaml syntax yaml data types yaml styles in which the yaml program will be written the mapping of key. Welcome to the yaml cookbook for ruby.

It is like one big settings page only the options are stored in a written list rather than by a bunch of switches and check boxes. Now we have the config yaml all that we have to do is use it in our program say you are writing a python program that uses this config file and installs the software. Yaml tm is a readable text format for data structures.