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YAML Sequence Style

YAML Sequence Style​

YAML Sequences Styles are closely related to the concept of collections.

The collection in YAML is represented with proper sequence styles.

note

Collections in YAML are indexed by sequential integers starting with zero as represented in arrays.

danger

Sequence Style is a collections-specific style in which the block style or flow style is alternately used!

Example​

The following code shows how to represent a sequence style, comparing block style and flow style:

# Ordered sequence of nodes in YAML STRUCTURE
Block style: !!seq
- Mercury   # Comment.
- Venus     # Comment.
- Earth     # Comment.
- Mars      # Comment.
- Jupiter   # Comment.
- Saturn    # Comment.
- Uranus    # Comment.
- Neptune   # Comment.
- Pluto     # Comment?
Flow style: !!seq [ Mercury, Venus, Earth, Mars,      # Comment
                    Jupiter, Saturn, Uranus, Neptune, # Comment
                    Pluto ]                           # Comment

The JSON output of the given YAML is as follows:

{
    "Flow style": [
        "Mercury",
        "Venus",
        "Earth",
        "Mars",
        "Jupiter",
        "Saturn",
        "Uranus",
        "Neptune",
        "Pluto"
    ],

    "Block style": [
        "Mercury",
        "Venus",
        "Earth",
        "Mars",
        "Jupiter",
        "Saturn",
        "Uranus",
        "Neptune",
        "Pluto"
    ]
}
note

Note how Block Style and Flow Style are converted in the same JSON output.

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