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YAML

  

null

  

Empty value from YAML data

 

Description

Examples

Compatibility

Description

• 

The YAML format contains a value null to represent missing data. The YAML:-null symbol in Maple is used to represent YAML null symbols after import into Maple.

• 

The commands YAML:-ParseString and YAML:-ParseFile may produce output which uses YAML:-null.

• 

The YAML:-ToString command recognizes YAML:-null and translates it to null in YAML.

Examples

Parse a YAML string containing null data.

YAML:-ParseString("[2,3,null,5,null,7]");

2,3,YAML:−null,5,YAML:−null,7

(1)

Generate a YAML string containing null data to signify missing information.

Beowulf := table([ "title" = "Beowulf", "language" = "Anglo-Saxon", "author" = YAML:-null ]);

Beowulftablelanguage=Anglo-Saxon,title=Beowulf,author=YAML:−null

(2)

YAML:-ToString( Beowulf );

--- author: null language: "Anglo-Saxon" title: Beowulf

(3)

Compatibility

• 

The YAML[null] command was introduced in Maple 2017.

• 

For more information on Maple 2017 changes, see Updates in Maple 2017.

See Also

NULL

YAML