80 lines
1.1 KiB
Markdown
80 lines
1.1 KiB
Markdown
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---
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categories:
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- Programming_Languages
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tags: []
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---
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# Guide to YAML
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- Data description language
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- Alternative to XML and JSON
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- Easy to read by humans and process by code
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## Main rule
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> Never use tabs for indentation, use two spaces
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## Available data types
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- strings
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- numbers
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- booleans
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- arrays
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- maps (key, value pairs)
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### Example
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````yaml
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# Basic scalar data types
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age: 51
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greeting: Hello, world
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length: 182.3
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happy: true
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``
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```yaml
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# array
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pets:
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- cat
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- dog
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# nested array
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pets:
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- cat
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- dog
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- staffy
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- pitty
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````
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```yaml
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# map
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languages:
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- java: advanced
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- python: average
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- javascript: basic
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```
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### Strings
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- Don't have to use quotes unless string contains reserved YAML characters (dashes, colons etc)
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- Can use single or double quotes
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### Multi-line text
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Two methods:
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```yaml
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# Literal block preserves new line characters
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literal_block: |
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Lorem ipsum dolar sit avcc lorem dolar
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Blah blah
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Blah
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```
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```yaml
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folded_block: >
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Each different line
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will be folded back on itself so you don't
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have to keep scrolling to the right
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```
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