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JAVASCRIPTHTMLCSSPYTHONSQLJAVACPPCSHARPPHPTYPESCRIPTCRUBYGOSWIFTKOTLINRUSTRBASHSCALAOBJECTIVE-CDARTPERLLUAMATLABXMLJSONMARKDOWNASSEMBLYLATEXYAMLSOLIDITYBLOCKCHAIN

Topics

Introduction to YAML

What is YAMLYAML vs. JSON and XMLYAML Use CasesYAML File Extension

YAML Syntax Basics

YAML IndentationYAML CommentsYAML Key-Value PairsYAML StringsYAML NumbersYAML BooleansYAML Null Values

YAML Data Structures

YAML ListsYAML Nested ListsYAML DictionariesYAML Nested DictionariesYAML Complex Structures

YAML Advanced Features

YAML AnchorsYAML AliasesYAML Merge KeysYAML Block ScalarsYAML Folded ScalarsYAML Literal ScalarsYAML Multi-line Strings

YAML Data Types

YAML TimestampsYAML Binary DataYAML SetsYAML PairsYAML Omap

YAML Document Structure

YAML Multiple DocumentsYAML Document SeparatorsYAML DirectivesYAML Tags

YAML Best Practices

YAML Naming ConventionsYAML Formatting GuidelinesYAML Error HandlingYAML Version Compatibility

Working with YAML

YAML ParsingYAML GenerationYAML ValidationYAML in PythonYAML in RubyYAML in JavaScript

YAML in Configuration

YAML for App ConfigYAML in DockerYAML in KubernetesYAML in Ansible

YAML Security

YAML InjectionYAML Safe LoadingYAML Encryption

YAML Tools and Editors

YAML Online ValidatorsYAML IDE PluginsYAML Command-line Tools

YAML Key-Value Pairs

Key-value pairs are a fundamental concept in YAML (YAML Ain't Markup Language). They form the backbone of YAML's data representation, allowing you to structure information in a clear and readable format.

Understanding Key-Value Pairs in YAML

A key-value pair in YAML consists of two main components:

  • Key: A unique identifier for the data
  • Value: The corresponding data associated with the key

Keys and values are separated by a colon (:) followed by a space. This simple structure makes YAML an excellent choice for configuration files and data serialization.

Basic Syntax

Here's the basic syntax for YAML key-value pairs:

key: value

For example:

name: John Doe
age: 30
city: New York

Complex Values

YAML supports various data types as values, including:

Nested Structures

YAML allows for nested structures, creating more complex data representations:

person:
  name: Jane Smith
  age: 28
  address:
    street: 123 Main St
    city: Boston
    country: USA

Best Practices

  • Use clear, descriptive keys
  • Maintain consistent indentation (typically 2 spaces)
  • Avoid using special characters in keys
  • Use YAML comments to improve readability

Common Use Cases

Key-value pairs in YAML are widely used in:

Conclusion

Understanding key-value pairs is crucial for working with YAML effectively. They provide a simple yet powerful way to structure data, making YAML a popular choice for various applications in modern software development and DevOps practices.

For more advanced YAML concepts, explore YAML anchors and YAML aliases, which can help you create more efficient and maintainable YAML files.