Sequences (Lists) 📋¶

YAML sequences (also known as lists) are ordered collections of values. They are used to represent data structures like arrays and lists in a simple and readable format.

Basic List¶

Sequences are defined using a dash (-) followed by a space for each item in the list.

yml
fruits:
  - 🍎 Apple
  - 🍌 Banana
  - 🍒 Cherry

Each item in the list starts with a -
Items are indented for clarity (optional but recommended).

Nested Lists¶

You can nest lists within lists to represent more complex data structures.

yml
favorites:
  - colors:
      - 🔴 Red
      - 🟢 Green
      - 🔵 Blue
  - numbers:
      - 1️⃣ One
      - 2️⃣ Two
      - 3️⃣ Three

The favorites key contains a list of nested lists (colors and numbers).

Lists of Dictionaries¶

Lists can contain dictionaries (mappings), which is useful for representing structured data.

yml
employees:
  - name: chaitu-ycr
    age: 30
    department: 🛠️ Engineering
  - name: ycr dummy
    age: 25
    department: 📈 Marketing

Each item in the employees list is a dictionary with name, age, and department keys.

Mixed Lists¶

Lists can contain different types of items, such as strings, numbers, and booleans.

yml
mixed_list:
  - "String" 📜
  - 42 🔢
  - true ⚖️
  - null 🌀

The mixed_list contains a string, an integer, a boolean, and a null value.

Lists with Multiline Strings¶

Lists can include multiline strings using block or folded scalars.

yml
notes:
  - >
    This is a folded string 📄
    in a list item.
  - |
    This is a block string 🖋️
    in a list item.

The first item uses a folded scalar (>).
The second item uses a block scalar (|).

Combining Sequences and Mappings¶

You can combine sequences and mappings to create complex structures.

yml
complex_structure:
  - name: "Item 1" 📦
    attributes:
      - attribute1: value1
      - attribute2: value2
  - name: "Item 2" 📦
    attributes:
      - attribute1: value3
      - attribute2: value4

Each item in complex_structure is a dictionary with a nested list of dictionaries (attributes).