first フィルター（配列の最初の要素を取得）

{
  "category": "array",
  "deprecated": false,
  "deprecation_reason": "",
  "description": "",
  "parameters": [],
  "return_type": [
    {
      "type": "untyped",
      "name": "",
      "description": "",
      "array_value": ""
    }
  ],
  "examples": [
    {
      "name": "",
      "description": "",
      "syntax": "",
      "path": "/collections/all",
      "raw_liquid": "{%- assign first_product = collection.products | first -%}\n\n{{ first_product.title }}",
      "parameter": false,
      "display_type": "text",
      "show_data_tab": true
    },
    {
      "name": "Dot notation",
      "description": "You can use the `first` filter with dot notation when you need to use it inside a tag or object output.\n",
      "syntax": "",
      "path": "/collections/all",
      "raw_liquid": "{{ collection.products.first.title }}",
      "parameter": false,
      "display_type": "text",
      "show_data_tab": true
    }
  ],
  "summary": "Returns the first item in an array.",
  "syntax": "array | first",
  "name": "first"
}