vrl 0.32.0

Vector Remap Language
Documentation 
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{
  "anchor": "is_empty",
  "name": "is_empty",
  "category": "Type",
  "description": "Check if the object, array, or string has a length of `0`.",
  "arguments": [
    {
      "name": "value",
      "description": "The value to check.",
      "required": true,
      "type": [
        "string",
        "object",
        "array"
      ]
    }
  ],
  "return": {
    "types": [
      "boolean"
    ],
    "rules": [
      "Returns `true` if `value` is empty.",
      "Returns `false` if `value` is non-empty."
    ]
  },
  "examples": [
    {
      "title": "Empty array",
      "source": "is_empty([])",
      "return": true
    },
    {
      "title": "Non-empty string",
      "source": "is_empty(\"a string\")",
      "return": false
    },
    {
      "title": "Non-empty object",
      "source": "is_empty({\"foo\": \"bar\"})",
      "return": false
    },
    {
      "title": "Empty string",
      "source": "is_empty(\"\")",
      "return": true
    },
    {
      "title": "Empty object",
      "source": "is_empty({})",
      "return": true
    },
    {
      "title": "Non-empty array",
      "source": "is_empty([1,2,3])",
      "return": false
    }
  ],
  "pure": true
}