is_valid.json

{
    "id": "is_valid",
    "summary": "Value is valid data",
    "description": "Checks whether the specified value `x` is valid. The following values are considered valid:\n\n* Any finite numerical value (integers and floating-point numbers). The definition of finite numbers follows the [IEEE Standard 754](https://ieeexplore.ieee.org/document/4610935) and excludes the special value `NaN` (not a number).\n* Any other value that is not a no-data value according to ``is_nodata()``. Thus all arrays, objects and strings are valid, regardless of their content.",
    "categories": [
        "comparison"
    ],
    "parameters": [
        {
            "name": "x",
            "description": "The data to check.",
            "schema": {
                "description": "Any data type is allowed."
            }
        }
    ],
    "returns": {
        "description": "`true` if the data is valid, otherwise `false`.",
        "schema": {
            "type": "boolean"
        }
    },
    "examples": [
        {
            "arguments": {
                "x": 1
            },
            "returns": true
        },
        {
            "arguments": {
                "x": "Test"
            },
            "returns": true
        },
        {
            "arguments": {
                "x": null
            },
            "returns": false
        },
        {
            "arguments": {
                "x": [
                    null,
                    null
                ]
            },
            "returns": true
        }
    ],
    "links": [
        {
            "rel": "about",
            "href": "https://ieeexplore.ieee.org/document/4610935",
            "title": "IEEE Standard 754-2008 for Floating-Point Arithmetic"
        }
    ]
}