array_apply.json

{
    "id": "array_apply",
    "summary": "Applies a unary process to each array element",
    "description": "Applies a **unary** process which takes a single value such as `abs` or `sqrt` to each value in the array. This is basically what other languages call either a `for each` loop or a `map` function.",
    "categories": [
        "arrays"
    ],
    "parameters": [
        {
            "name": "data",
            "description": "An array.",
            "schema": {
                "type": "array",
                "items": {
                    "description": "Any data type is allowed."
                }
            }
        },
        {
            "name": "process",
            "description": "A process to be applied on each value, may consist of multiple sub-processes. The specified process must be unary meaning that it must work on a single value.",
            "schema": {
                "type": "object",
                "subtype": "process-graph",
                "parameters": [
                    {
                        "name": "x",
                        "description": "The value of the current element being processed.",
                        "schema": {
                            "description": "Any data type."
                        }
                    },
                    {
                        "name": "index",
                        "description": "The zero-based index of the current element being processed.",
                        "schema": {
                            "type": "integer"
                        }
                    },
                    {
                        "name": "label",
                        "description": "The label of the current element being processed. Only populated for labeled arrays.",
                        "schema": [
                            {
                                "type": "number"
                            },
                            {
                                "type": "string"
                            },
                            {
                                "type": "null"
                            }
                        ],
                        "default": null,
                        "optional": true
                    },
                    {
                        "name": "context",
                        "description": "Additional data passed by the user.",
                        "schema": {
                            "description": "Any data type."
                        },
                        "optional": true,
                        "default": null
                    }
                ]
            }
        },
        {
            "name": "context",
            "description": "Additional data to be passed to the process.",
            "schema": {
                "description": "Any data type."
            },
            "optional": true,
            "default": null
        }
    ],
    "returns": {
        "description": "An array with the newly computed values. The number of elements are the same as for the original array.",
        "schema": {
            "type": "array",
            "items": {
                "description": "Any data type is allowed."
            }
        }
    },
    "links": [
        {
            "rel": "example",
            "type": "application/json",
            "href": "https://processes.openeo.org/draft/examples/array_find_nodata.json",
            "title": "Find no-data values in arrays"
        },
        {
            "rel": "example",
            "type": "application/json",
            "href": "https://processes.openeo.org/draft/examples/array_contains_nodata.json",
            "title": "Check for no-data values in arrays"
        }
    ]
}