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isNaN (float)

The isNaN node checks if the input value is not a number (NaN). It returns true if the input is NaN, and false otherwise.

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Inputs

  1. a (float, default: 0): The value to check for NaN.

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Outputs

  1. result (boolean): true if the input is NaN, false otherwise.

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Configuration

This node has no configuration options.

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Usage

The isNaN node is useful when you need to determine if a value is not a valid number. This can be helpful in data validation, error handling, or conditional logic based on the presence of NaN values. To use the isNaN node:
  1. Connect the value you want to check for NaN to the a input port.
  2. The result output port will emit true if the input is NaN, and false otherwise.
  3. Use the result output in your spell logic as needed, such as in a branch node or as a condition for further processing.

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Example

Here’s an example of how to use the isNaN node in a spell: 
{
  "nodes": [
    {
      "type": "input/number",
      "id": "1",
      "data": {
        "name": "input",
        "label": "Input Number"
      },
      "outputs": {
        "output": { "connections": [{ "node": "2", "input": "a" }] }
      }
    },
    {
      "type": "math/isNaN/float",
      "id": "2",
      "outputs": {
        "result": { "connections": [{ "node": "3", "input": "condition" }] }
      }
    },
    {
      "type": "logic/branch",
      "id": "3",
      "inputs": {
        "true": { "connections": [{ "node": "4", "input": "message" }] },
        "false": { "connections": [{ "node": "5", "input": "message" }] }
      }
    },
    {
      "type": "output/text",
      "id": "4",
      "data": { "text": "The input is NaN" }
    },
    {
      "type": "output/text", 
      "id": "5",
      "data": { "text": "The input is a valid number" }
    }
  ]
}
In this example:
  1. The input/number node allows the user to enter a number.
  2. The isNaN node checks if the input number is NaN.
  3. The logic/branch node uses the result from isNaN to conditionally route the flow.
  4. If the input is NaN, the “The input is NaN” message is displayed.
  5. If the input is a valid number, the “The input is a valid number” message is displayed.

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Best Practices

  • Use the isNaN node when you need to explicitly check for NaN values, such as in data validation or error handling scenarios.
  • Remember that isNaN only checks for NaN values, not other types of invalid numbers like infinity or undefined.

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Common Issues

  • Ensure that the input to the isNaN node is of type float. Connecting a non-float value may lead to unexpected behavior.
  • Keep in mind that isNaN will return false for non-numeric values like strings or booleans. If you need to check for these cases, consider using additional type-checking nodes.