Has Value
What It Does
The Has Value node checks if a value is defined and outputs a boolean result. It evaluates whether the input is null or undefined, returning true if the value is missing and false if it exists.
Inputs
| Name | Description | Type | Required |
|---|---|---|---|
| Value | The value to check for existence | Any | Yes |
Outputs
| Name | Description | Type |
|---|---|---|
| Result | True if the value is undefined or null, false otherwise | Boolean |
How to Use It
- Drag the Has Value node into your graph.
- Connect any value to the "Value" input.
- The node outputs true if the value is null or undefined.
- Use the boolean output to control conditional logic in your graph.
Tips
- This node is useful for handling optional inputs gracefully.
- Combine with the If node to create fallback logic when values are missing.
See Also
- Assert defined: For throwing an error when a value is undefined.
- If: For creating conditional branches based on the result.
- Parse Number: For checking if a value can be parsed as a number.
Use Cases
- Default Value Selection: Check if a value exists before deciding to use a fallback.
- Optional Parameter Handling: Gracefully work with inputs that might not be provided.
- Data Validation: Verify the presence of data before processing it.