Handling Null or Invalid field Values using a function

The setValueForNull function is used to ensure that a parameter has a valid value before performing any operations. It checks if the parameter is not empty, null, undefined, or other invalid string values, and processes it accordingly.

Purpose: This function handles input validation by ensuring that the provided parameter is valid (not null, undefined, or empty). It also processes the parameter by converting a comma-separated string of numbers into an array of numbers.

Key Variables:

• parameter: The input parameter that is validated and processed.
• updatedParameterValue: An array of numbers created by splitting the input string by commas and converting each part to a number.

Functionality:

• It first checks if the parameter is not empty, null, undefined, or other invalid values (e.g., “null”, “undefined”, ” “).
• If the parameter is valid, it splits the string by commas and converts each element to a number.
• If the parameter is invalid, it returns an empty array ([]).
• In case of an error, it logs the error message for debugging.

Use Case:

This function ensures that invalid inputs are handled gracefully and that any valid parameter is properly formatted into an array of numbers. It is useful in cases where parameters might be dynamic and need to be validated before processing.

The function is:

 function setValueForNull(parameter) {
            try {
                if (parameter !== "" && parameter !== null && parameter !== undefined /* && parameter !== false */ && parameter !== "null" && parameter !== "undefined" && parameter !== " " /* && parameter !== 'false'*/) {
                    let updatedParameterValue = (parameter.split(',')).map(Number)
                    log.debug('updatedParameterValue', updatedParameterValue);
                    return updatedParameterValue;
                } else {
                    log.debug("Empty value found in DIAB configuration record. This might cause error in diab screens");
                    return [];
                }
            } catch (e) {
                log.debug('error@setValueForNull', e)
            }
        }