/**
* Recursively removes properties with null or undefined values from an object or array.
* @param obj The input object or array.
* @returns A new object or array with null/undefined properties/elements removed, or the original value if not an object/array.
*/
export function stripNullUndefined<T>(obj: T): T | undefined {
if (obj === null || obj === undefined) {
return undefined;
}
// Handle arrays
if (Array.isArray(obj)) {
const newArr = obj.reduce<any[]>((acc, item) => {
const processed = stripNullUndefined(item);
if (processed !== undefined) {
acc.push(processed);
}
return acc;
}, []);
return newArr.length > 0 ? newArr as T : undefined;
}
// Handle objects (excluding Date and other special objects)
if (typeof obj === 'object' && !(obj instanceof Date)
&& !(obj instanceof RegExp) && !(obj instanceof Map)
&& !(obj instanceof Set) && !(obj instanceof Error)) {
const newObj: Record<string, any> = {};
let hasKeys = false;
for (const key of Object.keys(obj)) {
const value = stripNullUndefined(obj[key as keyof T]);
if (value !== undefined) {
newObj[key] = value;
hasKeys = true;
}
}
return hasKeys ? newObj as T : undefined;
}
return obj;
}
