Function stripNulls

typescript/src/typechat.ts:170–193

* Recursively delete properties with null values from the given object. This function assumes there are no * circular references in the object. * @param obj The object in which to strip null valued properties.

(obj: any)

 * @param obj The object in which to strip null valued properties.
 */
function stripNulls(obj: any) {
    let keysToDelete: string[] | undefined;
    for (const k in obj) {
        const value = obj[k];
        if (value === null) {
            (keysToDelete ??= []).push(k);
        }
        else {
            if (Array.isArray(value)) {
                if (value.some(x => x === null)) {
                    obj[k] = value.filter(x => x !== null);
                }
            }
            if (typeof value === "object") {
                stripNulls(value);
            }
        }
    }
    if (keysToDelete) {
        for (const k of keysToDelete) {
            delete obj[k];
        }
    }
}