Function zsetDel

src/t_zset.cpp:1488–1506

Delete the element 'ele' from the sorted set, returning 1 if the element * existed and was deleted, 0 otherwise (the element was not there). */

/* Delete the element 'ele' from the sorted set, returning 1 if the element
 * existed and was deleted, 0 otherwise (the element was not there). */
int zsetDel(robj *zobj, sds ele) {
    if (zobj->encoding == OBJ_ENCODING_ZIPLIST) {
        unsigned char *eptr;

        if ((eptr = zzlFind((unsigned char*)zobj->m_ptr,ele,NULL)) != NULL) {
            zobj->m_ptr = zzlDelete((unsigned char*)zobj->m_ptr,eptr);
            return 1;
        }
    } else if (zobj->encoding == OBJ_ENCODING_SKIPLIST) {
        zset *zs = (zset*)ptrFromObj(zobj);
        if (zsetRemoveFromSkiplist(zs, ele)) {
            if (htNeedsResize(zs->dict)) dictResize(zs->dict);
            return 1;
        }
    } else {
        serverPanic("Unknown sorted set encoding");
    }
    return 0; /* No such element found. */
}

/* Given a sorted set object returns the 0-based rank of the object or
 * -1 if the object does not exist.