del_hash         3684 ext/date/date_core.c #define del_hash(k) rb_hash_delete(hash, ID2SYM(rb_intern(k)))
del_hash           42 ext/date/date_parse.c #define del_hash(k) rb_hash_delete(hash, ID2SYM(rb_intern(k)))
del_hash          118 ext/date/date_strptime.c #define del_hash(k) rb_hash_delete(hash, ID2SYM(rb_intern(k)))