rb_hash_delete_if  681 ext/dbm/dbm.c      return rb_hash_delete_if(fdbm_to_hash(obj));
rb_hash_delete_if 1170 ext/gdbm/gdbm.c     return rb_hash_delete_if(fgdbm_to_hash(obj));
rb_hash_delete_if  660 ext/sdbm/init.c     return rb_hash_delete_if(fsdbm_to_hash(obj));
rb_hash_delete_if  868 hash.c             rb_hash_delete_if(hash);
rb_hash_delete_if  886 hash.c             return rb_hash_delete_if(rb_obj_dup(hash));
rb_hash_delete_if 2484 hash.c             return rb_hash_delete_if(env_to_hash());
rb_hash_delete_if 2631 hash.c             rb_define_method(rb_cHash,"delete_if", rb_hash_delete_if, 0);
rb_hash_delete_if  383 include/ruby/intern.h VALUE rb_hash_delete_if(VALUE);