End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
GDBM#invert
gdbm.invert → hash
ext/gdbm/gdbm.c
View on GitHub ↗
static VALUE
fgdbm_invert(VALUE obj)
{
struct dbmdata *dbmp;
GDBM_FILE dbm;
VALUE keystr, valstr;
VALUE hash = rb_hash_new();
GetDBM2(obj, dbmp, dbm);
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
keystr = rb_gdbm_nextkey(dbm, keystr)) {
valstr = rb_gdbm_fetch2(dbm, keystr);
rb_hash_aset(hash, valstr, keystr);
}
return hash;
}
Returns a hash created by using gdbm’s values as keys, and the keys as values.