(use_fast_arrays:true,array(bil,3),0);
0$
bil[1];
false;
bil[1]:3;
3;
bil[1];
3;
listarray(bil);
[false, 3, false,false];
arrayinfo(bil);
[declared, 1, [3]];
ha[1]:2;
2;
ha[3];
false;
arrayinfo(ha);
[hash_table, 1, 1];
use_fast_arrays:false;
false;
array(bil1,3);
bil1;
bil1[2];
bil1[2];
bil1[2]:3;
3;
bil1[2];
3;
listarray(bil1);
[''?munbound,''?munbound,3,''?munbound];
arrayinfo(bil1);
[declared, 1, [3]];
oldha[1]:8;
8;
oldha[2];
oldha[2];
arrayinfo(oldha);
[hashed, 1, [1]];
use_fast_arrays:true;
true;
bilx[n]:=n*bilx[n-1];
bilx[n]:=n*bilx[n-1];
bilx[0]:1;
1;
bilx[3];
6;

use_fast_arrays: false;
false;

block ([use_fast_arrays : true], kill (foo), foo [2] : 'x, foo [3] : 'y, foo [5] : 'z, foo [7] : 'a, sort (listarray (foo)));
[a, x, y, z];

