| # indexing |
| assert_eq("somestring"[0], "s") |
| assert_eq("somestring"[1], "o") |
| assert_eq("somestring"[4], "s") |
| assert_eq("somestring"[9], "g") |
| assert_eq("somestring"[-1], "g") |
| assert_eq("somestring"[-2], "n") |
| assert_eq("somestring"[-10], "s") |
| assert_fails(lambda: "abcdef"[10], "index out of range") |
| assert_fails(lambda: "abcdef"[-11], "index out of range") |
| |
| # slicing |
| assert_eq("0123"[0:-1], "012") |
| assert_eq("012345"[2:4], "23") |
| assert_eq("012345"[-2:-1], "4") |
| assert_eq(""[1:2], "") |
| assert_eq("012"[1:0], "") |
| assert_eq("0123"[-10:10], "0123") |
| |
| assert_eq("01234"[::1], "01234") |
| assert_eq("01234"[1::1], "1234") |
| assert_eq("01234"[:2:1], "01") |
| assert_eq("01234"[1:3:1], "12") |
| assert_eq("01234"[-4:-2:1], "12") |
| assert_eq("01234"[-10:10:1], "01234") |
| assert_eq("01234"[::42], "0") |
| |
| assert_eq(""[::1], "") |
| assert_eq(""[::-1], "") |
| |
| assert_eq("0123456"[::3], "036") |
| assert_eq("01234567"[1:7:3], "14") |
| |
| assert_eq("01234"[::-1], "43210") |
| assert_eq("01234"[4::-1], "43210") |
| assert_eq("01234"[:0:-1], "4321") |
| assert_eq("01234"[3:1:-1], "32") |
| assert_eq("01234"[::-2], "420") |
| assert_eq("01234"[::-10], "4") |
| |
| assert_eq("123"[3:1:1], "") |
| assert_eq("123"[1:3:-1], "") |
| |
| assert_fails(lambda: "123"[::0], "slice step cannot be zero") |
| assert_fails(lambda: "123"[1::0], "slice step cannot be zero") |
| assert_fails(lambda: "123"[:3:0], "slice step cannot be zero") |
| assert_fails(lambda: "123"[1:3:0], "slice step cannot be zero") |
| assert_fails(lambda: "123"["a"::], "got string for start index, want int") |
| assert_fails(lambda: "123"[:"b":], "got string for stop index, want int") |
