if n < 0 {
		panic("cannot be negative")
	}
	if n -= cap(s) - len(s); n > 0 {
		s = append(s[:cap(s)], make([]E, n)...)[:len(s)]
	}
	return s
}

// Clip removes unused capacity from the slice, returning s[:len(s):len(s)].
func Clip[S ~[]E, E any](s S) S {
	return s[:len(s):len(s)]
}

// TODO: There are other rotate algorithms.

	clip(dst, &r, src, &sp, nil, nil)
	if r.Empty() {
		return
	}
	drawPaletted(dst, r, src, sp, true)
}

// clip clips r against each image's bounds (after translating into the
// destination image's coordinate space) and shifts the points sp and mp by
// the same amount as the change in r.Min.

		t.Errorf("len(%v) = %d, want 3", s1, len(s1))
	}
	if cap(s1) < 6 {
		t.Errorf("cap(%v[:3]) = %d, want >= 6", orig, cap(s1))
	}
	s2 := Clip(s1)
	if !Equal(s1, s2) {
		t.Errorf("Clip(%v) = %v, want %v", s1, s2, s1)
	}
	if cap(s2) != 3 {
		t.Errorf("cap(Clip(%v)) = %d, want 3", orig, cap(s2))
	}
}

func TestReverse(t *testing.T) {
	even := []int{3, 1, 4, 1, 5, 9} // len = 6
	Reverse(even)

    # is unusually small.
    if abs(zero_point) > 9e9:
      zero_point = 9e9
    if abs(scale) < 1e-9:
      scale = 1e-9

    zero_point = round(zero_point)
    quantized_hist_mids = np.clip(
        np.round(self._hist_mids / scale) + zero_point, minbound, maxbound
    )
    dequantized_hist_mids = scale * (quantized_hist_mids - zero_point)
    return dequantized_hist_mids

			telemetry.Inc("go/subcommand:" + strings.ReplaceAll(cfg.CmdName, " ", "-") + "-" + strings.Join(args[used:], "-"))
			help.Help(os.Stdout, append(slices.Clip(args[:used]), args[used+1:]...))
			base.Exit()
		}
		helpArg := ""
		if used > 0 {
			helpArg += " " + strings.Join(args[:used], " ")
		}
		cmdName := cfg.CmdName
		if cmdName == "" {

              </svg>
              {% endfor %}
              {% for n in range(5 - review.rating.stars) %}

		ptest.EmbedFiles = str.StringList(p.EmbedFiles, p.TestEmbedFiles)
		ptest.Internal.OrigImportPath = p.Internal.OrigImportPath
		ptest.Internal.PGOProfile = p.Internal.PGOProfile
		ptest.Internal.Build.Directives = append(slices.Clip(p.Internal.Build.Directives), p.Internal.Build.TestDirectives...)
	} else {
		ptest = p
	}

	// External test package.
	if len(p.XTestGoFiles) > 0 {
		pxtest = &Package{
			PackagePublic: PackagePublic{

	if len(words) == 1 {
		g.errorf("no command specified for -command")
	}
	command := words[1]
	if g.commands[command] != nil {
		g.errorf("command %q multiply defined", command)
	}
	g.commands[command] = slices.Clip(words[2:])
}

// exec runs the command specified by the argument. The first word is
// the command name itself.
func (g *Generator) exec(words []string) {
	path := words[0]

}

// run runs the command and requires that it succeeds.
func (r runner) run(t *testing.T, args ...string) {
	t.Helper()
	cmd := testenv.Command(t, args[0], args[1:]...)
	cmd.Dir = r.Dir
	cmd.Env = slices.Clip(r.Env)
	if r.Dir != "" {
		cmd.Env = append(cmd.Env, "PWD="+r.Dir)
	}
	out, err := cmd.CombinedOutput()
	if err != nil {
		t.Logf("> %s\n", strings.Join(args, " "))
		t.Fatalf("command failed: %s\n%s", err, out)

		case 3:
			dst, stride = d.blackPix[8*(by*d.blackStride+bx):], d.blackStride
		default:
			return UnsupportedError("too many components")
		}
	}
	// Level shift by +128, clip to [0, 255], and write to dst.
	for y := 0; y < 8; y++ {
		y8 := y * 8
		yStride := y * stride
		for x := 0; x < 8; x++ {
			c := b[y8+x]
			if c < -128 {
				c = 0
			} else if c > 127 {
				c = 255