slice

import mir.ndslice.slice: Slice;
auto tensor = slice!int(5, 6, 7);
assert(tensor.length == 5);
assert(tensor.length!1 == 6);
assert(tensor.elementCount == 5 * 6 * 7);
static assert(is(typeof(tensor) == Slice!(int*, 3)));

import mir.ndslice.slice;
import mir.ndslice.allocation: slice;
import mir.date: Date;

auto dataframe = slice!(double, Date, string)(4, 3);
assert(dataframe.length == 4);
assert(dataframe.length!1 == 3);
assert(dataframe.elementCount == 4 * 3);

static assert(is(typeof(dataframe) ==
    Slice!(double*, 2, Contiguous, Date*, string*)));

// Dataframe labels are contiguous 1-dimensional slices.

// Fill row labels
dataframe.label[] = [
    Date(2019, 1, 24),
    Date(2019, 2, 2),
    Date(2019, 2, 4),
    Date(2019, 2, 5),
];

assert(dataframe.label!0[2] == Date(2019, 2, 4));

// Fill column labels
dataframe.label!1[] = ["income", "outcome", "balance"];

assert(dataframe.label!1[2] == "balance");

// Change label element
dataframe.label!1[2] = "total";
assert(dataframe.label!1[2] == "total");

// Attach a newly allocated label
dataframe.label!1 = ["Income", "Outcome", "Balance"].sliced;

assert(dataframe.label!1[2] == "Balance");