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58 lines
1.4 KiB
58 lines
1.4 KiB
import {slice} from "./array";
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import constant from "./constant";
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import offsetNone from "./offset/none";
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import orderNone from "./order/none";
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function stackValue(d, key) {
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return d[key];
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}
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export default function() {
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var keys = constant([]),
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order = orderNone,
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offset = offsetNone,
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value = stackValue;
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function stack(data) {
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var kz = keys.apply(this, arguments),
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i,
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m = data.length,
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n = kz.length,
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sz = new Array(n),
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oz;
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for (i = 0; i < n; ++i) {
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for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
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si[j] = sij = [0, +value(data[j], ki, j, data)];
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sij.data = data[j];
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}
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si.key = ki;
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}
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for (i = 0, oz = order(sz); i < n; ++i) {
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sz[oz[i]].index = i;
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}
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offset(sz, oz);
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return sz;
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}
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stack.keys = function(_) {
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return arguments.length ? (keys = typeof _ === "function" ? _ : constant(slice.call(_)), stack) : keys;
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};
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stack.value = function(_) {
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return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), stack) : value;
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};
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stack.order = function(_) {
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return arguments.length ? (order = _ == null ? orderNone : typeof _ === "function" ? _ : constant(slice.call(_)), stack) : order;
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};
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stack.offset = function(_) {
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return arguments.length ? (offset = _ == null ? offsetNone : _, stack) : offset;
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};
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return stack;
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}
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