@react-financial-charts/indicators/lib/utils/zipper.js

Indicators for react-financial-charts

/* an extension to d3.zip so we call a function instead of an array */
import { min } from "d3-array";
import { identity } from "./identity";
export default function zipper() {
    let combine = identity;
    function zip() {
        var _a;
        const n = arguments.length;
        if (n === 0) {
            return [];
        }
        const m = (_a = min(arguments, d3_zipLength)) !== null && _a !== void 0 ? _a : 0;
        const zips = new Array(m);
        for (let i = -1; ++i < m;) {
            // tslint:disable-next-line: no-shadowed-variable
            for (let j = -1, zip = (zips[i] = new Array(n)); ++j < n;) {
                zip[j] = arguments[j][i];
            }
            // @ts-ignore
            zips[i] = combine.apply(this, zips[i]);
        }
        return zips;
    }
    function d3_zipLength(d) {
        return d.length;
    }
    zip.combine = function (x) {
        if (!arguments.length) {
            return combine;
        }
        combine = x;
        return zip;
    };
    return zip;
}
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