@visactor/vgrammar-core/cjs/transforms/data/bin.js

VGrammar is a visual grammar library

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: !0
}), exports.transform = void 0;

const vutils_1 = require("@visactor/vutils"), defaultBins = 10, transform = (options, upstreamData) => {
    if (!upstreamData || 0 === upstreamData.length) return upstreamData;
    const {extent: extent, step: step} = options, bins = (0, vutils_1.isValid)(options.bins) ? Math.max(options.bins, 1) : 10, range = extent[1] - extent[0], binStep = (0, 
    vutils_1.isValid)(step) ? step : range / bins;
    return upstreamData.map((upstreamDatum => {
        var _a, _b, _c, _d;
        const datum = Object.assign({}, upstreamDatum), value = upstreamDatum[options.field], binIndex = Math.floor((value - extent[0]) / binStep), binStart = extent[0] + binIndex * binStep, binEnd = Math.min(extent[1], extent[0] + (binIndex + 1) * binStep);
        return datum[null !== (_b = null === (_a = options.as) || void 0 === _a ? void 0 : _a[0]) && void 0 !== _b ? _b : "binStart"] = binStart, 
        datum[null !== (_d = null === (_c = options.as) || void 0 === _c ? void 0 : _c[1]) && void 0 !== _d ? _d : "binEnd"] = binEnd, 
        datum;
    }));
};

exports.transform = transform;
//# sourceMappingURL=bin.js.map