@antv/t8/lib/charts/utils/data.js

T8 is a text visualization solution for unstructured data within the AntV technology stack, and it is a declarative T8 markdown syntax that can be used to describe the content of data interpretation reports.

'use strict';

function max(array, accessor) {
    if (!array || array.length === 0) {
        return undefined;
    }
    // Use the accessor if provided, otherwise assume the array already contains numbers.
    var values = accessor ? array.map(accessor) : array;
    return Math.max.apply(Math, values);
}
function extent(array, accessor) {
    if (!array || array.length === 0) {
        return [undefined, undefined];
    }
    var values = array;
    var minVal = Math.min.apply(Math, values);
    var maxVal = Math.max.apply(Math, values);
    return [minVal, maxVal];
}
function mean(array, accessor) {
    if (!array || array.length === 0) {
        return undefined;
    }
    var values = accessor ? array.map(accessor) : array;
    var sum = values.reduce(function (a, b) { return a + b; }, 0);
    return sum / values.length;
}

exports.extent = extent;
exports.max = max;
exports.mean = mean;
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