添加项目文件。

Epost.TestToolsWeb/Content/code/es-modules/mixins/reduce-array.js

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+/**
+ * (c) 2010-2018 Pawel Fus & Daniel Studencki
+ *
+ * License: www.highcharts.com/license
+ */
+
+'use strict';
+import H from '../parts/Globals.js';
+import '../parts/Utilities.js';
+
+var reduce = H.reduce;
+
+var reduceArrayMixin = {
+    /**
+     * Get min value of array filled by OHLC data.
+     * @param {array} arr Array of OHLC points (arrays).
+     * @param {string} index Index of "low" value in point array.
+     * @returns {number} Returns min value.
+     */
+    minInArray: function (arr, index) {
+        return reduce(arr, function (min, target) {
+            return Math.min(min, target[index]);
+        }, Number.MAX_VALUE);
+    },
+    /**
+     * Get max value of array filled by OHLC data.
+     * @param {array} arr Array of OHLC points (arrays).
+     * @param {string} index Index of "high" value in point array.
+     * @returns {number} Returns max value.
+     */
+    maxInArray: function (arr, index) {
+        return reduce(arr, function (min, target) {
+            return Math.max(min, target[index]);
+        }, -Number.MAX_VALUE);
+    },
+    /**
+     * Get extremes of array filled by OHLC data.
+     * @param {array} arr Array of OHLC points (arrays).
+     * @param {string} minIndex Index of "low" value in point array.
+     * @param {string} maxIndex Index of "high" value in point array.
+     * @returns {array} Returns array with min and max value.
+     */
+    getArrayExtremes: function (arr, minIndex, maxIndex) {
+        return reduce(arr, function (prev, target) {
+            return [
+                Math.min(prev[0], target[minIndex]),
+                Math.max(prev[1], target[maxIndex])
+            ];
+        }, [Number.MAX_VALUE, -Number.MAX_VALUE]);
+    }
+};
+export default reduceArrayMixin;