main repo

node_modules/recharts/lib/util/getEveryNthWithCondition.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.getEveryNthWithCondition = getEveryNthWithCondition;
+/**
+ * Given an array and a number N, return a new array which contains every nTh
+ * element of the input array. For n below 1, an empty array is returned.
+ * If isValid is provided, all candidates must suffice the condition, else undefined is returned.
+ * @param {T[]} array An input array.
+ * @param {integer} n A number
+ * @param {Function} isValid A function to evaluate a candidate form the array
+ * @returns {T[]} The result array of the same type as the input array.
+ */
+function getEveryNthWithCondition(array, n, isValid) {
+  if (n < 1) {
+    return [];
+  }
+  if (n === 1 && isValid === undefined) {
+    return array;
+  }
+  var result = [];
+  for (var i = 0; i < array.length; i += n) {
+    if (isValid === undefined || isValid(array[i]) === true) {
+      result.push(array[i]);
+    } else {
+      return undefined;
+    }
+  }
+  return result;
+}