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Polish the chapter of array and linkedlist
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@@ -6,7 +6,7 @@
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import 'dart:math';
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/* 随机返回一个数组元素 */
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/* 随机访问元素 */
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int randomAccess(List nums) {
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// 在区间 [0, nums.length) 中随机抽取一个数字
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int randomIndex = Random().nextInt(nums.length);
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