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/*
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* ====================================================
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* package :
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* author : Created by nansi.
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* time : 2019/6/20 10:11 AM
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* remark :
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* ====================================================
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*/
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import 'package:encrypt/encrypt.dart';
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mixin TestMixin on BaseClass {
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void init() {
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print('TestMixin init start');
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super.init();
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print('TestMixin init end');
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}
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}
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mixin TestMixin2 on BaseClass {
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void init() {
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print('TestMixin2 init start');
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super.init();
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print('TestMixin2 init end');
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}
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}
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class BaseClass {
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void init() {
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print('Base init');
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}
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BaseClass() {
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init();
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}
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}
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class TestClass extends BaseClass with TestMixin, TestMixin2 {
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@override
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void init() {
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print('TestClass init start');
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print('TestClass init end');
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}
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}
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final parser = RSAKeyParser();
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void main() async {
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// List<int> ints = [1,2,3,4,5,6];
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// for(int value in ints) {
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// if (value == 3) {
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// continue;
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// }
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// print("----- $value");
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// }
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// for (int i = 1; i <= 9; ++i) {
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// StringBuffer stringBuffer = StringBuffer();
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// for (int j = 1; j <= i; ++j) {
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// stringBuffer.write("$j * $i = ${i*j} ");
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// }
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// print("$stringBuffer \n");
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// }
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//
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// var arr = [1, 2, 3,4];
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//// 临时变量，用于输出
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//
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// print(DateTime.now());
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// for (int m = 0; m < 100; m++) {
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// n(arr);
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// }
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// print(result);
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// print(DateTime.now());
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// TestClass();
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/// TestClass init start
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/// TestMixin2 init start
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/// TestMixin init start
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/// Base init
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/// TestMixin init end
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/// TestMixin2 init end
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/// TestClass init end
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}
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var result = [];
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var temp = [];
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n(List arr) {
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for (var i = 0; i < arr.length; i++) {
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// 插入第i个值
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temp.add(arr[i]);
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// 复制数组
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var copy = [];
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copy.addAll(arr);
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// 删除复制数组中的第i个值，用于递归
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copy.removeAt(i);
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if (copy.length == 0) {
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// 如果复制数组长度为0了，则打印变量
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temp.sort();
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if (!result.contains(temp.join("-"))) {
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result.add(temp.join("-"));
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}
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} else {
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// 否则进行递归
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n(copy);
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}
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// 递归完了之后删除最后一个元素，保证下一次插入的时候没有上一次的元素
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temp.clear();
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}
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}
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