一道考察数组知识的编程题

 1 let arr = [‘foo‘, ‘bar‘, ‘hello‘, ‘world‘],
 2     str = ‘‘,
 3     newArr = [],
 4     results = [];
 5 
 6     for (let i = 0; i < 99; i++) {
 7         newArr.push(arr.sort(() => {
 8             return Math.random() > 0.5 ? 1 : -1;
 9         }).join(‘‘));
10 
11     }
12 
13     unique = args => {
14         for (let i = 0; i < args.length; i++) {
15             if (results.indexOf(args[i]) < 0) {
16                 results.push(args[i]);
17             }
18         }
19         return results;
20     }
21 
22     // 数组去重
23     // newArr.unique();
24     unique(newArr);
25 
26     console.log(‘the results is:\n‘);
27 
28     results.map(item => {
29         console.log(item);
30     });