摘要: ###第一种方法 let a = [1,2,1,'a','b','2'] let newArr = [] let i,len = a.length for(i = 0; i < len; i++) { if(newArr.indexOf(a[i]) == -1) { newArr.push(a[i] 阅读全文
posted @ 2021-07-19 19:16 苟安 阅读(51) 评论(0) 推荐(0)
摘要: 控制台输出重复元素的个数 let arr = ['a', 'b', '2', 'w', 'a', 'a', 'b'] let b = [...new Set(arr)] let len = b.length,i for(i=0;i<len;i++) { let num = arr.filter(it 阅读全文
posted @ 2021-07-16 18:15 苟安 阅读(351) 评论(0) 推荐(0)