js中一个二维数组怎么判断某一固定列中是否存在某值,要最优算法?_百度...答:var array = [["122928002", "201048003,50025899"], ["122928002", ",50023172"], ["122928004", ",50023172"]];var newarray = array.filter((e,i,a)=>{ var i1=a.findIndex(e1=>e1[0]==e[0]);if(i1
JS中二维数组的怎么每个拿出一项来呢?答:按照你的要求编写的程序如下 let list = [["预付款项", "支付现金", "长期借款"],[755340403, 17085162670, 3536364338],[1204418576, 8658473101, 3444301912],]let header = ['公司', '2020-12-31', '2021-06-30']let TableData =[]for(let i=0;i<list.length;i++){ let temp={}...
JS中,怎样用for..in来输出二维数组?答:var week=[["周一","周二","周三","周四","周五","周六","周日"],["吃饭","睡觉","学习"]]for (var i = 0; i < week.length; i++) { for (var j = 0; j < week[i].length; j++) { document.write(week[i][j]+"")} } ...