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怎么查询删除二维数组里的一维数组[{1,2},{3,4},{5,6},{7,8},{9...答:var arr2=[2,8];var str1=JSON.stringify(arr1);for(var i=0;i<arr2.length;i++){ str1=str1.replace(new RegExp(",?" + arr2[i],"g"),"");} arr1=eval("("+str1+")");console.log(arr1);
js如何定义二维数组,一维的key为动态值。就是要处理二级菜单显示。_百 ...答:懂字典或map的概念吗:你需要的应该 是这样的数据结构:var menu = { "submenu1":[ {"name":"item1","id":"1","link":"}, {"name":"item2","id":"2","link":"} ], "submenu2":[ {"name":"item1","id":"1","link":"}, {"name":...