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用for对数组的操作,大神进答:var data = [{"xvalue":"美国","yvalue":"方法","value":"42"},{"xvalue":"美国","yvalue":"计算机","value":"92"},{"xvalue":"山东","yvalue":"一种","value":"100"},{"xvalue":"山东","yvalue"