var arr=[1,2,3,5,10,4,2,19,2,0]; alert(arr);//[1,2,3,5,10,4,2,19,2,0] arr.sort(function (a, b) {//升序 return a-b; }); alert(arr);//[0,1,2,2,3,4,5,10,19] var arr2=[{a:1},{a:4},{a:0}]; alert(arr2.map(function (value, index, array) {//[1,4,0] return valu…