let arrayMerge = (...arrs) => [].concat(...arrs);
function arrayMerge() { var arrs = Array.prototype.slice.call(arguments); return arrs.reduce((pre, next) => { return pre.concat(next); }); }
function arrayMerge() { var arr = new Array(); //将伪数组转换为真正的数组 var zArr = Array.prototype.slice.call(arguments); //console.log(zArr); for(var i=0;i<arguments.length;i++){ for(var j = 0;j<zArr[i].length;j++) arr.push(zArr[i][j]); } return arr; } var arr1 = [1,2,3]; var arr2 = [4,5,6]; var arr3 = [7,8,9] console.log(arrayMerge(arr1,arr2,arr3))