方法一:
parseInt([1, 3, 5, 7, 9].join(""));//13579
方法二:
var arr = [1, 3, 5, 7, 9];
arr.reduce(function (x, y) {
return x * 10 + y;
});//13579
方法一:
parseInt([1, 3, 5, 7, 9].join(""));//13579
方法二:
var arr = [1, 3, 5, 7, 9];
arr.reduce(function (x, y) {
return x * 10 + y;
});//13579