Javascript日期数组 - 没有正确迭代（jquery ui datepicker）

I have some code which builds an array of date ranges. I then call a function (from the jquery UI datepicker), passing it a date, and compare that date with dates in the array. I'm doing it this way because the dates are stored in a cms and this is the only way I can output them.I have some code which builds an array of date