Javascript相互減去時間跨度

Question

假設我有一個時間跨度{"start_time":"8:30", "end_time":"18:00"}

我想減去其他時間跨度，例如{"start_time":"12:30", "end_time":"14:00"}並得到以下結果：
[{"start_time":"8:30", "end_time":"12:30"},{"start_time":"14:00", "end_time":"18:00"}]

編輯：我還需要減去其他時間跨度，例如[{"start_time":"8:30", "end_time":"12:30"},{"start_time":"14:00", "end_time":"18:00"}] - {"start_time":"16:30", "end_time":"17:00"}應該給我[{"start_time":"8:30", "end_time":"12:30"},{"start_time":"14:00", "end_time":"16:30"},{"start_time":"17:00", "end_time":"18:00"}]

我想知道什么是最好的邏輯方法。

謝謝

Answer 1

function subtract(t1, t2){
     return [{'start_time': t1.start_time, 'end_time': t2.start_time}, 
               {'start_time': t2.end_time, 'end_time': t1.end_time}]
}