将日期对象转换为 R 中的 unix 时间戳？

Question

Usually we see people converting unix-timestamps into date objects - is it possible to do the reverse instead?

For example, given the following date

12-02-2019 00:00:00

convert this into unix time achieving the following value:

1549929600

Is this possible within r ? Potentially there could be something in lubridate or tidyverse but I have not figured it out yet. Thanks for the help.

Answer 1

找到答案很简单：

as.numeric(as.POSIXct("12-02-2019 00:00:00 EST"))