Polyglot CheatSheet - DateTime
Updated: 2020-09-18
Get Current Time
Javascript
var date = new Date();
// date
date.getDate();
// month(0-11)
date.getMonth() + 1;
// year(201x)
date.getFullYear();
// get previous day
date.setDate(date.getDate() - 1);
// get epoch
new Date() - new Date(0);
Bash
Suppose today is 2020-01-01
$ date +%Y%m%d
20200101
Get Running Time
Java
long start = System.currentTimeMillis();
method();
long end = System.currentTimeMillis();
System.out.println("Time used: " + (end – start));