書名： Perl 6 Deep Dive
作者名： Andrew Shitov
本章字數： 179字
更新時間： 2021-07-03 00:05:55

Using the DateTime data type

The usage of the DateTime data type is very similar to working with the Date type. In the DateTime objects, new fields to deal with time appear. We can see that in the following code snippet:

my $dt = DateTime.new(
    year   => 2017,
    month  => 7,
    day    => 19,
    hour   => 1,
    minute => 46,
    second => 48);

say $dt;        # 2017-07-19T01:46:48Z

say $dt.year;   # 2017
say $dt.month;  # 7
say $dt.day;    # 19

say $dt.hour;   # 1
say $dt.minute; # 46
say $dt.second; # 48

To create a new DateTime object and set it to the current moment, use the now constructor, as shown here:

my $dt = DateTime.now;
say $dt; # 2017-07-19T01:44:00.301537+02:00

The hh-mm-ss and yyyy-mm-dd methods generate formatted strings for time and date:

say $dt.yyyy-mm-dd; # 2017-07-19
say $dt.hh-mm-ss;   # 01:45:44

Be careful with printing seconds. The second method returns a floating-point number containing fractions of a second. To get an integer value, use the whole-second method:

my $now = DateTime.now;
say $now.second;       # 43.3285570144653
say $now.whole-second; # 43

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Perl 6 Deep Dive

Using the DateTime data type