使用 perl 获取上周数据的正则表达式
regex expression to fetch last week data using perl
我有一个 Perl 脚本,它将在一个 csv 文件中生成输出。 Perl 脚本按月提供输出并在每个星期四执行。请查看我放入 perl 脚本中的正则表达式。
'{"Date":{"$regex":/^(0[1-9]|[12][0-9]|3[01])-10-2017/i}}'
但是一旦生成此输出,我需要复制上周数据(例如 10 月 12 日至 18 日)并需要发送给会员。所以我想要这样的正则表达式,它会根据上周的输出向我发送一个。(上周并发)
可以生成如下所示的正则表达式:
use strict;
use warnings;
use POSIX qw/strftime/;
my $now = time;
my @dates;
push @dates, strftime "%d-%m-%Y", localtime($now - $_ * 86_400 ) for (0..6);
my $regex_string = '(' . join( '|', @dates) . ')';
希望对你有用
I am aware of the problem one could potentially have with this, when
it's just after the moment Daylight Saving Time would start -- if
that is really a problem, then iterate over a for
loop for 13 times,
with steps of 43.200 seconds, which is half a day decrements.
我有一个 Perl 脚本,它将在一个 csv 文件中生成输出。 Perl 脚本按月提供输出并在每个星期四执行。请查看我放入 perl 脚本中的正则表达式。
'{"Date":{"$regex":/^(0[1-9]|[12][0-9]|3[01])-10-2017/i}}'
但是一旦生成此输出,我需要复制上周数据(例如 10 月 12 日至 18 日)并需要发送给会员。所以我想要这样的正则表达式,它会根据上周的输出向我发送一个。(上周并发)
可以生成如下所示的正则表达式:
use strict;
use warnings;
use POSIX qw/strftime/;
my $now = time;
my @dates;
push @dates, strftime "%d-%m-%Y", localtime($now - $_ * 86_400 ) for (0..6);
my $regex_string = '(' . join( '|', @dates) . ')';
希望对你有用
I am aware of the problem one could potentially have with this, when it's just after the moment Daylight Saving Time would start -- if that is really a problem, then iterate over a
for
loop for 13 times, with steps of 43.200 seconds, which is half a day decrements.