perl

问题 I installed the new ActiveState Perl custom build with Perl 5.28 and I added the module (DBD-mysql v4.50). The DBI module is set by default to the ActivePerl 5.28 compilation. use strict; use warnings; use diagnostics; use DBI; ### INIT DB CONNECTION my $dbh = DBI->connect("DBI:mysql:database=testdb;host=localhost","root", "XXXX",{'RaiseError' => 1,'mysql_auto_reconnect' => 1}); $dbh->{InactiveDestroy} = 1; $dbh->{mysql_auto_reconnect} = 1; then I get the following error: >perl test.pl

问题 Anyone has ever programmed a PHP (or Perl) function to get the ceiling value Excel style? 回答1: This should be the answer, from php.net comments: // MS Excel function: Ceiling( number, significance ) // duplicates m$ excel's ceiling function if( !function_exists('ceiling') ) { function ceiling($number, $significance = 1) { return ( is_numeric($number) && is_numeric($significance) ) ? (ceil($number/$significance)*$significance) : false; } } echo ceiling(0, 1000); // 0 echo ceiling(1, 1); //

问题 Anyone has ever programmed a PHP (or Perl) function to get the ceiling value Excel style? 回答1: This should be the answer, from php.net comments: // MS Excel function: Ceiling( number, significance ) // duplicates m$ excel's ceiling function if( !function_exists('ceiling') ) { function ceiling($number, $significance = 1) { return ( is_numeric($number) && is_numeric($significance) ) ? (ceil($number/$significance)*$significance) : false; } } echo ceiling(0, 1000); // 0 echo ceiling(1, 1); //

问题 I tried to play with Strawberry Perl, and one of the things that stumped me was reading the files. I tried to do: open(FH, "D:\test\numbers.txt"); But it can not find the file (despite the file being there, and no permissions issues). An equivalent code (100% of the script other than the filename was identical) worked fine on Linux. 回答1: As per Perl FAQ 5, you should be using forward slashes in your DOS/Windows filenames (or, as an alternative, escaping the backslashes). Why can't I use "C:

问题 I tried to play with Strawberry Perl, and one of the things that stumped me was reading the files. I tried to do: open(FH, "D:\test\numbers.txt"); But it can not find the file (despite the file being there, and no permissions issues). An equivalent code (100% of the script other than the filename was identical) worked fine on Linux. 回答1: As per Perl FAQ 5, you should be using forward slashes in your DOS/Windows filenames (or, as an alternative, escaping the backslashes). Why can't I use "C:

问题 I tried to play with Strawberry Perl, and one of the things that stumped me was reading the files. I tried to do: open(FH, "D:\test\numbers.txt"); But it can not find the file (despite the file being there, and no permissions issues). An equivalent code (100% of the script other than the filename was identical) worked fine on Linux. 回答1: As per Perl FAQ 5, you should be using forward slashes in your DOS/Windows filenames (or, as an alternative, escaping the backslashes). Why can't I use "C:

问题 I’d like to match any GET request in Mojolicious::Lite. The code looks like this: get '.*' => sub { my $self = shift; $self->render(text => 'Nothing to see here, move along.'); }; This dies with “Modification of non-creatable array value attempted” at MojoX::Routes::Pattern.pm, line 301. I tried other arguments to get , like qr// . That works for / , but does not match /foo . I also tried to peek at the source, but I’m none the wiser. Are you? 回答1: I think you want: get '/(*restofpath)' => ..

问题 I am still learning Perl, so apologies if this is an obvious question. Is there a way to match text that is NOT enclosed by parenthesis? For example, searching for foo would match the second line only. (bar foo bar) bar foo ( bar foo (bar) (foo) ) 回答1: This is very far from "obvious"; on the contrary. There is no direct way to say "don't match" for a complex pattern (there is good support at a character level, with [^a] , \S etc). Regex is firstly about matching things, not about not-matching

问题 I'm looking for a way to match only fully composed characters in a Unicode string. Is [:print:] dependent upon locale in any regular expression implementation that incorporates this character class? For example, will it match Japanese character 'あ', since it is not a control character, or is [:print:] always going to be ASCII codes 0x20 to 0x7E? Is there any character class, including Perl REs, that can be used to match anything other than a control character? If [:print:] includes only

问题 I'd like to do the CGI programming with Apache and Perl in Max OS X 10.8.5. I followed the guide : CGI Programming With Apache and Perl on Mac OS X. The steps are: edit /etc/apache2/httpd.conf, uncomment the following: AddHandler cgi-script .cgi .pl AddType text/html .shtml AddOutputFilter INCLUDES .shtml edit /etc/apache2/userName.conf: Options MultiViews Indexes SymLinksIfOwnerMatch Includes ExecCGI DirectoryIndex index.html index.cgi AllowOverride None Order allow,deny Allow from all start