cpan

cpan install of DBD::mysql failing on tests and symbol not found. OSX Mojave

由 佐手、 提交于 2020-08-03 05:49:07
问题 This looks like it's been around for years - but I can't find anything recent and related to Mac, and dealing only with just installing the CPAN module DBD::mysql I've been trawling the internet for days now... # Failed test 'use DBD::mysql;' # at t/00base.t line 15. # Tried to use 'DBD::mysql'. # Error: Can't load '/Users/robert/.cpanm/work/1542100720.91387/DBD-mysql-4.048/blib/arch/auto/DBD/mysql/mysql.bundle' for module DBD::mysql: dlopen(/Users/robert/.cpanm/work/1542100720.91387/DBD

cpan “Set::IntervalTree ” or “Algorithm::ExpectationMaximization” doesn't work - I explain below the complete error log

由 丶灬走出姿态 提交于 2020-07-31 04:34:47
问题 Here I explain more about troubles installing some Perl libraries: trouble installing Set::IntervalTree ** I installed g++ - still the same issue ** I installed miniconda, and tried to conda the package - still having the same issue here are the complete error logs: ** I copy part of it - as it is too long! cpan Set::IntervalTree Can't locate ExtUtils/CppGuess.pm in @INC (@INC contains: C:/Strawberry/perl/site/lib C:/Strawberry/perl/vendor/lib C:/Strawberry/perl/lib .) at Makefile.PL line 11.

cpan “Set::IntervalTree ” or “Algorithm::ExpectationMaximization” doesn't work - I explain below the complete error log

由 我的梦境 提交于 2020-07-31 04:33:08
问题 Here I explain more about troubles installing some Perl libraries: trouble installing Set::IntervalTree ** I installed g++ - still the same issue ** I installed miniconda, and tried to conda the package - still having the same issue here are the complete error logs: ** I copy part of it - as it is too long! cpan Set::IntervalTree Can't locate ExtUtils/CppGuess.pm in @INC (@INC contains: C:/Strawberry/perl/site/lib C:/Strawberry/perl/vendor/lib C:/Strawberry/perl/lib .) at Makefile.PL line 11.

1.浅谈标记语言markdown

由 自古美人都是妖i 提交于 2020-07-29 05:42:08
Markdown简介  Markdown是一种轻量级标记语言，创始人为约翰·格鲁伯(英语：John Gruber)。它允许人们使用易读易写的纯文本格式编写文档，然后转换成有效的XHTML（或者HTML）文档。这种语言吸收了很多在电子邮件中已有的纯文本标记的特性。  由于Markdown的轻量化、易读易写特性，并且对于图片，图表、数学式都有支持，目前许多网站都广泛使用Markdown来撰写帮助文档或是用于论坛上发表消息。如GitHub、Reddit、Diaspora、Stack Exchange、OpenStreetMap 、SourceForge、简书等，甚至还能被使用来撰写电子书。 历史  John Gruber在2004年创造了Markdown语言，在语法上有很大一部分是跟亚伦·斯沃茨（Aaron Swartz）共同合作的。这个语言的目的是希望大家使用“易于阅读、易于撰写的纯文字格式，并选择性的转换成有效的XHTML（或是HTML）”。 其中最重要的设计是可读性，也就是说这个语言应该要能直接在字面上的被阅读，而不用被一些格式化指令标记（像是RTF与HTML）。 因此，它是现行电子邮件标记格式的惯例，虽然它也借鉴了很多早期的标记语言，如：Setext、Texile、reStructuredText。Gruber也编写了Perl脚本：Markdown.pl

Where does CPAN install modules?

由 早过忘川 提交于 2020-07-20 07:07:01
问题 I can't find an authoritative/comprehensive description of where CPAN installs its files. I assume there must be a set of rules and that it's not as simple as "XYZ directory" because, for example, multiple users on a Linux box can run CPAN even though there's a single Perl installation and it still somehow works. So, what are those rules? A second part of this question: The documentation for the PERL5LIB environment variable says that it is "A list of directories in which to look for Perl

Where does CPAN install modules?

由 左心房为你撑大大i 提交于 2020-07-20 07:05:06
问题 I can't find an authoritative/comprehensive description of where CPAN installs its files. I assume there must be a set of rules and that it's not as simple as "XYZ directory" because, for example, multiple users on a Linux box can run CPAN even though there's a single Perl installation and it still somehow works. So, what are those rules? A second part of this question: The documentation for the PERL5LIB environment variable says that it is "A list of directories in which to look for Perl

To Convert CSV File to Hash Structure using TEXT::CSV_XS Module in perl

由 时光毁灭记忆、已成空白 提交于 2020-06-29 06:39:12
问题 I've below code which is used to read a csv file and convert to hash. The Keys are dependent on the number of key columns that user need. use warnings; use strict; my %hash; my $KeyCols = 2; while (<DATA>) { chomp; my @cols = split /,/, $_, $KeyCols+1; next unless @cols > $KeyCols; my $v = pop @cols; my $k = join '', @cols; $hash{$k} = $v; } I need help in achieving the same logic using TEXT::CSV_XS package for efficiency. Please help. 回答1: The real reason for using Text::CSV_XS is for

Perl进程间数据共享

由 99封情书 提交于 2020-04-13 15:53:41
【今日推荐】：为什么一到面试就懵逼！>>> 本文介绍的Perl进程间数据共享内容主体来自于《Pro Perl》的第21章。 IPC简介 通过fork创建多个子进程时，进程间的数据共享是个大问题，要么建立一个进程间通信的通道，要么找到一个两进程都引用的共享变量。本文将介绍Unix IPC的近亲System V IPC：message queues(消息队列)、semaphores(信号量)和shared memory-segments(共享内存段)。它们都是IPC结构，它们被非常广泛地应用于进程间通信。它们的帮助文档可参见： $ perldoc IPC::Msg $ perldoc IPC::Semaphore $ perldoc IPC::SharedMem 但是，并非所有操作系统都支持System V IPC，对于那些不遵守POSIX规范的平台就不支持。当然，也并非一定要在Unix操作系统上才能使用IPC，只要操作系统支持IPC就可以，而且就算是Unix系统上也并非一定支持IPC，可以使用 ipcs 命令来查看是否支持： $ ipcs ------ Message Queues -------- key msqid owner perms used-bytes messages ------ Shared Memory Segments -------- key shmid

ubuntu16.04上安装graphy-easy

由 柔情痞子 提交于 2020-04-06 15:01:49
Graph::Easy 是一个处理图形DSL的Perl模块，它有如下功能： 提供了一种易懂，可读性很强的图形描述语言 一种支持 ASCII Art 的基于网格的布局器 可以导出为 Graphviz, VCG (Visualizing Compiler Graphs), GDL (Graph Description LAnguages) 和 GraphML 格式。 可以从 Graphviz, VCG 和 GDL 导入图像。 一下两种方式安装它 安装 执行：sudo apt-get install cflow graphviz 安装Graph::Easy 执行：sudo perl -MCPAN -e shell 输入y后即可进入以下界面： 执行：install Graph::Easy 等待片刻 2.源码安装 点击下载源码，执行tar xzvf Graph-Easy-0.76.tar.gz,只有进入解压的文件夹，执行perl Makefile.PL graph-Easy 再执行make &&sudo make install 点赞 收藏 分享 文章举报 Achou.Wang 博客专家 发布了370 篇原创文章 · 获赞 153 · 访问量 34万+ 他的留言板 关注 来源： oschina 链接： https://my.oschina.net/u/4402671/blog/3216110

dmake not found when installing Perl module using CPAN

由 拈花ヽ惹草 提交于 2020-02-24 16:54:50
问题 I installed Perl from ActiveState. Plain version with no extensions. Windows 10. "This is perl 5, version 28, subversion 1 (v5.28.1) built for MSWin32-x64-multi-thread" A pre-existing perl script that I need to use accesses PostScript::Simple so I need to add that to my install. Supposedly, the right way to do this is to open cpan and run the command "install PostScript::Simple". However, it eventually fails with a dmake error. I've tried cpan install dmake and appears to be trying to do so,
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