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List of installed gems?

... Gem::Requirement.default) specs = Gem.source_index.search(dep) puts specs[0..5].map{ |s| "#{s.name} #{s.version}" } # >> Platform 0.4.0 # >> abstract 1.0.0 # >> actionmailer 3.0.5 # >> actionpack 3.0.5 # >> activemodel 3.0.5 # >> activerecord 3.0.5 Here's an ...
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Get a pixel from HTML Canvas?

... 10 Answers 10 Active ...
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Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...

...务器,公司全部员工使用统一的域名,内网IP为:192.168.0.115 操作系统:RHEL5 所用软件列表: mysql-5.5.20 postfix-2.9.1 courier-authlib-0.62.4.tar.bz2 extmail-1.2.tar.gz extman-1.1.tar.gz Unix-Syslog-1.1.tar.gz perl-GD-2.35-1.el5.rf.i386.rpm rr...
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How to call Makefile from another Makefile?

...led /path/to/project/makefile and one called /path/to/project/gtest-1.4.0/make/Makefile . I'm attempting to have the former call the latter. In /path/to/project/makefile, I have ...
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Get the current year in JavaScript

...ily: sans-serif; } <footer> © <span id="year">2018</span> by FooBar </footer> share | improve this answer | follow ...
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How does a garbage collector avoid an infinite loop here?

... 110 As per Richter in the second edition of CLR via C# (yes I need to update): Page 478 For (Th...
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Are default enum values in C the same for all compilers?

...ng an enum as shown below, do all C compilers set the default values as x=0 , y=1 , and z=2 on both Linux and Windows systems? ...
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Convert a float64 to an int in Go

...to an int truncates the float, which if your system internally represent 2.0 as 1.9999999999, you will not get what you expect. The various printf conversions deal with this and properly round the number when converting. So to get a more accurate value, the conversion is even more complicated than...
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How can I programmatically get the MAC address of an iphone

...tIPAddresses(); GetHWAddresses(); int i; NSString *deviceIP = nil; for (i=0; i<MAXADDRS; ++i) { static unsigned long localHost = 0x7F000001; // 127.0.0.1 unsigned long theAddr; theAddr = ip_addrs[i]; if (theAddr == 0) break; if (theAddr == localHost) continue; N...
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SVG drop shadow using css3

...ow. Relevant bits from the example: <filter id="dropshadow" height="130%"> <feGaussianBlur in="SourceAlpha" stdDeviation="3"/> <!-- stdDeviation is how much to blur --> <feOffset dx="2" dy="2" result="offsetblur"/> <!-- how much to offset --> <feComponentTran...