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What is the purpose of Rank2Types?

I am not really proficient in Haskell, so this might be a very easy question. 6 Answers ...
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Remove duplicate lines without sorting [duplicate]

...e unique lines. This of course could end up being the whole file though if all the lines are unique. – deltaray Jul 11 '18 at 17:33  |  show 1...
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Effects of changing Django's SECRET_KEY

...t know about 1.4, it's a matter of taking a look at the code. I pointed at all the sources for each point, you can take a look at "protect session data and create random session keys". It's normal you're still logged in but you won't be able to read the data contained in the session as SECRET_KEY is...
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Django templates: verbose version of a choice

... (universal), though - unless you know a way to iterate in a template over all get_FOO_display methods of a model object :) I'm a bit too lazy for writing non-generic templates ;) Moreover, the docs say it's a model instance's method. Therefore it'd have to be a model form bound to an existing obj...
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Send email with PHPMailer - embed image in body

...PHPMailer, with images. The body is loaded from a html file, that contains all the info. 2 Answers ...
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How to log source file name and line number in Python

...='%Y-%m-%d:%H:%M:%S', level=logging.DEBUG) logger = logging.getLogger(__name__) logger.debug("This is a debug log") logger.info("This is an info log") logger.critical("This is critical") logger.error("An error occurred") Generates this output: 2017-06-06:17:07:02,158 DEBUG [log.py:11] Thi...
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How to get a Docker container's IP address from the host

...n. Maybe provide two examples clearly labelled Linux and Windows. I literally just typed the example, checked the docs which also uses single quotes and then Googled the error. I'm sure I'm not alone. – Wyck Apr 15 '19 at 18:42 ...
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How to find gaps in sequential numbering in mysql?

...rks on table of any size (not just on 100 rows): SELECT (t1.id + 1) as gap_starts_at, (SELECT MIN(t3.id) -1 FROM arrc_vouchers t3 WHERE t3.id > t1.id) as gap_ends_at FROM arrc_vouchers t1 WHERE NOT EXISTS (SELECT t2.id FROM arrc_vouchers t2 WHERE t2.id = t1.id + 1) HAVING gap_ends_at IS ...
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How to export query result to csv in Oracle SQL Developer?

... @topr Use method 1, then select all, copy and paste into a text editor and save as csv. You might even be able to paste directly into Excel, but I'm not sure about that. – Travis Jan 3 '14 at 20:08 ...
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CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...|grep squid 3.2 如果未安装,则使用yum 方式安装 # yum -y install squid 3.3 设置开机自启动 # chkconfig --level 35 squid on //在3、5级别上自动运行squid服务 四、squid服务器的配置文件说明 squid 的主配置文件是 /etc/squid/squid.conf,...