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Error while installing json gem 'mkmf.rb can't find header files for ruby'
...ll ruby2.0-dev
sudo apt-get install ruby2.2-dev
sudo apt-get install ruby2.3-dev
or, generic way:
sudo apt-get install ruby-dev
or
sudo apt-get install ruby`ruby -e 'puts RUBY_VERSION[/\d+\.\d+/]'`-dev
The first link you’ve posted is exactly your case: there is no ruby development...
Python UTC datetime object's ISO format doesn't include Z (Zulu or Zero offset)
...etime.utcnow().replace(tzinfo=simple_utc()).isoformat()
'2014-05-16T22:51:53.015001+00:00'
Note that this DOES conform to the ISO 8601 format, which allows for either Z or +00:00 as the suffix for UTC. Note that the latter actually conforms to the standard better, with how time zones are represent...
Simple basic explanation of a Distributed Hash Table (DHT)
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3 Answers
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Keyboard shortcut to comment lines in Sublime Text 3
...u Edit > Comment these shortcuts should be valid, but in Sublime Text 3 (build 3047) they no longer seem to work. Does anybody know the right default keyboard shortcuts for Linux and MacOS? Or is it a bug?
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Using helpers in model: how do I include helper dependencies?
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134
Just change the first line as follows :
include ActionView::Helpers
that will make it works....
How to programmatically display version/build number of target in iOS app?
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394
There are 2 Numbers!
The marketing release number is for the customers, called version number...
Find and replace string values in list
... a float/integer?
– Patriots299
Dec 31 '18 at 20:38
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Flushing footer to bottom of the page, twitter bootstrap
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34 Answers
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Is there a simple way to remove multiple spaces in a string?
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Francisco Couzo
8,04633 gold badges2929 silver badges3737 bronze badges
answered Oct 9 '09 at 21:52
Josh LeeJosh Lee
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