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Difference between SRC and HREF
...myself.
For example:
Absolute URL with script element: <script src="http://googleapi.com/jquery/script.js"></script>
Relative URL with img element : <img src="mypic.jpg">
HREF(Hypertext REFerence) -- I want to refer to this resource for someone else.
For example:
Abso...
Jackson how to transform JsonNode to ArrayNode without casting?
... ClassCastException, the old version will throw JSONException. Reference: http://www.json.org/javadoc/org/json/JSONObject.html#getJSONArray(java.lang.String)
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jQuery .hasClass() vs .is()
...turns out that what I had said is the correct answer. Here is the result:
http://jsperf.com/hasclass-vs-is-so
The is is multi-purpose, you can for example do is('.class'), is(':checked'), etc which means is has more to do where is hasClass is limited which only checks for a class being set or not....
Updating packages in Emacs
...able has fewer packages than Melpa.
Org mode has its own package.el repo (http://orgmode.org/elpa/).
All of the package repos work the same, you just add them to your package-archives.
Here's a more in-depth blog post about this subject, which I mostly agree with.
I'm not sure, but I think if a p...
How to modify PATH for Homebrew?
... your error.
This blog post helped me out in resolving issues I ran into. http://moncefbelyamani.com/how-to-install-xcode-homebrew-git-rvm-ruby-on-mac/
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Age from birthdate in python
...t(True) is 1 and int(False) is 0:
from datetime import date
def calculate_age(born):
today = date.today()
return today.year - born.year - ((today.month, today.day) < (born.month, born.day))
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mysql Foreign key constraint is incorrectly formed error
...ISAM engine. It's a silly mistake, which I fixed with:
ALTER TABLE parent_table ENGINE=InnoDB;
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Visual Studio 2012 Web Publish doesn't copy files
...user on the fly the xml looks like:
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
</Project>
When you create a new profile it creates xml that looks like:
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2...
Ruby, Difference between exec, system and %x() or Backticks
...ll. Here Open3.popen3 comes in handy:
require 'open3'
Open3.popen3("curl http://example.com") do |stdin, stdout, stderr, thread|
pid = thread.pid
puts stdout.read.chomp
end
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(13: Permission denied) while connecting to upstream:[nginx]
...my issue was due to SELinux.
This should solve the problem:
setsebool -P httpd_can_network_connect 1
Details
I checked for errors in the SELinux logs:
sudo cat /var/log/audit/audit.log | grep nginx | grep denied
And found that running the following commands fixed my issue:
sudo cat /var/log...