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How to get the IP address of the docker host from inside a docker container
...meta-data for the host is still available from inside the container.
curl http://169.254.169.254/latest/meta-data/local-ipv4
For example:
$ docker run alpine /bin/sh -c "apk update ; apk add curl ; curl -s http://169.254.169.254/latest/meta-data/local-ipv4 ; echo"
fetch http://dl-cdn.alpinelinux...
Calling async method synchronously
... the scalability even more, as it incurs +1 more thread to process a given HTTP request.
ASP.NET has built-in support for asynchronous methods, either through asynchronous controllers (in ASP.NET MVC and Web API) or directly via AsyncManager and PageAsyncTask in classic ASP.NET. You should use it. ...
Solving “Who owns the Zebra” programmatically?
...ution in Python based on constraint-programming:
from constraint import AllDifferentConstraint, InSetConstraint, Problem
# variables
colors = "blue red green white yellow".split()
nationalities = "Norwegian German Dane Swede English".split()
pets = "birds dog cats horse zebra".sp...
Where is shared_ptr?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
“PKIX path building failed” and “unable to find valid certification path to requested target”
...
Go to URL in your browser:
firefox - click on HTTPS certificate chain (the lock icon right next to URL address). Click "more info" > "security" > "show certificate" > "details" > "export..". Pickup the name and choose file type example.cer
chrome - click on s...
Why is the order in dictionaries and sets arbitrary?
...der:
>>> {'bar': None, 'foo': None}
{'foo': None, 'bar': None}
All slots except 3 and 4 are empty, looping over the table first lists slot 3, then slot 4, so 'foo' is listed before 'bar'.
bar and baz, however, have hash values that are exactly 8 apart and thus map to the exact same slot...
When using a Settings.settings file in .NET, where is the config actually stored?
...e out about the hash in the folder name, I came across (via this answer):
http://blogs.msdn.com/b/rprabhu/archive/2005/06/29/433979.aspx
(edit: Wayback Machine link: https://web.archive.org/web/20160307233557/http://blogs.msdn.com:80/b/rprabhu/archive/2005/06/29/433979.aspx)
The exact path of ...
How do I get the path of the Python script I am running in? [duplicate]
....argv[0])
Py2exe does not provide an __file__ variable. For reference: http://www.py2exe.org/index.cgi/Py2exeEnvironment
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throw Error('msg') vs throw new Error('msg')
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Changing every value in a hash in Ruby
...
There is a new 'Rails way' method for this task :)
http://api.rubyonrails.org/classes/Hash.html#method-i-transform_values
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