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How to check whether dynamically attached event listener exists or not?
...);
}
Creating special attribute for an element when listener is attached and then checking if it exist.
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Get Output From the logging Module in IPython Notebook
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Does basic configuration for the logging system by creating a
StreamHandler with a default Formatter and adding it to the root
logger. The functions debug(), info(), warning(), error() and
critical() will call basicConfig() automatically if no handlers are
defined for the root logger.
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What is causing ERROR: there is no unique constraint matching given keys for referenced table?
...R: there is no unique constraint matching given keys for referenced table, and having stared at it for while now I can't figure out why this error arises in this situation.
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SmtpException: Unable to read data from the transport connection: net_io_connectionclosed
...anted to also offer encryption they were assigned a different port number, and on that port number they immediately initiated an SSL connection. As time went on they realized it was silly to waste two port numbers for one service and they devised a way for services to allow plaintext and encryption ...
Thread-safe List property
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Like List<T> and unlike Dictionary, ConcurrentBag accepts duplicates.
– The Light
May 24 '12 at 9:17
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Storing SHA1 hash values in MySQL
...d just waste an additional byte for the length of the fixed-length field.
And I also wouldn’t store the value the SHA1 is returning. Because it uses just 4 bit per character and thus would need 160/4 = 40 characters. But if you use 8 bit per character, you would only need a 160/8 = 20 character l...
How to get a list of installed android applications and pick one to run
...sked a similar question to this earlier this week but I'm still not understanding how to get a list of all installed applications and then pick one to run.
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Find a commit on GitHub given the commit hash
I am fairly new to Github and have come across an amateur-ish problem.
3 Answers
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What does (angle brackets) mean in Java?
I am currently studying Java and have recently been stumped by angle brackets(). What exactly do they mean?
6 Answers
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How to generate a Dockerfile from an image?
... -sV=1.36 nginx:latest
It will pull the target docker image automaticlaly and export Dockerfile. Parameter -sV=1.36 is not always required.
Reference: https://hub.docker.com/repository/docker/alpine/dfimage
below is the old answer, it doesn't work any more.
$ docker pull centurylink/dockerfile-from...