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Forward host port to docker container
Is it possible to have a Docker container access ports opened by the host? Concretely I have MongoDB and RabbitMQ running on the host and I'd like to run a process in a Docker container to listen to the queue and (optionally) write to the database.
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JavaScript before leaving the page
... to show a prompt before the user leaves the page, use onbeforeunload:
window.onbeforeunload = function(){
return 'Are you sure you want to leave?';
};
Or with jQuery:
$(window).bind('beforeunload', function(){
return 'Are you sure you want to leave?';
});
This will just ask the user if th...
Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I
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do you have any idea what the technical reason is for not allowing it? I can't find any info on this.
– jtate
Feb 15 '19 at 21:29
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How do I determine if my python shell is executing in 32bit or 64bit?
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One way is to look at sys.maxsize as documented here:
$ python-32 -c 'import sys;print("%x" % sys.maxsize, sys.maxsize > 2**32)'
('7fffffff', False)
$ python-64 -c 'import sys;print("%x" % sys.maxsize, sys.maxsize > 2**32)'
('7fffffffffffffff', True)
sy...
eval command in Bash and its typical uses
...utput. Since $n evaluates to 1, $($n) attempts to run the command 1, which does not exist.
eval echo \${$n} runs the parameters passed to eval. After expansion, the parameters are echo and ${1}. So eval echo \${$n} runs the command echo ${1}.
Note that most of the time, you must use double quotes ...
How do we control web page caching, across all browsers?
...cedence over Expires, so it's after all for HTTP 1.0 proxies only.
If you don't care about IE6 and its broken caching when serving pages over HTTPS with only no-store, then you could omit Cache-Control: no-cache.
Cache-Control: no-store, must-revalidate
Pragma: no-cache
Expires: 0
If you don't c...
Can you issue pull requests from the command line on GitHub?
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Does it work without having Github forked the repo first, ie from a direct clone of the source repo?
– Hari Karam Singh
Jan 7 '13 at 11:19
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Using global variables between files?
...ttings
def stuff():
settings.myList.append('hey')
Note that subfile does not call init()— that task belongs to main.py:
# main.py
import settings
import subfile
settings.init() # Call only once
subfile.stuff() # Do stuff with global var
print settings.myList[0] # Check t...
How do I get the path of a process in Unix / Linux
In Windows environment there is an API to obtain the path which is running a process. Is there something similar in Unix / Linux?
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jQuery Determine if a matched class has a given id
...a string selector:
$(".bar:first").is("#foo"); // TRUE if first '.bar' in document is also '#foo'
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