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Query EC2 tags from within instance
...stance_status = tags[0].value
else:
instance_status = None
logging.error('no status tag for '+region+' '+instance_id)
Any way to exit bash script, but not quitting the terminal
...urn and execute it as a shell script (e.g. sh run.sh), bash will report an error - return: can only return' from a function or sourced script`
– Tzunghsing David Wong
Sep 21 '18 at 0:32
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Difference between two dates in MySQL
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SELECT TIMESTAMPDIFF(HOUR,NOW(),'2013-05-15 10:23:23')
calculates difference in hour.(for days--> you have to define day replacing hour
SELECT DATEDIFF('2012-2-2','2012-2-1')
SELECT TO_DAYS ('2012-2-2')-TO_DAYS('2012-2-1')
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Programmatically saving image to Django ImageField
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I am getting error like this : prohibited to prevent data loss due to unsaved related object 'stream'.
– Dipak
Jun 17 '16 at 9:01
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How To Set Up GUI On Amazon EC2 Ubuntu server
...after rebooting the machine, ssh stopped connecting with connection timout error. Do you have any idea why its happening?
– Shan Khan
Oct 2 '18 at 10:26
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How to index into a dictionary?
... d.values()[i] or d.items()[i]. (Note that these methods create a list of all keys, values or items in Python 2.x. So if you need them more then once, store the list in a variable to improve performance.)
If you do care about the order of the entries, starting with Python 2.7 you can use collecti...
Is it possible to start a shell session in a running container (without ssh)
...tainer" bash (doc)
Previously, the answer to this question was:
If you really must and you are in a debug environment, you can do this: sudo lxc-attach -n <ID>
Note that the id needs to be the full one (docker ps -notrunc).
However, I strongly recommend against this.
notice: -notrunc is de...
How do you format an unsigned long long int using printf?
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this should to the top! - one small update: error: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wreserved-user-defined-literal]
– tofutim
Aug 27 '18 at 19:05
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JavaScript DOM remove element
...e's a slightly more succinct way of removing an element from the DOM than calling .removeChild(element) on its parent, which is to just call element.remove(). In due course, this will probably become the standard and idiomatic way of removing an element from the DOM.
The .remove() method was added ...
Delegates in swift?
...self, text: colorLabel.text) //assuming the delegate is assigned otherwise error
}
Step 4: Adopt the protocol in the receiving class
class ViewController: UIViewController, FooTwoViewControllerDelegate {
Step 5: Implement the delegate method
func myVCDidFinish(_ controller: FooTwoViewControlle...