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Entity Framework. Delete all rows in table
... not SQL Engine(R/DBM) specific.
This assumes that you're doing this for testing or some similar situation.
Either
The amount of data is small or
The performance doesn't matter
Simply call:
VotingContext.Votes.RemoveRange(VotingContext.Votes);
Assuming this context:
public class Votin...
scp (secure copy) to ec2 instance without password
...om a local server to a remote server
sudo scp -i my-pem-file.pem ./source/test.txt ec2-user@1.2.3.4:~/destination/
copy a file from a remote server to a local machine
sudo scp -i my-pem-file.pem ec2-user@1.2.3.4:~/source/of/remote/test.txt ./where/to/put
So the basically syntax is:-
scp -i my...
Difference between single and double square brackets in Bash
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Single [] are posix shell compliant condition tests.
Double [[]] are an extension to the standard [] and are supported by bash and other shells (e.g. zsh, ksh). They support extra operations (as well as the standard posix operations). For example: || instead of -o and r...
How can I pretty-print JSON in a shell script?
...me issue, try this value: 1e1000. Note that python -mjson.tool fails this test badly in that it produces Infinity, which is not even JSON.
– peak
Sep 4 '15 at 2:38
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Greenlet Vs. Threads
...t to spawn 60000 native threads or processes to complete the work and this test shows nothing (also did you take the timeout off of the gevent.joinall() call?). Try using a thread pool of about 50 threads, see my answer: stackoverflow.com/a/51932442/34549
– zzzeek
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Checking if sys.argv[x] is defined
...
In the end, the difference between try, except and testing len(sys.argv) isn't all that significant. They're both a bit hackish compared to argparse.
This occurs to me, though -- as a sort of low-budget argparse:
arg_names = ['command', 'x', 'y', 'operation', 'option']
args...
How to pass arguments from command line to gradle
...
Thanks for letting me know! Changing name to testngGroup fixed the problem. Found a list of predefined properties in table 13.1 at gradle.org/docs/current/userguide/writing_build_scripts.html.
– Lidia
Jul 31 '12 at 23:50
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How to delete a file from SD card?
...thesized permissions."
However nasty workaround exists (see code below). Tested on Samsung Galaxy S4, but this fix does't work on all devices. Also I wouldn’t count on this workaround being available in future versions of Android.
There is a great article explaining (4.4+) external storage perm...
What does the question mark operator mean in Ruby?
... a ternary operator, converting a character to its ASCII integer, usage in test, in RegEx'es, etc.) many of which are covered in the other answers here.
– Karl Wilbur
Sep 11 '15 at 20:36
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Deleting Objects in JavaScript
...'
delete x.y; // deletes the property
alert(x.y); // shows 'undefined'
(Tested in Firefox.)
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