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Ruby: kind_of? vs. instance_of? vs. is_a?
...istrator, Ruby's all about the aesthetics. In fact, notice the grammatical error... with active support you can write @person.is_an? Administrator :)... That might have made it into Ruby core by now, actually.
– rfunduk
Oct 8 '10 at 19:18
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How do I avoid capturing self in blocks when implementing an API?
...ck, you could deal with it. The reason a retain cycle is a warning, not an error, is that they don't necessarily spell doom for your application. If MyDataProcessor is able to release the blocks when the operation is complete, before its parent would try to release it, the cycle will be broken and e...
Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...:
File "./my_script.py", line 2, in <module>
import json
ImportError: No module named json
The json module doesn't exist in Python 2.5.
One way to guard against that kind of problem is to use the versioned python command names that are typically installed with most Pythons:
$ cat my_...
What is the best way to ensure only one instance of a Bash script is running? [duplicate]
...(($(date '+%s') - ${time_beg})) -gt ${time_max} ] ; then
echo "Error: waited too long for lock file /tmp/global.lock" 1>&2
return 1
fi
sleep 1
done
return 0
}
function lockfile_release()
{
rm -f /tmp/global.lock
}
if ! lockfile_wa...
How to have an auto incrementing version number (Visual Studio)? [duplicate]
... will ALWAYS increase this way.
Newer versions of Visual Studio give this error:
(this thread begun in 2009)
The specified version string contains wildcards, which are not compatible with determinism. Either remove wildcards from the version string, or disable determinism for this compi...
How to loop over files in directory and change path and add suffix to filename
...
I believe there's an error in your code. The one line should be base=${name%.txt}, instead of base=${base%.txt}.
– caseklim
May 15 '14 at 1:16
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Optional query string parameters in ASP.NET Web API
...ll as default value, and use server side validation accordingly and return error messages back. It worked.
– Atta H.
May 10 '19 at 17:18
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Android Studio IDE: Break on Exception
...Visual Studio IDE. The class filters are to prevent all sorts of low-level errors from stopping the application much more frequently (especially during app initialization). As an example, follow the steps above, but without the class filters, then start the app in debug mode and see what happens.
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Java - JPA - @Version annotation
...stens to the message. I just want to avoid the unique constraint violation error..
– Manu
Jan 19 '16 at 6:28
Sorry, I ...
Give all the permissions to a user on a DB
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I have Postgres version 10.3 and it throws a syntax error when I use quotes around the database name.
– sajid
Sep 7 '18 at 9:31
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