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Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
...tation of JSR 303, however, it intelligently picks up on these constraints and translates them into database constraints for you, so you get two for the price of one. @Column(nullable = false) is the JPA way of declaring a column to be not-null. I.e. the former is intended for validation and the lat...
Proper way to exit iPhone application?
I am programming an iPhone app, and I need to force it to exit due to certain user actions. After cleaning up memory the app allocated, what's the appropriate method to call to terminate the application?
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Exception handling in R [closed]
Does anyone have examples/tutorials of exception handling in R? The official documentation is very terse.
5 Answers
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jQuery text() and newlines
... point is to use CSS white-space: pre-line or white-space: pre-wrap. Clean and elegant. The lowest version of IE that supports the pair is 8.
https://css-tricks.com/almanac/properties/w/whitespace/
P.S. Until CSS3 become common you'd probably need to manually trim off initial and/or trailing white...
Passing a string with spaces as a function argument in bash
...
you should put quotes and also, your function declaration is wrong.
myFunction()
{
echo "$1"
echo "$2"
echo "$3"
}
And like the others, it works for me as well. Tell us what version of shell you are using.
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pull/push from multiple remote locations
The short: is there a way to have a git repo push to and pull from a list of remote repos (rather than a single "origin")?
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CRON job to run on the last day of the month
...ed to find another way.
However, it's usually both substantially easier and correct to run the job as soon as possible on the first day of each month, with something like:
0 0 1 * * myjob.sh
and modify the script to process the previous month's data.
This removes any hassles you may encounter...
How to convert JSON data into a Python object
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UPDATE
With Python3, you can do it in one line, using SimpleNamespace and object_hook:
import json
from types import SimpleNamespace
data = '{"name": "John Smith", "hometown": {"name": "New York", "id": 123}}'
# Parse JSON into an object with attributes corresponding to dict keys.
x = json.lo...
UTF-8 all the way through
I'm setting up a new server and want to support UTF-8 fully in my web application. I have tried this in the past on existing servers and always seem to end up having to fall back to ISO-8859-1.
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EOFError: end of file reached issue with Net::HTTP
..._url.port)
http.use_ssl = true
Note the additional http.use_ssl = true.
And the more appropriate code which would handle both http and https will be similar to the following one.
url = URI.parse(domain)
req = Net::HTTP::Post.new(url.request_uri)
req.set_form_data({'name'=>'Sur Max', 'email'=&...