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Return 0 if field is null in MySQL
...t to the insert/update.
This amortises the cost assuming your database is read more often than written (and most of them are).
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How does IPython's magic %paste work?
I want to copy already indented Python code / whole functions and classes into IPython. Everytime I try the indentation is screwed up and I get following error message:
...
bash assign default value
...e long names, the : approach would be prefereable, both for typing and for reading. Yes, this seems like an area where Bash could use a little improvement.
– Dan Moulding
Feb 13 '14 at 15:02
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An “and” operator for an “if” statement in Bash
... comment was made before you edited your comment, when your comment merely read "the code ... would have failed". A simple solution is to use ${STATUS:-0". Will edit.
– William Pursell
Nov 16 '12 at 0:33
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jQuery UI accordion that keeps multiple sections open?
... a
few lines of jQuery instead, something
like this:
jQuery(document).ready(function(){
$('.accordion .head').click(function() {
$(this).next().toggle();
return false;
}).next().hide();
});
Or animated:
jQuery(document).ready(function(){
$('.accordion .head').click(func...
What is the relationship between the docker host OS and the container base image OS?
...'m not certain that I'm asking the right question... but while I have been reading everything docker that I can get my hands on I see that I can install Docker on Ubuntu 12.04 (for example) and then I can install a Fedora container or a different version of ubuntu? (there is an example where the use...
@Basic(optional = false) vs @Column(nullable = false) in JPA
...). (e.g. entityManager.persist calls).
So I went to the specification and read up about it.
Here is what the spec has to say:
http://download.oracle.com/otndocs/jcp/persistence-2.0-fr-oth-JSpec/
Basic(optional): Whether the value of the field or property may be
null. This is a hint and is dis...
querySelector, wildcard element match?
...nd to use tag_name over tagName, so you do not run into interferences when reading 'computer generated', implicit DOM attributes.
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ERROR: permission denied for sequence cities_id_seq using Postgres
...d by the developers. It's like people want to roam around the Internet and read bottomless StackOverflow threads in attempt to fix things that should have been working right out of the box.
– milosmns
Apr 6 '18 at 15:19
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What is the difference between Θ(n) and O(n)?
...ual to the
growth rate of g(x)
For a more detailed discussion, you can read the definition on Wikipedia or consult a classic textbook like Introduction to Algorithms by Cormen et al.
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