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How do I check (at runtime) if one class is a subclass of another?
... and 1.0, if it's int then the convention is 0 to 255. I could go through all sorts of contortions to try and get the image to quack, but it's much more straight forward to just ask "are you a duck" and scale my operations accordingly.
– Omegaman
Mar 18 '14 at...
Hibernate Error: org.hibernate.NonUniqueObjectException: a different object with the same identifier
... had this error many times and it can be quite hard to track down...
Basically, what hibernate is saying is that you have two objects which have the same identifier (same primary key) but they are not the same object.
I would suggest you break down your code, i.e. comment out bits until the error ...
How do I control how Emacs makes backup files?
...tory as the file you're editing,
but that is easy to change. You can make all backup files go
into a directory by putting something like the following in your
.emacs.
(setq backup-directory-alist `(("." . "~/.saves")))
There are a number of arcane details associated with how Emacs
might create y...
How do I convert a PDF document to a preview image in PHP? [closed]
...
If i want all page of pdf to convert into image. then how to do?
– Dhara
May 7 '18 at 8:03
add a comment
...
how to check if a form is valid programmatically using jQuery Validation Plugin
...rm_id").valid();
Checks whether the selected form is valid or whether all selected
elements are valid. validate() needs to be called on the form before
checking it using this method.
Where the form with id='form_id' is a form that has already had .validate() called on it.
...
ssh remote host identification has changed
I've reinstalled my server and I am getting these messages:
28 Answers
28
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Why doesn't Java allow overriding of static methods?
...One was a concern with performance: there had been a lot of criticism of Smalltalk about it being too slow (garbage collection and polymorphic calls being part of that) and Java's creators were determined to avoid that. Another was the decision that the target audience for Java was C++ developers. M...
How can I fill out a Python string with spaces?
...idth=16,
)
Which results in (you guessed it):
'Hi '
And for all these, you can use python 3.6 f-strings:
message = 'Hi'
fill = ' '
align = '<'
width = 16
f'{message:{fill}{align}{width}}'
And of course the result:
'Hi '
...
How to determine the memory footprint (size) of a variable?
... This is what I've done on my Ubuntu server to enable it:
sudo apt-get install libjudy-dev libjudydebian1
sudo pecl install memprof
echo "extension=memprof.so" > /etc/php5/mods-available/memprof.ini
sudo php5enmod memprof
service apache2 restart
And then in my code:
<?php
memprof_enable();
//...
Why is Git better than Subversion?
...urceSafe , I just love Subversion. Combined with TortoiseSVN , I can't really imagine how it could be any better.
30 An...