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Rails :dependent => :destroy VS :dependent => :delete_all
...te_all is made directly in your application and deletes by SQL :
DELETE * FROM users where compagny_id = XXXX
With the :destroy, there is an instantiation of all of your children. So, if you can't destroy it or if each has their own :dependent, its callbacks can be called.
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The calling thread must be STA, because many UI components require this
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Try to invoke your code from the dispatcher:
Application.Current.Dispatcher.Invoke((Action)delegate{
// your code
});
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Inspecting standard container (std::map) contents with gdb
... Thanks for the link; the only thing is that macros are dependent from the stl libraries version, which I'd prefer to avoid. +1
– Paolo Tedesco
Jan 9 '09 at 10:41
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How to make an input type=button act like a hyperlink and redirect using a get request? [duplicate]
...It's simple and no javascript required!
NOTE:
This approach is not valid from HTML structure. But, it works on many modern browser. See following reference :
For <button>; and
For <input type="button />
shar...
fatal: 'origin' does not appear to be a git repository
I've a repository moodle on my Github account which I forked from the official repository.
6 Answers
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Why doesn't print work in a lambda?
...-ported print function if you are using the latest Python 2.x:
In [1324]: from __future__ import print_function
In [1325]: f = lambda x: print(x)
In [1326]: f("HI")
HI
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Difference between solr and lucene
... plain Lucene as it's easy to use. However, they never restrain themselves from customizing Solr to the maximum extent.
BTW, I see that there are more resources on Solr (4.x) than Lucene (4.x).
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How to move all files including hidden files into parent directory via *
... UNIX & Linux's answer to How do you move all files (including hidden) from one directory to another?. It shows solutions in Bash, zsh, ksh93, standard (POSIX) sh, etc.
You can use these two commands together:
mv /path/subfolder/* /path/ # your current approach
mv /path/subfolder/.* /path/...
GitHub README.md center image
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This is from Github's support:
Hey Waldyr,
Markdown doesn't allow you to tweak alignment directly (see docs here: http://daringfireball.net/projects/markdown/syntax#img), but you can just use a raw HTML 'img' tag and do the alignmen...
Go to particular revision
...on, if your history is linear, is to figure out how many commits there are from the first commit till master and use git checkout master~543 (if there are 543 commits), then git checkout master~542, etc.
– Marcelo Cantos
Sep 25 '11 at 9:27
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