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How to redirect to a 404 in Rails?
...oach also lets you use the ActiveRecord bang finders (find!, find_by_...!, etc.), which all raise an ActiveRecord::RecordNotFound exception if no record is found (triggering the rescue_from handler).
– gjvis
Jun 18 '12 at 17:59
...
How do I safely pass objects, especially STL objects, to and from a DLL?
...ce, a standard for calling conventions, data packing/alignment, type size, etc.), you will have to jump through a lot of hoops to try and enforce a standard way of dealing with class objects in your program. There's not even a guarantee it'll work after you jump through all those hoops, nor is there...
Why use apparently meaningless do-while and if-else statements in macros?
...ive in the real world. Unless we can guarantee that all the if statements, etc, in our code use braces, then wrapping macros like this is a simple way of avoiding problems.
– Steve Melnikoff
Nov 20 '13 at 17:16
...
std::enable_if to conditionally compile a member function
...
public:
typedef Goo<T, boost::test<T> > inherited:
// etc. etc.
};
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PHP mkdir: Permission denied problem
...er window and from the menu bar, choose Go > Go To Folder > /private/etc/apache2
now open httpd.conf
find:
User _www
Group _www
change the username:
User <YOUR LOGIN USERNAME>
Now restart apache by running this form terminal:
sudo apachectl -k restart
If it still doesn't work...
Circular list iterator in Python
...n l:
print i
all of which print:
>>>
a
b
c
d
a
b
c
d
...etc.
of the three I'd be prone to the append(pop()) approach as a function
servers = ['a','b','c','d']
def rotate_servers(servers):
servers.append(servers.pop(0))
return servers
while 1:
servers = rotate_serv...
How do I change bash history completion to complete what's already on the line?
...
You may need to enabled bash completion.
Check
/etc/profile
/etc/bash.bashrc
~/.bashrc
to see if any of the above files source /etc/bash_completion. i.e.
. /etc/bash_completion
If /etc/bash___completion is not sourced by any of the above files you will need to add i...
What are the main performance differences between varchar and nvarchar SQL Server data types?
...
What about index size, memory usage etc? I assume you always use int when you could use tinyint too "just in case"?
– gbn
Jul 9 '10 at 7:02
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How to determine SSL cert expiration date from a PEM encoded certificate?
...s in order of their expiration, most recently expiring first.
for pem in /etc/ssl/certs/*.pem; do
printf '%s: %s\n' \
"$(date --date="$(openssl x509 -enddate -noout -in "$pem"|cut -d= -f 2)" --iso-8601)" \
"$pem"
done | sort
Sample output:
2015-12-16: /etc/ssl/certs/Staat_der_Ned...
Why 0 is true but false is 1 in the shell?
...l kinds of information about the failure - why it happened, how to fix it, etc. Having zero mean 'success' and non-zero mean failure lets you can check pretty easily for success, and investigate the particular error for more details if you want to. A lot of APIs and frameworks have a similar conve...