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std::shared_ptr thread safety explained
I'm reading http://gcc.gnu.org/onlinedocs/libstdc++/manual/shared_ptr.html and some thread safety issues are still not clear for me:
...
E11000 duplicate key error index in mongodb mongoose
...xes
From comments:
Your error says that the key is named mydb.users.$email_1 which makes me suspect that you have an index on both users.email and users.local.email (The former being old and unused at the moment). Removing a field from a Mongoose model doesn't affect the database. Check with mydb.u...
Using CookieContainer with WebClient class
... public CookieContainer CookieContainer { get { return _container; } set { _container = value; } }
– Igor Shubin
Nov 20 '14 at 14:10
1
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how to make a whole row in a table clickable as a link?
... a class on each row, and decorate the table with a class name of clickable_row (CamelCase is against HTML standards and should be lower case (I had issues with cross browser a few times with this)) and then the jQuery is $('.clickable_row tr').click(function ... But really you should be using data-...
What is an abstract class in PHP?
...mpose requirements upon the exhibiting class.
Example below :
class Non_Abstract_Class
{
abstract protected function getValue();
public function printOut() {
echo "Hello how are you?";
}
}
$obj=new Non_Abstract_Class();
$obj->printOut();
//Fatal error: Class Non_Abstract_...
C++ error: undefined reference to 'clock_gettime' and 'clock_settime'
...c version 2.17, the library linking -lrt is no longer required.
The clock_* are now part of the main C library. You can see the change history of glibc 2.17 where this change was done explains the reason for this change:
+* The `clock_*' suite of functions (declared in <time.h>) is now avai...
How to check for valid email address? [duplicate]
... to check, it might be faster to compile the regex first:
import re
EMAIL_REGEX = re.compile(r"... regex here ...")
if not EMAIL_REGEX.match(email):
# whatever
Another option is to use the validate_email package, which actually contacts the SMTP server to verify that the address exists. Thi...
Create directories using make file
...
This would do it - assuming a Unix-like environment.
MKDIR_P = mkdir -p
.PHONY: directories
all: directories program
directories: ${OUT_DIR}
${OUT_DIR}:
${MKDIR_P} ${OUT_DIR}
This would have to be run in the top-level directory - or the definition of ${OUT_DIR} would h...
Twitter Bootstrap: div in container with 100% height
....
First of all, the container (parent) needs to be full height:
Option 1_ Add a class for min-height: 100%;. Remember that min-height will only work if the parent has a defined height:
html, body {
height: 100%;
}
.min-100 {
min-height: 100%;
}
https://www.codeply.com/go/dTaVyMah1U
Opt...
Catch Ctrl-C in C
... that is also working under asynchronous interrupts: I would either use sig_atomic_t or atomic_bool types there. I just missed that one. Now, since we are talking: would you like me to rollback my latest edit? No hard feelings there it would be perfectly understandable from your point of view :)
...