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What is stack unwinding?
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Stack unwinding is usually talked about in connection with exception handling. Here's an example:
void func( int x )
{
char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly de...
What is a Y-combinator? [closed]
...m the “functional” side of things. Most programmers don't know much at all about combinators, if they've even heard about them.
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Getting new Twitter API consumer and secret keys
...SS TOKEN.
5 years late to answer :)
Now you have these tokens which is all you need.
'oauth_access_token' => Access token
'oauth_access_token_secret' => Access token secret
'consumer_key' => API key
'consumer_secret' => API secret
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When does invoking a member function on a null instance result in undefined behavior?
...) and (b) result in undefined behavior. It's always undefined behavior to call a member function through a null pointer. If the function is static, it's technically undefined as well, but there's some dispute.
The first thing to understand is why it's undefined behavior to dereference a null poin...
adding header to python requests module
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You can also do this to set a header for all future gets for the Session object, where x-test will be in all s.get() calls:
s = requests.Session()
s.auth = ('user', 'pass')
s.headers.update({'x-test': 'true'})
# both 'x-test' and 'x-test2' are sent
s.get('http://h...
Get users by name property using Firebase
...Previously, Firebase required you to generate your own indexes or download all data at a location to find and retrieve elements that matched some child attribute (for example, all users with name === "Alex").
In October 2014, Firebase rolled out new querying functionality via the orderByChild() met...
How to print to console when using Qt
...is good enough to print to stderr, you can use the following streams originally intended for debugging:
#include<QDebug>
//qInfo is qt5.5+ only.
qInfo() << "C++ Style Info Message";
qInfo( "C Style Info Message" );
qDebug() << "C++ Style Debug Message";
qDebug( "C Style Debug Me...
Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug
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This is going to sound stupid, but I tried all these solutions, running VS2010 on Windows 7. None of them worked except the renaming and building, which was VERY tedious to say the least. Eventually, I tracked down the culprit, and I find it hard to believe. But I was...
Iterating over every two elements in a list
... y in pairwise(l):
print "%d + %d = %d" % (x, y, x + y)
Or, more generally:
from itertools import izip
def grouped(iterable, n):
"s -> (s0,s1,s2,...sn-1), (sn,sn+1,sn+2,...s2n-1), (s2n,s2n+1,s2n+2,...s3n-1), ..."
return izip(*[iter(iterable)]*n)
for x, y in grouped(l, 2):
print...
How to run cron once, daily at 10pm
...'s date, it happened to me to set crontab to start a job at 22, but it actually started at 23 because the system was UTC (so 22 for the system was 23 for me in GMT).
– nnsense
Apr 24 '19 at 18:10
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