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When are C++ macros beneficial? [closed]
...for debug functions, to automatically pass things like __FILE__, __LINE__, etc:
#ifdef ( DEBUG )
#define M_DebugLog( msg ) std::cout << __FILE__ << ":" << __LINE__ << ": " << msg
#else
#define M_DebugLog( msg )
#endif
...
Solving “The ObjectContext instance has been disposed and can no longer be used for operations that
...inherited from this entity and provide DbContext instance to this proxy in order to allow lazy loading of membership later:
public class MemberLoanProxy : MemberLoan
{
private CosisEntities db;
private int membershipId;
private Membership membership;
public override Membership Memb...
Format LocalDateTime with Timezone in Java8
...a debate initiated by Bank Credit Suisse suggesting the name PlainDateTime etc. Probably better because the prefix "plain" does indicate that there is nothing more than just date-time. If we were still before Java v1.0 then no prefix would have been better, but names like Date etc. are already reser...
What is the difference between screenX/Y, clientX/Y and pageX/Y?
...d click around for myself! Open up your console in developer tools/Firebug etc and paste this:
document.addEventListener('click', function(e) {
console.log(
'page: ' + e.pageX + ',' + e.pageY,
'client: ' + e.clientX + ',' + e.clientY,
'screen: ' + e.screenX + ',' + e.screenY)
...
Adding images or videos to iPhone Simulator
...
The simplest way to get images, videos, etc onto the simulator is to drag and drop them from your computer onto the simulator. This will cause the Simulator to open the Photos app and start populating the library.
If you want a scriptable method, read on.
Note ...
How to find the kth largest element in an unsorted array of length n in O(n)?
...
This is called finding the k-th order statistic. There's a very simple randomized algorithm (called quickselect) taking O(n) average time, O(n^2) worst case time, and a pretty complicated non-randomized algorithm (called introselect) taking O(n) worst case ...
How to find a table having a specific column in postgresql
...('information_schema', 'pg_catalog')
and t.table_type = 'BASE TABLE'
order by t.table_schema;
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What is the best way to stop people hacking the PHP-based highscore table of a Flash game
...core limit and no way to verify the score on the server by replaying moves etc.
18 Answers
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How to get the instance id from within an ec2 instance?
...dvanced use (retrieve instance ID as well as availability zone and region, etc.):
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"
test -n "$EC2_INSTANCE_ID" || die 'cannot obtain instance-id'
EC2_AVAIL_ZONE="`wget -q -O...
Escape a string for a sed replace pattern
.../[\/&]/\\&/g')/g" $3
}
Here's how you use it:
sedeasy "include /etc/nginx/conf.d/*" "include /apps/*/conf/nginx.conf" /etc/nginx/nginx.conf
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