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Read file line by line using ifstream in C++
...your software, you may consider using the C language. This code can be 4-5 times faster than the C++ versions above, see benchmark below
FILE* fp = fopen(FILENAME, "r");
if (fp == NULL)
exit(EXIT_FAILURE);
char* line = NULL;
size_t len = 0;
while ((getline(&line, &len, fp)) != -1) {
...
How can I delay a method call for 1 second?
...
You could also use a block
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 1 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
[object method];
});
Most of time you will want to use dispatch_get_main_queue, although if there is no UI in the method you could use a global q...
How can I view live MySQL queries?
...HOW FULL PROCESSLIST; to see what queries are being processed at any given time, but that probably won't achieve what you're hoping for.
The best method to get a history without having to modify every application using the server is probably through triggers. You could set up triggers so that every...
How to implement the activity stream in a social network
... a batch of activities by activity ID or by using a set of friend IDs with time constraints.
Publish the activity IDs to Redis whenever an activity record is created, adding the ID to an "activity stream" list for every user who is a friend/subscriber that should see the activity.
Query Redis to...
Pipe output and capture exit status in Bash
...olution. It's also something that's worth thinking about in general as any time you're doing a long-running command a name pipe is often the most flexible way. It's worth noting that some systems don't have mkfifo and may instead require mknod -p if I remember right.
– Haravikk...
The definitive guide to form-based website authentication [closed]
...se them only as a last resort when a user has failed to log in a number of times and throttling delays are maxed out. This will happen rarely enough to be acceptable, and it strengthens the system as a whole.
Storing Passwords / Verifying logins
This may finally be common knowledge after all the hig...
“Wrap with try…catch” in IntelliJ?
...r OS X.)
I like to check the Productivity Guide under the Help menu from time to time. Not only does it tell me all the shortcuts, but it keeps track of how many times I've used each one and when I last used it. I can see how well I'm leveraging the shortcuts.
...
How and where are Annotations used in Java?
...way or another to be useful. Annotations can be interpreted at development-time by the IDE or the compiler, or at run-time by a framework.
Annotation processing is a very powerful mechanism and can be used in a lot of different ways:
to describe constraints or usage of an element: e.g. @Deprecat...
How do I “git blame” a deleted line?
...ommand to show a reversed git log. The first commit shown will be the last time that line appears, and the next commit will be when it is changed or removed.
git log --reverse --ancestry-path COMMIT^..master
share
...
SQL Inner-join with 3 tables?
... halls you could do it this way. You just join on your Hall table multiple times for each room pref id:
SELECT s.StudentID
, s.FName
, s.LName
, s.Gender
, s.BirthDate
, s.Email
, r.HallPref1
, h1.hallName as Pref1HallName
, r.HallPref2
, h2.hallName as Pref...