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How does grep run so fast?
...s a note from the author, Mike Haertel:
GNU grep is fast because it AVOIDS LOOKING AT EVERY INPUT BYTE.
GNU grep is fast because it EXECUTES VERY FEW INSTRUCTIONS FOR EACH
BYTE that it
does look at.
GNU grep uses the well-known Boyer-Moore algorithm, which looks first
for the fi...
Difference between no-cache and must-revalidate
...
I believe that must-revalidate means :
Once the cache expires, refuse to return stale responses to the user
even if they say that stale responses are acceptable.
Whereas no-cache implies :
must-revalidate plus the fact the response become...
How does Spring Data JPA differ from Hibernate for large projects?
I am having a hard time deciding if I should stick with Hibernate for a new project, or get my feet wet with JPA and the new Spring Data implementation.
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Count, size, length…too many choices in Ruby?
...; [1,2,3].count{|x| x > 2 }
=> 1
In the case where you don't provide a parameter to count it has basically the same effect as calling length. There can be a performance difference though.
We can see from the source code for Array that they do almost exactly the same thing. Here is the C c...
Locate the nginx.conf file my nginx is actually using
...red Nov 11 '13 at 15:38
Daniel LiDaniel Li
13.7k66 gold badges3939 silver badges5858 bronze badges
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Who is “us” and who is “them” according to Git?
...ture_branch onto the latest master. Therefore, "us" = HEAD, but since git did a new checkout behind-the-scenes to perform this rebase, HEAD is NOT the branch you were on when you typed git rebase master. Instead, us, or HEAD, is some merge-base commit at which point a conflict occurred, and them is ...
CursorLoader usage without ContentProvider
Android SDK documentation says that startManagingCursor() method is depracated:
5 Answers
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System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second
...nge the timer once the work has completed, not before. Example:
private void Callback( Object state )
{
// Long running operation
_timer.Change( TIME_INTERVAL_IN_MILLISECONDS, Timeout.Infinite );
}
Thus there is no need for locking mechanisms because there is no concurrency. The timer will...
How to use ADB to send touch events to device using sendevent command?
I am trying to send touch events to a device using AndroidDebugBridge, so that I can do some basic automation for UI tests. I have followed the discussion in LINK . I am able to use sendevent to simulate touch on emulators, but unable to do the same on a device.
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setTimeout / clearTimeout problems
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You need to declare timer outside the function. Otherwise, you get a brand new variable on each function invocation.
var timer;
function endAndStartTimer() {
window.clearTimeout(timer);
//var millisecBeforeRedirect = 10000;
timer = window.setTimeo...