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How do cache lines work?
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Another problem the cache line solves (beside reading ahead and saving / freeing six bits on the address bus) is in the way the cache is organized. For example if a cache would be divided in 8 byte (64bit) blocks (cells) one needs to store the address of the memory cell this cache cell holds the...
Separate REST JSON API server and client? [closed]
...ad of me, he could fake out the API very easily and build the UI.
API for free. Having open access to the data in your app is quickly becoming a standard feature. If you start with an API from the ground up, you get this for free.
Clean separation. It is better to think of your app as an API with c...
Tomcat: How to find out running tomcat version
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if you can upload a JSP file you may print out some info like in this example: bestdesigns.co.in/blog/check-jsp-tomcat-version
Save this code into a file called tomcat_version.jsp:
Tomcat Version : <%= application.getServerInfo() %><br>
Servlet Specif...
Why doesn't C++ have a garbage collector?
...weep is faster (less impact on overall performance) but it suffers from a "freeze the world" syndrome: i.e. when the GC kicks in, everything else is stopped until the GC has made its cleanup. If you wish to build a server that answers in a few milliseconds... some transactions will not live up to yo...
Adding an identity to an existing column
...uirements above.
UPDATE - Eric Wu had a comment below that adds important info about this solution. Copying it here to make sure it gets more attention:
There's another caveat here that is worth mentioning. Although the
new table will happily receive data from the old table, and all the
ne...
Get the client's IP address in socket.io
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Where did you get the info? I thought I had read all the docs for socket.io and did not see this. It worked perfectly to solve my problems similar to the OP.
– MikeB
Jun 13 '14 at 18:42
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INNER JOIN vs LEFT JOIN performance in SQL Server
...not been discussed yet.
When using an outer join, the optimizer is always free to drop the outer joined table from the execution plan if the join columns are the PK of the outer table, and none of the outer table columns are referenced outside of the outer join itself. For example SELECT A.* FROM A...
How to terminate a window in tmux?
... If done remotely where tmux is running in some other terminal, one can do INFO=$(tmux new-window -P notepad) followed by tmux kill-window -t $INFO.
– Johann
May 16 '18 at 21:13
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Can't update Macports (with Mac OS X Mavericks)
...experience upgrading... not really a new answer, but hopefully some useful info.
I downloaded and installed the Mavericks MacPorts installer as described above, (but without removing /opt, as suggested by @King Julian did self update which was fine, and then upgrade outdated and it seems to be unin...
How to handle initializing and rendering subviews in Backbone.js?
...t;
<div id="name">Person: Kevin Peel</div>
<div id="info">
First name: <span class="first_name">Kevin</span><br />
Last name: <span class="last_name">Peel</span><br />
</div>
<div>Phone Numbers:</div...