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Send message to specific client with socket.io and node.js
..."I'm the master", function() {
// Save the socket id to Redis so that all processes can access it.
client.set("mastersocket", socket.id, function(err) {
if (err) throw err;
console.log("Master socket is now" + socket.id);
});
});
socket.on("message to master", function(...
What is the difference between statically typed and dynamically typed languages?
I hear a lot that new programming languages are dynamically typed but what does it actually mean when we say a language is dynamically typed vs. statically typed?
...
Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
Like most web developers, I occasionally like to look at the source of websites to see how their markup is built. Tools like Firebug and Chrome Developer Tools make it easy to inspect the code, but if I want to copy a specific section and play around with it locally, it would be a pain to copy all t...
node.js hash string?
... If I have lots of strings to hash, it is less efficient to keep calling crypto.createHash instead of somehow re-using the result?
– Michael
Mar 28 '19 at 3:23
add a ...
Run cron job only if it isn't already running
...'s just a shell script:
#!/bin/sh
if ps -ef | grep -v grep | grep doctype.php ; then
exit 0
else
/home/user/bin/doctype.php >> /home/user/bin/spooler.log &
#mailing program
/home/user/bin/simplemail.php "Print spooler was not running... Restarted."
...
What is the fastest way to compute sin and cos together?
.... If you need strong optimization, perhaps you should use it.
Here is a small example: http://home.broadpark.no/~alein/fsincos.html
Here is another example (for MSVC): http://www.codeguru.com/forum/showthread.php?t=328669
Here is yet another example (with gcc): http://www.allegro.cc/forums/thread...
Nginx 403 forbidden for all files
I have nginx installed with PHP-FPM on a CentOS 5 box, but am struggling to get it to serve any of my files - whether PHP or not.
...
What is a postback?
...
When does it happen?
A postback originates from the client browser. Usually one of the controls on the page will be manipulated by the user (a button clicked or dropdown changed, etc), and this control will initiate a postback. The state of this control, plus all other controls on the page,(know...
How do I force a favicon refresh?
I have a Grails application running locally using its own tomcat and I have just changed the favicon for a new one. Problem is that I can not see it in any browser. The old favicon shows up or I get no favicon at all, but not my new one. I do not think this is a Grails issue per se, more an issue...
通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...资源的条件下保证程序的运作，ulimit 是我们在处理这些问题时，经常使用的一种简单手段。ulimit 是一种 linux 系统的内键功能，它具有一套参数集，用于为由它生成的 shell 进程及其子进程的资源使用设置限制。本文将在后面的...