substr() is a very simple function for working with strings. It's been around forever, and is well documented. I recently had need to find the last character of a string in javascript. Everything was working fine in Firefox and Chrome, but IE was breaking.
'abcdef'.substr(-1,1)
That is, start at 1 character from the end (-1) and return 1 character. In all other browsers this returns 'f' but in IE it returns 'a'.
Malicious Software Removal Tool scans your system on demand for malware, and Microsoft Security Essentials is a real time anti-virus tool. Both are tools are free.
I use Thunderbird as an IMAP client on my GMail account. There are a couple of idiosyncrasies that require some settings changes. Google has a detailed page about setting up various IMAP Clients to work properly with GMail.
If you have a function that will get called lots of times, and you'd like to cache the results so as not to incur a performance penalty for hitting the disk/DB again use static variables.
function get_user($id) {
// Sanitize the input
$id = intval($id);
// Declaring as static prevents the variable from dying when the function exits
static $cache;
// If the data is already in the cache just return that
if ($cache[$id]) { return $cache[$id]; }
// Get the data from the DB/Disk/Slow Source
$rs = mysql_query("SELECT * FROM UserTable WHERE ID = $id");
$ret = mysql_fetch_assoc($rs);
// Store the results in the cache so it will be there next time
$cache[$id] = $ret;
return $ret;
}
This will store the results in cache (memory), speeding up subsequent requests. This cache will last until your script ends. To store across multiple script executions you'll want to look at something like memcache.
Ever need to find the PID of a specific process, or if a process is running? Pgrep to the rescue!
pgrep pigdin
This allows you to do cool things like:
#!/usr/bin/perl
if (`pgrep speedcrunch`) {
print "is running\n";
} else {
print "It's not running\n";
# do some other stuff
}
I changed the water filter in my fridge. This is strictly a tracking entry for that.
The filter is a Kenmore 469010
AnonymousPro is a great free (as in beer, and speech) monospace font. I've been using it for a couple of months now for all my console/coding needs. It's very readable and functional. I can't recommend it enough!
If you want to extend a javascript object:
// Define the function to do what you want
function first3char() {
return this.substr(0,3); // 'this' will be the variable that's passed in
}
// Extend the javascript string operator
String.prototype.first3=first3char;
// Call your extension using the string 'abc123'
"abc123".first3();
I found this interesting PHP library called Markdown. I'm looking at implementing it on this site.
Here's a link to the syntax documentation.
This is a test of some blockquoted text! - Scott Baker
curl -sS -o /tmp/output.mp3 --max-time 1800 http://stream1.opb.org/radio.mp3
Courtesy of comandlinefu.com
I use FireBug all the time, it's an amazing tool for web developers. Leaving it enabled all the time causes Firefox to slow down considerably:
I need to be clear here: If you have Firebug installed you are probably not getting fast Javascript. Firebug doesn’t have to be active on your current page. If you have the grey icon on your status bar, you have probably disabled the JIT. This is true if you have ever enabled the Console and consequently the Script panels and left them on. This is likely true for most recent versions of Firebug. The quick fix is to disable the Script and Console panels via the mini menu on their respective tabs. - robcee It's pretty easy to disable and speed things up. Now I only enable it for sites I need to debug.
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