Archive
Lion annoyance #1 – Ability to label desktop
This is by far the biggest disappointment I have towards Lion – I simply can’t find a single solution to bring back the desktop labels. I can work around by assigning different wallpapers to different desktops but it’s still not as convenient as having the desktop numbers shown on the task bar.
Something to watch out while using ‘%’ in crontab
% is a special character in crontab and it has to be escaped with another ‘%’ a ‘\’. I just found out through a fail-to-run crontab task:
Non-working version:
1 5 * * * /bin/bash /path/to/myscript.sh `date +%Y%m%d -d '5 days ago'`
When a crontab fails it will drop an email to user’s mailbox. So here are the relavant lines I found in the mailbox (via command mail):
/bin/sh: -c: line 0: unexpected EOF while looking for matching ``'
/bin/sh: -c: line 1: syntax error: unexpected end of file
With those error messages I googled a bit and changed the crontab to the following
working version:
1 5 * * * /bin/bash /path/to/myscript.sh `date +%%Y%%m%%d -d ’5 days ago’`
1 5 * * * /bin/bash /path/to/myscript.sh `date +\%Y\%m\%d -d '5 days ago'`
Attach targeted window using tmux
In tmux sometimes we might need to attach a session with the specific window selected so that we can start working without additional switching window steps. I just found one of the ways to accomplish this is:
tmux select-window -t sess:win && tmux attach -t sess
Credit goes to http://tofu.org/drupal/node/183 [ lines 78 & 79 ]
Fixing Tunnelblick (3.1.7) kernel panic problem in Lion
The currently stable version (3.1.7) of Tunnelblick would cause a kernel panic in Mac Lion while a connection is being made. Workaround is to use a beta version (3.2beta28) which is available at http://code.google.com/p/tunnelblick/downloads/detail?name=Tunnelblick_3.2beta28.dmg, released 7/31/2011.
[Edit 8/18/2011] Just updated Lion to 10.7.1 last night and version 3.2beta28 seems to be unstable as well. It has caused kernel panic two times in a row. Need to keep looking for a version that works. Did a re-installation of the same version and it works afterwards.
Passing array of checkbox values to php through jQuery (example)
input.html
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
function doit() {
var p=[];
$('input.cb').each( function() {
if($(this).attr('checked')) {
p.push($(this).attr('rel'));
}
} );
$.ajax( {
url:'/process.php',
type:'POST',
data: {list:p},
success: function(res) {
alert(res);
}
});
}
</script>
</head>
<body>
<input type="checkbox" class="cb" rel="1"></input>This is 1<br />
<input type="checkbox" class="cb" rel="abc"></input>This is abc<br />
<input type="checkbox" class="cb" rel="999"></input>This is 999<br />
<a href="javascript:void(0)" onclick="doit()">Click</a>
</body>
</html>
process.php
<?php
print_r(@$_POST['list']);
Test-run screenshot:
Live demo (Using google app engine therefore output is slightly different to the screenshot above. The relevant code that deals with the post request is as follow:
class Chkbox(webapp.RequestHandler):
def get(self):
...
def post(self):
d=self.request.get_all( 'list[]' )
self.response.out.write(d)
)
