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Running a cron job on Linux every six hours
...got a *, and you've too many fields. It's the hour you need to care about
0 */6 * * * /path/to/mycommand
This means every sixth hour starting from 0, i.e. at hour 0, 6, 12 and 18 which you could write as
0 0,6,12,18 * * * /path/to/mycommand
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Using :after to clear floating elements
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edited Jan 28 '16 at 0:34
Chris Martin
27.7k44 gold badges6464 silver badges124124 bronze badges
an...
How do I compare version numbers in Python?
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10 Answers
10
Active
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What is the difference between the mouseover and mouseenter events?
...at makes it very clear and you can actually see for yourself.
var i = 0;
$("div.overout")
.mouseover(function() {
i += 1;
$(this).find("span").text("mouse over x " + i);
})
.mouseout(function() {
$(this).find("span").text("mouse out ");
});
var n = 0;
$("div.ente...
Is short-circuiting logical operators mandated? And evaluation order?
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edited Sep 23 '11 at 15:07
answered Mar 10 '09 at 0:37
Al...
理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...rocess 9682, UID 27, (mysqld) total-vm:47388kB, anon-rss:3744kB, file-rss:80kB
httpd invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
httpd cpuset=/ mems_allowed=0
Pid: 8911, comm: httpd Not tainted 2.6.32-279.1.1.el6.i686 #1
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iterating over each character of a String in ruby 1.8.6 (each_char)
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edited Sep 28 '09 at 1:02
answered Sep 28 '09 at 0:55
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Positioning MKMapView to show multiple annotations at once
I've got several annotations I want to add to my MKMapView (it could 0-n items, where n is generally around 5). I can add the annotations fine, but I want to resize the map to fit all annotations onscreen at once, and I'm not sure how to do this.
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Combine :after with :hover
...elected:after, #alertlist li:hover:after
{
position:absolute;
top: 0;
right:-10px;
bottom:0;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-left: 10px solid #303030;
content: "";
}
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php - get numeric index of associative array
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answered Jul 29 '10 at 18:26
FoscoFosco
35.5k66 gold badges7777 silver badges9898 bronze badges
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