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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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In Python, what is the difference between “.append()” and “+= []”?
...ase the only difference is performance: append is twice as fast.
Python 3.0 (r30:67507, Dec 3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import timeit
>>> timeit.Timer('s.append("something")', 's...
Javascript Functions and default parameters, not working in IE and Chrome
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jucojuco
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Python int to binary string?
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800
Python's string format method can take a format spec.
>>> "{0:b}".format(37)
'100101...
How to unset max-height?
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Reset it to none:
pre {
max-height: 250px;
}
pre.doNotLimitHeight {
max-height: none;
}
Reference
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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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Using :after to clear floating elements
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edited Jan 28 '16 at 0:34
Chris Martin
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an...
How do I compare version numbers in Python?
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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...
php - get numeric index of associative array
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answered Jul 29 '10 at 18:26
FoscoFosco
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