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How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
...cape_sequence_decode($str) {
// [U+D800 - U+DBFF][U+DC00 - U+DFFF]|[U+0000 - U+FFFF]
$regex = '/\\\u([dD][89abAB][\da-fA-F]{2})\\\u([dD][c-fC-F][\da-fA-F]{2})
|\\\u([\da-fA-F]{4})/sx';
return preg_replace_callback($regex, function($matches) {
if (isset($matches[3...
Best way to parseDouble with comma as decimal separator?
... where a comma denotes a decimal place? You could pass in, for example "1,000,000" which wouldn't parse into German Locale and would then be replaced by "1.000.000" which is not a valid Double.
– Eddie Curtis
Jan 27 '15 at 17:01
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OPTION (RECOMPILE) is Always Faster; Why?
...ere are 10 records in your database and then execute it when there are 100,000,000 records the cached execution plan may no longer be the most effective.
In summary - I don't see any reason that OPTION(RECOMPILE) would be a benefit here. I suspect you just need to update your statistics and your e...
Calculate the median of a billion numbers
...
sort -g numbers | head -n 500000001 | tail -n 2 | dc -e "1 k ? ? + 2 / p"
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How to evaluate http response codes from bash/shell script?
...esponse is a good answer, it overlooks failure scenarios. curl will return 000 if there is an error in the request or there is a connection failure.
url='http://localhost:8080/'
status=$(curl --head --location --connect-timeout 5 --write-out %{http_code} --silent --output /dev/null ${url})
[[ $stat...
Table fixed header and scrollable body
...d them) */
.tableFixHead,
.tableFixHead td {
box-shadow: inset 1px -1px #000;
}
.tableFixHead th {
box-shadow: inset 1px 1px #000, 0 1px #000;
}
.tableFixHead { overflow-y: auto; height: 100px; }
.tableFixHead thead th { position: sticky; top: 0; }
/* Just common table stuff. ...
Get time in milliseconds using C#
...ds. By time, I mean a number that is never equal to itself, and is always 1000 numbers bigger than it was a second ago. I've tried converting DateTime.Now to a TimeSpan and getting the TotalMilliseconds from that... but I've heard it isn't perfectly accurate.
...
Managing CSS Explosion
...in: 0;
font-size: 11px;
}
...
#some .selector {
border: 1px solid #000;
margin: 0;
}
Avoid using TAGs as selectors, when you can use id/classes
First off the DIV and SPAN tags are the exception: you should never use them, ever! ;) Only use them to attach a class/id.
This...
div#answ...
一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...
2) 头信息
Data Header: 0x0706 000. .... = RFU: 0
...0 .... = More Data: False
.... 0... = Sequence Number: 0
.... .1.. = Next Expected Sequence Number: 1
.... ..10 = LLID: Start of an L2CAP messa...
How many files can I put in a directory?
... number of files per directory: ~1.3 × 1020 (performance issues past 10,000)
Maximum file size
16 GiB (block size of 1 KiB)
256 GiB (block size of 2 KiB)
2 TiB (block size of 4 KiB)
2 TiB (block size of 8 KiB)
Maximum volume size
4 TiB (block size of 1 KiB)
8 TiB (block size of 2...