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What does ~~ (“double tilde”) do in Javascript?
... integers. This works whether the operands are (floating-point) numbers or strings, and the result is a number.
In other words, it yields:
function(x) {
if(x < 0) return Math.ceil(x);
else return Math.floor(x);
}
only if x is between -(231) and 231 - 1. Otherwise, overflow will occur and ...
How do I format a number with commas in T-SQL?
...s does include trailing decimals, though, that could be looped off with SUBSTRING.
SELECT CONVERT(varchar, CAST(987654321 AS money), 1)
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Split a List into smaller lists of N size
...
So if I have a List length zillion, and I want to split into smaller lists Length 30, and from every smaller list I only want to Take(1), then I still create lists of 30 items of which I throw away 29 items. This can be done smarter!
– Har...
Which MySQL datatype to use for an IP address? [duplicate]
...r conversion:
'INSERT INTO `table` (`ipv6`) VALUES ("'.mysqli_real_escape_string(inet_pton('2001:4860:a005::68')).'")'
'SELECT `ipv6` FROM `table`'
$ipv6 = inet_pton($row['ipv6']);
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Detecting an “invalid date” Date instance in JavaScript
...
Here's how I would do it:
if (Object.prototype.toString.call(d) === "[object Date]") {
// it is a date
if (isNaN(d.getTime())) { // d.valueOf() could also work
// date is not valid
} else {
// date is valid
}
} else {
// not a date
}
Update [2018-05-31]...
Flatten an irregular list of lists
... if isinstance(el, collections.Iterable) and not isinstance(el, basestring):
for sub in flatten(el):
yield sub
else:
yield el
I used the Iterable ABC added in 2.6.
Python 3
In Python 3, the basestring is no more, but you can use a tuple of s...
List the queries running on SQL Server
...ly running on MS SQL Server (either through the Enterprise Manager or SQL) and/or who's connected?
17 Answers
...
How to add facebook share button on my website?
... See the sharrre.com jquery plugin, it makes it easy to customize the look and bundle several social "like" buttons into one.
– pixeline
Oct 12 '13 at 10:24
3
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Write text files without Byte Order Mark (BOM)?
...h as a byte order mark, at
the beginning of a file, use the WriteAllText(String, String,
Encoding) method overload with UTF8 encoding.
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pdf2htmlEX实现pdf转html - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...成的html文件名称
* @return
*/
public static boolean pdf2html(String command,String pdfName,String htmlName){
Runtime rt = Runtime.getRuntime();
try {
Process p = rt.exec(command);
StreamGobbler errorGobbler = new StreamGobbler(p.getErrorStream(), "ERROR");
...