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LESS CSS nesting classes
...s1 {
.class2 {}
}
defines nested nodes. .class2 will only be applied if it is a child of a node with the class class1.
I've been confused with this too and my conclusion is that LESS needs a this keyword :).
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How do I manage MongoDB connections in a Node.js web application?
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@Cracker: If you have express application, you can save db object into req.db with this middleware: github.com/floatdrop/express-mongo-db
– floatdrop
Aug 8 '14 at 18:15
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TypeScript type signatures for functions with variable argument counts
...HttpHeaders();
headers.append('Content-Type', 'application/json')
if (additionalHeaders && additionalHeaders.length)
for (var header of additionalHeaders)
headers.append(header.name, header.value);
return headers;
}
Then you can call it:
headers: this.get...
What is the !! (not not) operator in JavaScript?
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Converts Object to boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, true.
!oObject // inverted boolean
!!oObject // non inverted boolean so true boolean representation
So !! is not an operator, it's just the ! ...
How do I get today's date in C# in mm/dd/yyyy format?
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DateTime.Now.ToString("M/d/yyyy");
http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx
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postgresql return 0 if returned value is null
... AND u_kbalikepartnumbers_id = 1000307
AND ( EXTRACT( DAY FROM ( NOW() - dateEnded ) ) ) * 24 < 48
AND COALESCE( price, 0 ) > ( SELECT AVG( COALESCE( price, 0 ) )* 0.50
FROM ( SELECT *, cume_dist() OVER ( ORDER BY price DESC )
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ImageConvertor 扩展：免费图像转换器，支持JPG/PNG/WEBP格式转换和图像处...
...鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + 'px'; element.style.top = (e.clientY - offsetY) + 'px'; }; // 鼠标释放时停止拖动 document.onmouseup = function(...
How can I create an array with key value pairs?
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Use the square bracket syntax:
if (!empty($row["title"])) {
$catList[$row["datasource_id"]] = $row["title"];
}
$row["datasource_id"] is the key for where the value of $row["title"] is stored in.
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Access key value from Web.config in Razor View-MVC3 ASP.NET
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What's the difference between @Anwar's answer and yours? Besides the naming ;)
– Nate-Wilkins
Oct 11 '13 at 16:40
21
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How does '20 seconds' work in Scala?
...ationInt is a value class, so the compiler will avoid wrapping the integer if possible.
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