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How to sum a variable by group
...dplyr will be quite a lot faster than base functions, however (can well be 100-1000 times faster for some operations). Also see here
– talat
Jan 23 '15 at 14:50
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CSS attribute selector does not work a href
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+100
Use the $ after your href. This will make the attribute value to match the end of the string.
a[href$='.pdf'] { /*css*/ }
JSFiddl...
CSS image resize percentage of itself?
... is an HTML only solution for modern browsers :
<img srcset="image.jpg 100w" sizes="50px" src="image.jpg"/>
This is telling the browser that the image is twice the dimension of it intended display size. The value are proportional and do not need to reflect the actual size of the image. One ...
What is the difference between lower bound and tight bound?
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Charlie MartinCharlie Martin
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Which is faster: multiple single INSERTs or one multiple-row INSERT?
...n insert at a time using single insert statement. is it allow me to insert 10000 rows at a time?
– Naresh Ramoliya
Apr 30 '16 at 8:02
10
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Gzip versus minify
... we're talking about gzip vs. minify on a small piece of text no more than 100bytes long, an "objective" comparison is unreliable, even pointless - unless we come out with a baseline text for establishing a standard means of benchmarking, like a Lorem Ipsum-type but written in Javascript or CSS.
So...
WPF text Wrap vs WrapWithOverflow
...he comments, here's some examples of how Wrap treats spaces. When Width is 100, Wrap and WrapWithOverflow are identical. Wrap treats the space between wider and example as a line-break opportunity, so example is put on a new line to preserve the entire, continuous word.
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Fastest way to extract frames using ffmpeg?
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If you know exactly which frames to extract, eg 1, 200, 400, 600, 800, 1000, try using:
select='eq(n\,1)+eq(n\,200)+eq(n\,400)+eq(n\,600)+eq(n\,800)+eq(n\,1000)' \
-vsync vfr -q:v 2
I'm using this with a pipe to Imagemagick's montage to get 10 frames preview from any videos. Obviously ...
Performing a Stress Test on Web Application?
... +1 for grinder. paired with EC2, we've successfully used it to spin up 100k concurrent users.
– nategood
Dec 12 '12 at 15:08
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what is the difference between XSD and WSDL
...ll be synchronize and security in place. If there is no sync then there is 100 % chances more than 1 customer might buy same flight ticket from various sources.
I am hoping experts will contribute to my answer. It is really hard for newbie or novice to understand XML, XSD and then to work on Web S...