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Best way to convert strings to symbols in hash
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In Ruby >= 2.5 (docs) you can use:
my_hash.transform_keys(&:to_sym)
Using older Ruby version? Here is a one-liner that will copy the hash into a new one with the keys symbolized:
my_hash = my_hash.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
With Rails y...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
...work described in the paper "Rectangle Detection based on a Windowed Hough Transform".
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Difference between array_map, array_walk and array_filter
...ept that instead of modifying in-place it will return a new array with the transformed elements.
array array_filter ( array $input [,
callback $callback ] )<-return array
array_filter with function F, instead of transforming the elements, will remove any elements for which F(x) is not t...
CSS: center element within a element
...db;
}
.inner-element{
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%,-50%);
/* or 3d alternative if you will add animations (smoother transitions) */
transform: translate3d(-50%,-50%,0);
/* Other styling stuff */
width: 100px;
height: 100px;
background-co...
simulate background-size:cover on or
... absolute;
left: 50%; /* % of surrounding element */
top: 50%;
transform: translate(-50%, -50%); /* % of current element */
}
Of course, vw, vh, and transform are CSS3, so if you need compatibility with much older browsers, you'll need to use script.
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[SOLVED] Can't send payload > 23bytes(MTU setted to 128bytes) - #9 by ...
...n-state);
stroke: #fff;
stroke-width: 0.5px;
transform-origin: center;
opacity: 0;
r: max(1vw, 11px);
cy: 50%;
filter: saturate(2) opacity(0.85);
}
.dots:first-child {
fill: var(--quaternary);
}
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Can I change the height of an image in CSS :before/:after pseudo-elements?
...ore practical.
.pdflink:after {
content: url('/images/pdf.png');
transform: scale(.5);
}
http://jsfiddle.net/Nwupm/
Drawbacks: you need to know the intrinsic dimensions of the image, and it leaves you with some whitespace, which I can't get rid of ATM.
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How to make an image center (vertically & horizontally) inside a bigger div [duplicate]
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I used this, but removed margin bits and adding -webkit-transform: translateY(-50%); -moz-transform: translateY(-50%); -ms-transform: translateY(-50%); transform: translateY(-50%);. Gives more generic solution that does need element size.
– Jon
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Pan & Zoom Image
...age within a Border with it's ClipToBounds property set to True. The RenderTransformOrigin on the image is then set to 0.5,0.5 so the image will start zooming on the center of the image. The RenderTransform is also set to a TransformGroup containing a ScaleTransform and a TranslateTransform.
I then...
Fast and responsive interactive charts/graphs: SVG, Canvas, other?
...geometric or semantic zooming.
Geometric zooming means you apply a single transform to the entire viewport: when you zoom in, circles become bigger. Semantic zooming in contrast means you apply transforms to each circle individually: when you zoom in, the circles remain the same size but they sprea...