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Looping in a spiral
...zy at first (some loops only get executed once) but step by step I'll make transformations until we arrive at 4 pairs of loops that are identical and hence can be replaced with a single pair placed inside of another loop.
This will provide us with a general solution of computing n iterations without...
Principal component analysis in Python
...his; methods use the current value.
Methods:
The methods of class PCA transform vectors or arrays of e.g.
20 variables, 2 principal components and 1000 observations,
using partial matrices U' d' Vt', parts of the full U d Vt:
A ~ U' . d' . Vt' where e.g.
U' is 1000 x 2
...
Detect encoding and make everything UTF-8
...tion Camerounaise de Football
Fédération Camerounaise de Football
I've transformed the function (forceUTF8) into a family of static functions on a class called Encoding. The new function is Encoding::toUTF8().
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how to use javascript Object.defineProperty
...ere introduced into many languages. You could keep the original code, just transform the discount member into a property with get and set blocks:
function Product(name,price) {
this.name = name;
this.price = price;
//this.discount = 0; // <- remove this line and refactor with the code below
...
C++ Tuple vs Struct
...data(const size_t N) {
std::vector<StructData> data(N);
std::transform(data.begin(), data.end(), data.begin(), [N](auto item) {
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<> dis(0, N);
item.X = dis(gen);
ite...
LINQ Aggregate algorithm explained
...ence. For each value in the sequence:
Apply a user-specified function to transform (currentValue, sequenceValue) into (nextValue)
Set currentValue = nextValue
Return the final currentValue
You may find the Aggregate post in my Edulinq series useful - it includes a more detailed description (inc...
Is it possible to rotate a drawable in the xml description?
...t want to mix the code with things that can be declared in the XML or make transformations with a matrix that will cost processing time.
...
Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition
...would be to extract features (keypoints) using the scale-invariant feature transform (SIFT) or Speeded Up Robust Features (SURF).
You can find a nice OpenCV code example in Java, C++, and Python on this page: Features2D + Homography to find a known object
Both algorithms are invariant to scaling and...
Table fixed header and scrollable body
...find('thead th')
$('.tableFixHead').on('scroll', function() {
$th.css('transform', 'translateY('+ this.scrollTop +'px)');
});
.tableFixHead { overflow-y: auto; height: 100px; }
/* Just common table stuff. */
table { border-collapse: collapse; width: 100%; }
th, td { padding: 8px 16px; }
...
How to resize an image with OpenCV2.0 and Python2.6
... is deprecated in SciPy 1.0.0, and
will be removed in 1.2.0. Use skimage.transform.resize instead.
Note that if you're looking to resize by a factor, you may actually want skimage.transform.rescale.
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