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Change text color based on brightness of the covered background area?
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Here's the W3C algorithm (with JSFiddle demo too):
const rgb = [255, 0, 0];
// Randomly change to showcase updates
setInterval(setContrast, 1000);
function setContrast() {
// Randomly update colours
rgb[0] = Math.round(Math.random() * 255);
rgb[1] = Math.round(Math.random(...
Python: Check if one dictionary is a subset of another larger dictionary
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112
Convert to item pairs and check for containment.
all(item in superset.items() for item in subse...
Upgrading PHP in XAMPP for Windows?
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128
Take a backup of your htdocs and data folder (subfolder of MySQL folder), reinstall upgraded ve...
Android Center text on canvas
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Try the following:
int xPos = (canvas.getWidth() / 2);
int yPos = (int) ((canvas.getHeight() / 2) - ((textPaint.descent() + textPaint.ascent()) / 2)) ;
//((textPaint.descent() + textPaint.ascent()) / 2) is the distance from the baseline to the center.
canvas.drawText("He...
What is the difference between atan and atan2 in C++?
What is the difference between atan and atan2 in C++?
11 Answers
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How to count the number of set bits in a 32-bit integer?
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Reshaping data.frame from wide to long format
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edited Oct 21 '19 at 10:33
Jaap
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How to deal with floating point number precision in JavaScript?
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42 Answers
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Transposing a NumPy array
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248
It's working exactly as it's supposed to. The transpose of a 1D array is still a 1D array! (I...
Any gotchas using unicode_literals in Python 2.6?
We've already gotten our code base running under Python 2.6. In order to prepare for Python 3.0, we've started adding:
6 A...