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Draw on HTML5 Canvas using a mouse
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I changed canvas.offsetLeft; and canvas.offsetTop; with canvas.getBoundingClientRect().left; and canvas.getBoundingClientRect().top; respectively to fix the scrolling problem.
– KWILLIAMS
Nov 15 '17 at 19:27
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Sass - Converting Hex to RGBa for background opacity
...the hex color into RGB components, though, you can use the red(), green(), and blue() functions to do so:
$red: red($color);
$green: green($color);
$blue: blue($color);
background: rgb($red, $green, $blue); /* same as using "background: $color" */
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Multi-gradient shapes
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I don't think you can do this in XML (at least not in Android), but I've found a good solution posted here that looks like it'd be a great help!
ShapeDrawable.ShaderFactory sf = new ShapeDrawable.ShaderFactory() {
@Override
public Shader resize(int width, int height) {
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Find the most common element in a list
...-- [itertools.groupby][1]. itertools offers fast, reusable functionality, and lets you delegate some tricky logic to well-tested standard library components. Consider for example:
import itertools
import operator
def most_common(L):
# get an iterable of (item, iterable) pairs
SL = sorted((x,...
Fundamental difference between Hashing and Encryption algorithms
I see a lot of confusion between hashes and encryption algorithms and I would like to hear some more expert advice about:
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Generic List - moving an item within the list
So I have a generic list, and an oldIndex and a newIndex value.
10 Answers
10
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How do I calculate a point on a circle’s circumference?
... r * cos(a)
y = cy + r * sin(a)
Where r is the radius, cx,cy the origin, and a the angle.
That's pretty easy to adapt into any language with basic trig functions. Note that most languages will use radians for the angle in trig functions, so rather than cycling through 0..360 degrees, you're cycli...
What function is to replace a substring from a string in C?
Given a ( char * ) string, I want to find all occurrences of a substring and replace them with an alternate string. I do not see any simple function that achieves this in <string.h> .
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What happens if a Android Service is started multiple times?
... in one instance. However, everytime you start the service, the onStartCommand() method is called.
This is documented here
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Copy object values in Visual Studio debug mode
...tudio debug mode it's possible to hover over variables to show their value and then right-click to "Copy", "Copy Expression" or "Copy Value".
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