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How to detect a Christmas Tree? [closed]
... is just a simple monochrome brightness test; any pixels with values above 220 on a 0-255 scale (where black is 0 and white is 255) are saved to a binary black-and-white image. The second threshold tries to look for red and yellow lights, which are particularly prominent in the trees in the upper l...
Draw a perfect circle from user's touch
...port java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.HeadlessException;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util....
Convert camelCaseText to Sentence Case Text
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20 Answers
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How to use a variable inside a regular expression?
...double curly braces. Let's say you want to match TEXTO followed by exactly 2 digits:
if re.search(rf"\b(?=\w){re.escape(TEXTO)}\d{{2}}\b(?!\w)", subject, re.IGNORECASE):
print("match")
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What is a “surrogate pair” in Java?
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answered May 5 '11 at 19:28
Jeffrey L WhitledgeJeffrey L Whitledge
51.2k99 gold badges6363 silver badges9595 bronze badges
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Convert to binary and keep leading zeros in Python
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225
Use the format() function:
>>> format(14, '#010b')
'0b00001110'
The format() funct...
Circle line-segment collision detection algorithm?
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27 Answers
27
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PHP best way to MD5 multi-dimensional array?
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265
(Copy-n-paste-able function at the bottom)
As mentioned prior, the following will work.
md5(...
Why can a function modify some arguments as perceived by the caller, but not others?
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219
Some answers contain the word "copy" in a context of a function call. I find it confusing.
Py...
Add object to ArrayList at specified index
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211
You can do it like this:
list.add(1, object1)
list.add(2, object3)
list.add(2, object2)
Aft...