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What is “entropy and information gain”?
...=0: male
length>=7
| length=5: male
basically each node represent a test performed on a single attribute, and we go left or right depending on the result of the test. We keep traversing the tree until we reach a leaf node which contains the class prediction (m or f)
So if we run the name Amr...
What's the difference between the various methods to get a Context?
...hoose among your choices.
So here is my conclusion: I suppose (I have not tested it further) than the baseContext is required when dealing with contextMenu in your Activity...
The test has been done coding with API 8, and tested on an HTC Desire, android 2.3.3.
I hope my comment have not bored yo...
Get Image size WITHOUT loading image into memory
... the output of the python magic module:
>>> t = magic.from_file('teste.png')
>>> t
'PNG image data, 782 x 602, 8-bit/color RGBA, non-interlaced'
>>> re.search('(\d+) x (\d+)', t).groups()
('782', '602')
This is a wrapper around libmagic which read as few bytes as possib...
Convert between UIImage and Base64 string
... 0))
let image = UIImage(data: imageData!)
return image!
}
Note: Tested in xcode 10.2
Swift 4
Encoding
func convertImageToBase64String (img: UIImage) -> String {
let imageData:NSData = UIImageJPEGRepresentation(img, 0.50)! as NSData //UIImagePNGRepresentation(img)
let imgString...
How do I move a file with Ruby?
...this works across drives, local and remote, eg <code>File.rename 'c:/test/test.txt', 'e:/test.txt'</code>, what OS do you use ?
– peter
Jan 25 '13 at 10:23
...
CHECK constraint in MySQL is not working
...ple for BEFORE INSERT working after MySQL 5.5
DELIMITER $$
CREATE TRIGGER `test_before_insert` BEFORE INSERT ON `Test`
FOR EACH ROW
BEGIN
IF CHAR_LENGTH( NEW.ID ) < 4 THEN
SIGNAL SQLSTATE '12345'
SET MESSAGE_TEXT := 'check constraint on Test.ID failed';
END IF;
END$$ ...
What is aria-label and how should I use it?
... ARIA can lead to significantly worse accessibility if not implemented and tested properly. Don't use ARIA just to have some "cool things in the code" which you don't fully understand. Sadly too often ARIA implementations introduce more issues than solutions in terms of accessibility. This is rather...
C++ Build Systems - What to use? [closed]
...d "start-up" servers as a part of this process. Similarly, the regression-tests were executed as a part of this process, with heavy "reporting" and "difference-testing" between versions -- all as a part of our "build-scripts".
...
Linux, Why can't I write even though I have group permissions?
...am user el
el
touch /foobar/test_file //make a new file
sudo chown root:www-data /foobar/test_file //User=root group=www-data
sudo chmod 474 /foobar/test_file //owner and others get only read,
...
Is String.Contains() faster than String.IndexOf()?
...me his initial complaint with concatenation is memory usage, then he only tests for time spent with the various ways to combine strings.
– sab669
Oct 15 '13 at 20:53
add a co...