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What is the difference between a heuristic and an algorithm?
...an beings and machines.
While an algorithm is a method containing finite set of instructions used to solving a problem. The method has been proven mathematically or scientifically to work for the problem. There are formal methods and proofs.
Heuristic algorithm is an algorithm that is able to...
Detecting when the 'back' button is pressed on a navbar
...d = false
// Replace the default back button
self.navigationItem.setHidesBackButton(true, animated: false)
self.backButton = UIBarButtonItem(title: "Back", style: UIBarButtonItemStyle.Plain, target: self, action: "goBack")
self.navigationItem.leftBarButtonItem = backButton
}
// Th...
std::unique_ptr with an incomplete type won't compile
...
It seems if the default value for unique_ptr are set to {nullptr} in the header file of the class with c++11 style, a complete declaration is also needed for the above reason.
– feirainy
Apr 11 '19 at 5:16
...
What is the list of supported languages/locales on Android?
... may not necessarily be available for selection in a given device's system settings, though). When using ISO 639-1 codes, the resource folder has the format values-xx... where xx is the ISO-639-1 code.
When using BCP 47 tags, the resource folder is named values-b+xxx... where xxx is the three-le...
Entity Framework is Too Slow. What are my options? [closed]
...ds (which shouldn't differ between debug and release mode) using the ObjectSet<T>.ToTraceString() method. If you encounter a query that requires further optimization you can use some projections to give EF more information about what you trying to accomplish.
Example:
Product product = db.Pr...
HTML minification? [closed]
... Compiler, your own compressor) where it would be safe. The default option set is quite conservative, so you can start with that and experiment with enabling more aggressive options.
The project is extremely well documented and supported.
...
Best practice for storing and protecting private API keys in applications [closed]
... more time, for figuring out which string serves which purpose.
Note that setting up ProGuard shouldn't be as difficult as you fear. To begin with, you only need to enable ProGuard, as documented in project.properties. If there are any problems with third-party libraries, you may need to suppress s...
Encrypt & Decrypt using PyCrypto AES 256
...fter spending some time with the unicode issue)
BS = 16
key = hashlib.md5(settings.SECRET_KEY).hexdigest()[:BS]
pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
unpad = lambda s : s[:-ord(s[len(s)-1:])]
class AESCipher:
def __init__(self, key):
self.key = key
def enc...
What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?
...le device-specific colour spaces, such as the CMYK defined by a particular set of printing press inks.
PNG
The PNG (Portable Network Graphics) file format was created as the free, open-source successor to the GIF. The PNG file format supports truecolor (16 million colours) while the GIF supports on...
What is the difference between HTML tags and ?
...e their color in my stylesheet.
Also note that HTML5 includes a broad new set of elements that define common page structures, such as article, section, nav, etc.
Section 4.4 of the HTML 5 working draft lists them and gives hints as to their usage. HTML5 is still a working spec, so nothing is "f...