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How can I sanitize user input with PHP?
...ss of escaping data for SQL - to prevent SQL injection - is very different from the process of escaping data for (X)HTML, to prevent XSS.
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HashMap and int as key
...object internally for the key. So you can only use an object that inherits from Object (that is any object).
That is the function put() in HashMap and as you can see it uses Object for K:
public V put(K key, V value) {
if (key == null)
return putForNullKey(value);
int hash = hash(k...
How can I hash a password in Java?
... return hashOfInput.equals(saltAndHash[1]);
}
// using PBKDF2 from Sun, an alternative is https://github.com/wg/scrypt
// cf. http://www.unlimitednovelty.com/2012/03/dont-use-bcrypt.html
private static String hash(String password, byte[] salt) throws Exception {
if (pass...
Allow CORS REST request to a Express/Node.js application on Heroku
...en a REST API on the express framework for node.js that works for requests from the js console in Chrome, and URL bar, etc. I'm now trying to get it working for requests from another app, on a different domain (CORS).
...
Simple insecure two-way data “obfuscation”?
...rypted bytes to the stream,
* then read the encrypted result back from the stream.
*/
#region Write the decrypted value to the encryption stream
CryptoStream cs = new CryptoStream(memoryStream, EncryptorTransform, CryptoStreamMode.Write);
cs.Write(bytes, 0, ...
What is recursion and when should I use it?
...ily be replaced by more efficient iteration. After all, recursion suffers from function call overhead, which in the example above could be substantial compared to the operation inside the function itself.
So the whole reason to do recursion rather than iteration should be to take advantage of the ...
Remove IE10's “clear field” X button on certain inputs?
...ined on the field -- padding-right -- which was intended to keep the text from typing over the 'X' icon that I overlayed on the input field. I'm guessing that IE10 is internally applying the padding-right of the input to the ::--ms-clear pseudo element, and hiding the pseudo element does not restor...
Sorting related items in a Django template
...her solution is to add a property to your Event model, that you can access from your template:
class Event(models.Model):
# ...
@property
def sorted_attendee_set(self):
return self.attendee_set.order_by('last_name')
You could define more of these as you need them...
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Plotting a list of (x, y) coordinates in python matplotlib
...nd(N)
plt.scatter(x, y)
plt.show()
will produce:
To unpack your data from pairs into lists use zip:
x, y = zip(*li)
So, the one-liner:
plt.scatter(*zip(*li))
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Undefined reference to pthread_create in Linux
I picked up the following demo off the web from https://computing.llnl.gov/tutorials/pthreads/
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