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In Clojure, when should I use a vector over a list, and the other way around?
...ort seq without having to allocate new objects)
Prepending - adding to the start of a list with cons or preferably conj is O(1)
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NGINX to reverse proxy websockets AND enable SSL (wss://)?
...re modification to detect the incoming protocol. Since websockets actually start as an HTTP handshake (a higher software level than TCP) you have to tweak your app to handle both TCP and HTTP traffic. I can't recommend a way to do this just yet.
– crockpotveggies
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sqlalchemy IS NOT NULL select
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Starting in version 0.7.9 you can use the filter operator .isnot instead of comparing constraints, like this:
query.filter(User.name.isnot(None))
This method is only necessary if pep8 is a concern.
source: sqlalchemy docum...
How do I determine whether an array contains a particular value in Java?
... concise. Beautiful.*
Original answer details
Just to clear the code up to start with. We have (corrected):
public static final String[] VALUES = new String[] {"AB","BC","CD","AE"};
This is a mutable static which FindBugs will tell you is very naughty. Do not modify statics and do not allow other c...
Facebook Android Generate Key Hash
...r, you will get a file with the name of debug.txt
9) Now either you can restart command prompt or work with existing command prompt
10) get back to C drive and give the path of openssl Bin folder
11) copy the following code and paste
openssl sha1 -binary debug.txt > debug_sha.txt
12) yo...
What uses are there for “placement new”?
... want to perform any dynamic allocation (or deallocation) after the system starts up, because there's no guarantee how long that is going to take.
What I can do is preallocate a large chunk of memory (large enough to hold any amount of whatever that the class may require). Then, once I figure out ...
How to get the Android device's primary e-mail address
...ring[]{GoogleAuthUtil.GOOGLE_ACCOUNT_TYPE}, true, null, null, null, null);
startActivityForResult(googlePicker, REQUEST_CODE);
And then wait for the result:
protected void onActivityResult(final int requestCode, final int resultCode,
final Intent data) {
if (re...
Why are you not able to declare a class as static in Java?
...rue, but the question you're thinking about usually solves itself when you start to ask yourself what a "static class" would be. In java, a static element means that you can access/invoke it without an instance of the enclosing class; what that could possibly mean if you apply the keyword to the cla...
Implementing Comments and Likes in database
...lf. At least for now... and, I thought that maybe it is a good occasion to start liking a databases a little bit ;) Thank you about your suggestion with stored procedure. Do someone know, if they are mapped by Django ORM automatically ?
– Kokos
Nov 13 '11 at 16...
Best way to store password in database [closed]
...our database, then couldn't I just take a cracker like John the Ripper and start making hashes until I find matches to your stored, hashed passwords?
(since users pick short, dictionary words anyway ... it should be easy)
Answer: Yes ... yes they can.
So, you should 'salt' your passwords.
See the Wi...