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What's a good rate limiting algorithm?
...ks, but if someone triggers less messages than the limit (e.g., rate limit is 5 messages per 8 seconds, and the person triggers only 4), and the next trigger is over the 8 seconds (e.g., 16 seconds later), the bot sends the message, but the queue becomes full and the bot waits 8 seconds, even though...
Using varchar(MAX) vs TEXT on SQL Server
...at the VARCHAR(MAX) datatype (which can store close to 2GB of char data) is the recommended replacement for the TEXT datatype in SQL Server 2005 and Next SQL SERVER versions.
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What is the advantage of using async with MVC5?
What is the difference between:
3 Answers
3
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What is the most appropriate way to store user settings in Android application
...h for saving application and user settings.
The only area of concern here is what you're saving. Passwords are always a tricky thing to store, and I'd be particularly wary of storing them as clear text. The Android architecture is such that your application's SharedPreferences are sandboxed to prev...
How to initialize HashSet values by construction?
...
There is a shorthand that I use that is not very time efficient, but fits on a single line:
Set<String> h = new HashSet<>(Arrays.asList("a", "b"));
Again, this is not time efficient since you are constructing an arra...
Check existence of input argument in a Bash shell script
I need to check the existence of an input argument. I have the following script
11 Answers
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HTTP vs HTTPS performance
...tps? I seem to recall reading that HTTPS can be a fifth as fast as HTTP. Is this valid with the current generation webservers/browsers? If so, are there any whitepapers to support it?
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Java: how do I get a class literal from a generic type?
Typically, I've seen people use the class literal like this:
8 Answers
8
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How to check whether a given string is valid JSON in Java
...ry parsing it and catch the exception:
import org.json.*;
public boolean isJSONValid(String test) {
try {
new JSONObject(test);
} catch (JSONException ex) {
// edited, to include @Arthur's comment
// e.g. in case JSONArray is valid as well...
try {
...
Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
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The problem is still your pg_hba.conf file (/etc/postgresql/9.1/main/pg_hba.conf*).
This line:
local all postgres peer
Should be:
local all postgres ...