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What's the best manner of implementing a social activity stream? [closed]
...ivity
type is the type of the activity (i.e. Wrote blog post, added photo, commented on user's photo)
data is a serialized object with meta-data for the activity where you can put in whatever you want
This limits the searches/lookups, you can do in the feeds, to users, time and activity types, but...
Why does printf not flush after the call unless a newline is in the format string?
...// Will now print everything in the stdout buffer
Edit: From Andy Ross's comment below, you can also disable buffering on stdout by using setbuf:
setbuf(stdout, NULL);
or its secure version setvbuf as explained here
setvbuf(stdout, NULL, _IONBF, 0);
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How do I get the current absolute URL in Ruby on Rails?
...Rails 2:
You can write request.url instead of request.request_uri. This combines the protocol (usually http://) with the host, and request_uri to give you the full address.
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Why historically do people use 255 not 256 for database field magnitudes?
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Git authentication fails after enabling 2FA
...ng to your settings page.
Use this access token as your password in the command line.
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Detect if Android device has Internet connection
... HttpURLConnection urlc = (HttpURLConnection) (new URL("http://www.google.com").openConnection());
urlc.setRequestProperty("User-Agent", "Test");
urlc.setRequestProperty("Connection", "close");
urlc.setConnectTimeout(1500);
urlc.connect();
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Test if remote TCP port is open from a shell script
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As pointed by B. Rhodes, nc (netcat) will do the job. A more compact way to use it:
nc -z <host> <port>
That way nc will only check if the port is open, exiting with 0 on success, 1 on failure.
For a quick interactive check (with a 5 seconds timeout):
nc -z -v -w5 <host...
How to check programmatically if an application is installed or not in Android?
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Try with this:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Add respective layout
setContentView(R.layout.main_activity);
//...
How do I get the SharedPreferences from a PreferenceActivity in Android?
...ation. I am inflating the settings via a xml file so that my onCreate (and complete class methods) looks like this:
7 Answ...
Diff output from two programs without temporary files
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Use <(command) to pass one command's output to another program as if it were a file name. Bash pipes the program's output to a pipe and passes a file name like /dev/fd/63 to the outer command.
diff <(./a) <(./b)
Similarly ...