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LEFT OUTER joins in Rails 3
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Doesn't select need a param? Shouldn't this be select('posts.*')?
– Kevin Sylvestre
Mar 26 '15 at 20:08
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Difference between initLoader and restartLoader in LoaderManager
... id already exists: initLoader will only replace the callbacks passed as a parameter but won't cancel or stop the loader. For a CursorLoader that means the cursor stays open and active (if that was the case before the initLoader call). `restartLoader, on the other hand, will cancel, stop and destroy...
Best practice for nested fragments in Android 4.0, 4.1 (
...ic interface OnListener
{
public void onDoSomethingToInitChildFrame(/*parameters*/);
public void showResults();
public void hideResults();
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has impleme...
@Scope(“prototype”) bean scope not creating new bean
...'s a very easy (and elegant) way to achieve that.
You can just change the params proxyMode and value of the @Scope annotation.
With this trick you can avoid to write extra code or to inject the ApplicationContext every time that you need a prototype inside a singleton bean.
Example:
@Service
@S...
Use of Java's Collections.singletonList()?
...
From the javadoc
@param the sole object to be stored in the returned list.
@return an immutable list containing only the specified object.
example
import java.util.*;
public class HelloWorld {
public static void main(String args[]...
Find location of a removable SD card
...s a list of all available sd cards paths, or null if not found.
*
* @param includePrimaryExternalStorage set to true if you wish to also include the path of the primary external storage
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static List<String> getSdCardPaths(final Co...
Using scp to copy a file to Amazon EC2 instance?
...onaws.com:~
Few notes for beginning:
Note the spaces between the three parameters given after the -i
scp stands for secure copy protocol. Knowing the words makes it easier to remember the command.
-i dictates that you need to give the .pem file as the next param. If there is no -i, than you do n...
Java - Convert integer to string [duplicate]
... used to convert the integer to string.Correct me if i did wrong.
/**
* @param a
* @return
*/
private String convertToString(int a) {
int c;
char m;
StringBuilder ans = new StringBuilder();
// convert the String to int
while (a > 0) {
c = a % 10;
a = a / 1...
How to run Selenium WebDriver test cases in Chrome?
....selenium.chrome.ChromeDriver;
public class ChromeTest {
/**
* @param args
* @throws InterruptedException
* @throws IOException
*/
public static void main(String[] args) throws InterruptedException, IOException {
// Telling the system where to find the Chrome d...
How to do a logical OR operation in shell scripting
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From Bash Reference Manual → 3.4.2 Special Parameters
#
($#) Expands to the number of positional parameters in decimal.
Therefore, $# will always be either 0 or a bigger integer.
So if you want to do something whenever $# is either 0 or bigger than 1, you jus...