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How to get arguments with flags in Bash
... show brief help"
echo "-a, --action=ACTION specify an action to use"
echo "-o, --output-dir=DIR specify a directory to store output in"
exit 0
;;
-a)
shift
if test $# -gt 0; then
export PROCESS=$1
else
echo "no ...
Pythonic way to create a long multi-line string
... quotes to start and end them.
s = """ this is a very
long string if I had the
energy to type more and more ..."""
You can use single quotes too (3 of them of course at start and end) and treat the resulting string s just like any other string.
NOTE: Just as with any string, anyt...
When to use f:viewAction / preRenderView versus PostConstruct?
...o use one or the other based on the type of scope of the backing bean e.g. If the backing bean is @RequestScoped , then would the choice of using f:viewAction or preRenderView over @PostConstruct to initialize your backing bean prior to rendering the view be irrelevant as the two would result...
Best way to use PHP to encrypt and decrypt passwords? [duplicate]
...e and passwords, etc... I want to keep information secure, but I know that if I hash their information, I can't retrieve it for later use.
...
When to create a new app (with startapp) in Django?
...
Does that mean, if I make a child model, it must always be in the same app? Since I can't easily drop it into another project without bringing over two "apps"
– Lionel
Feb 10 '11 at 5:22
...
Synthetic Class in Java
...ou have a switch statement, java creates a variable that starts with a $. If you want to see an example of this, peek into the java reflection of a class that has a switch statement in it. You will see these variables when you have at least one switch statement anywhere in the class.
To answer y...
Are there benefits of passing by pointer over passing by reference in C++?
...
A pointer can receive a NULL parameter, a reference parameter can not. If there's ever a chance that you could want to pass "no object", then use a pointer instead of a reference.
Also, passing by pointer allows you to explicitly see at the call site whether the object is passed by value or by ...
When should I use a List vs a LinkedList
... = 0;
foreach (var item in list)
sum += item.A;
Even if you only access data essentially it is much slower!! I say never use a linkedList.
Here is another comparison performing a lot of inserts (we plan on inserting an item at the middle of the list)
Linked List (51 se...
Multi-line tooltips in Java?
...
If you wrap the tooltip in <html> and </html> tags, you can break lines with <br> tags. See http://www.jguru.com/faq/view.jsp?EID=10653 for examples and discussion.
Or you can use the JMultiLineToolTip c...
When creating a service with sc.exe how to pass in context parameters?
... anything containing special characters or spaces.
It is advisable to specify a Display Name for the service as well as setting the start setting to auto so that it starts automatically. You can do this by specifying DisplayName= yourdisplayname and start= auto in your create statement.
Here is an...