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Test if object implements interface
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+1 The second one is better because you will probably end up needing to cast afterward with the first one thus giving you two casts ("is" and then an explicit cast). With the second approach you only cast once.
– Andr...
How to generate and validate a software license key?
...aveat: you can't prevent users from pirating, but only make it easier for honest users to do the right thing.
Assuming you don't want to do a special build for each user, then:
Generate yourself a secret key for the product
Take the user's name
Concatentate the users name and the secret key and h...
What is data oriented design?
I was reading this article , and this guy goes on talking about how everyone can greatly benefit from mixing in data oriented design with OOP. He doesn't show any code samples, however.
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What is the most compatible way to install python modules on a Mac?
...xtra Python library in your home dir. Yes, Python will work with more than one library location: one controlled by MacPorts and a user local one for everything missing within MacPorts.
Now notice that I favor pip over easy_install. There is a good reason you should avoid setuptools and easy_install...
Why is volatile not considered useful in multithreaded C or C++ programming?
...ew properties we need, but not all of them, so we can't rely on volatile alone.
However, the primitives we'd have to use for the remaining properties also provide the ones that volatile does, so it is effectively unnecessary.
For thread-safe accesses to shared data, we need a guarantee that:
the...
How can I check if a directory exists in a Bash shell script?
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One thing to keep in mind: [ ! -d "$DIRECTORY" ] will be true either if $DIRECTORY doesn't exist, or if does exist but isn't a directory. Consider something like if [ ! -d "$DIRECTORY" ] ; then mkdir "$DIRECTORY" ; fi; this ...
Best practices to test protected methods with PHPUnit
... So here, you would have to test the protected method (But never a private one). The solution to this, is to create a subclass for testing purpose, and use this to expose the methods. Eg.:
class Foo {
protected function stuff() {
// secret stuff, you want to test
}
}
class SubFoo extends F...
How to check if a Constraint exists in Sql server?
...nding other "constraints" here are some other queries for that:
--Returns one row for each CHECK, UNIQUE, PRIMARY KEY, and/or FOREIGN KEY
SELECT *
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE CONSTRAINT_NAME='XYZ'
--Returns one row for each FOREIGN KEY constrain
SELECT *
FROM I...
Is the order of elements in a JSON list preserved?
... the browser will not change the order.
The following script will output "One", "Two", "Three":
var foo={"3":"Three", "1":"One", "2":"Two"};
for(bar in foo) {
alert(foo[bar]);
}
Whereas the following script will output "Three", "One", "Two":
var foo={"@3":"Three", "@1":"One", "@2":"Two"};
f...
What is the proper way to re-attach detached objects in Hibernate?
...d, and it did reattach the entity,
calling 'lock' with argument 'LockMode.NONE'
implying that you are locking, but not locking,
is the most counterintuitive piece of API design I've ever seen.
So you are stuck.
There's an detach() method, but no attach() or reattach().
An obvious step in the obje...