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Is “double hashing” a password less secure than just hashing it once?
...candidates. You can easily increase the time it takes to attack a password from hours to years.
Simple iteration is not enough
Merely chaining hash output to input isn't sufficient for security. The iteration should take place in the context of an algorithm that preserves the entropy of the passwo...
How can I “pretty print” a Duration in Java?
...
It appears from an answer below that an instance of Period can be created directly, without first creating a Duration instance and then converting it to Period. E.g. Period period = new Period(millis); String formatted = formatter.print...
Disable a Button
... I do believe that the IBOutlet is needed if you are to disable the button from within another function.
– user9470831
Mar 10 '19 at 2:05
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How do I install Maven with Yum?
...et statement above.
Afterwards the process is easy
Run the wget command from the dir you want to extract maven too.
run the following to extract the tar,
tar xvf apache-maven-3.0.5-bin.tar.gz
move maven to /usr/local/apache-maven
mv apache-maven-3.0.5 /usr/local/apache-maven
Next add the en...
How do I know that the UICollectionView has been loaded completely?
...a now enqueues the loading of the cells on the main thread (even if called from the main thread). So the cells aren't actually loaded (cellForRowAtIndexPath: isn't called) after reloadData returns. Wrapping code you want executed after your cells are loaded in dispatch_async(dispatch_get_main... and...
How can I put strings in an array, split by new line?
...nction, using "\n" as separator:
$your_array = explode("\n", $your_string_from_db);
For instance, if you have this piece of code:
$str = "My text1\nMy text2\nMy text3";
$arr = explode("\n", $str);
var_dump($arr);
You'd get this output:
array
0 => string 'My text1' (length=8)
1 => st...
Using Git how do I find changes between local and remote
... git fetch (which is more like hg pull than hg fetch) to fetch new commits from your remote servers.
So, if you have a branch called master and a remote called origin, after running git fetch, you should also have a branch called origin/master. You can then get the git log of all commits that maste...
What are forward declarations in C++?
...tise to always forward declare and include headers as needed in .cpp file? From reading your answer it would appear it should be so, but I'm wondering if there's any caveats?
– Zepee
Feb 11 '15 at 19:28
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Why can I access private variables in the copy constructor?
...ide intended behaviours while honouring the post-conditions and invariants from your design.
It's not just the copy constructor either - a great many operations can involve two or more instances of your class: if you're comparing, adding/multiplying/dividing, copy-constructing, cloning, assigning ...
Why is “if not someobj:” better than “if someobj == None:” in Python?
...An empty string is false."
False, 0, (), [], {} and "" are all different from None, so your two code snippets are not equivalent.
Moreover, consider the following:
>>> False == 0
True
>>> False == ()
False
if object: is not an equality check. 0, (), [], None, {}, etc. are all...