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OpenShift rhc setup using multiple accounts
...using "server add" command and then you can provide the server nickname in all subsequent commands using --server option.
For example,
rhc server add -l <first_account> --nickname srv1 <first-server>
rhc server add -l <second_account> --nickname srv2 <second-server>
You m...
What's the difference between integer class and numeric class in R
...for double precision floating point numbers) and integer. R will automatically convert between the numeric classes when needed, so for the most part it does not matter to the casual user whether the number 3 is currently stored as an integer or as a double. Most math is done using double precision...
Should I use @EJB or @Inject
...se see comments for details.
I switched from @Inject to @EJB because @EJB allows circular injection whereas @Inject pukes on it.
Details: I needed @PostConstruct to call an @Asynchronous method but it would do so synchronously. The only way to make the asynchronous call was to have the original ca...
Why is JsonRequestBehavior needed?
... involving JSON requests to improve the liklihood that the implications of allowing HTTP GET exposure are considered in advance of allowing them to occur.
This is opposed to afterwards when it might be too late.
Note: If your action method does not return sensitive data, then it should be safe to...
git pull VS git fetch Vs git rebase
...
It should be pretty obvious from your question that you're actually just asking about the difference between git merge and git rebase.
So let's suppose you're in the common case - you've done some work on your master branch, and you pull from origin's, which also has done some work. Af...
Best way to replace multiple characters in a string?
...
Replacing two characters
I timed all the methods in the current answers along with one extra.
With an input string of abc&def#ghi and replacing & -> \& and # -> \#, the fastest way was to chain together the replacements like this: text.rep...
When NOT to use yield (return) [duplicate]
...is h deep. Then there will at most points be O(h) nested iterators built. Calling "MoveNext" on the outer iterator will then make O(h) nested calls to MoveNext. Since it does this O(n) times for a tree with n items, that makes the algorithm O(hn). And since the height of a binary tree is lg n <=...
How to call a method defined in an AngularJS directive?
...="MainCtrl">
<button ng-click="focusinControl.takeTablet()">Call directive function</button>
<p>
<b>In controller scope:</b>
{{focusinControl}}
</p>
<p>
<b>In directive scope:</b>
<focusin con...
Timeout command on Mac OS X?
...
You can use
brew install coreutils
And then whenever you need timeout, use
gtimeout
..instead. To explain why here's a snippet from the Homebrew Caveats section:
Caveats
All commands have been installed with the prefix 'g'.
If ...
Concatenate two string literals
...itial element.
So, when you try to do "Hello" + ",world", what you're really trying to do is add two const char*s together, which isn't possible (what would it mean to add two pointers together?) and if it was it wouldn't do what you wanted it to do.
Note that you can concatenate string liter...