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Type of conditional expression cannot be determined because there is no implicit conversion between
...has type X and y has type Y then
If an implicit conversion (§6.1) exists from X to Y, but not from Y to X, then Y is the type of the conditional expression.
If an implicit conversion (§6.1) exists from Y to X, but not from X to Y, then X is the type of the conditional expression.
Otherwise, no ...
Is recursion ever faster than looping?
...n some environments these functions are the first (or only) to get a boost from automatic parallelization — so they can be significantly faster than either iteration or recursion. Data Parallel Haskell is an example of such an environment.
List comprehensions are another alternative, but these ...
Maven dependency for Servlet 3.0 API?
...s. Is there a source that confirms this assumption?
The maven repository from Java.net indeed offers the following artifact for the WebProfile:
<repositories>
<repository>
<id>java.net2</id>
<name>Repository hosting the jee6 artifacts</name>
<u...
403 Forbidden vs 401 Unauthorized HTTP responses
...
A clear explanation from Daniel Irvine:
There's a problem with 401 Unauthorized, the HTTP status code for authentication errors. And that’s just it: it’s for authentication, not authorization.
Receiving a 401 response is the server tel...
How do I simply create a patch from my latest git commit?
I'm looking for the magic command of creating a patch from the last commit made.
5 Answers
...
Purging file from Git repo failed, unable to create new backup
I tried to remove a file from my remote repo by running:
4 Answers
4
...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
...tReferenceException e) {
System.out.println("Attempting to recover from StaleElementReferenceException ...");
return getStaleElemById(id);
}
}
Yes, it just keeps polling the element until it's no longer considered stale (fresh?). Doesn't really get to the root of the problem, b...
Cross-Origin Request Headers(CORS) with PHP headers
...e CORS-compliant method. It will allow any GET, POST, or OPTIONS requests from any
* origin.
*
* In a production environment, you probably want to be more restrictive, but this gives you
* the general idea of what is involved. For the nitty-gritty low-down, read:
*
* - https://developer....
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
...ng gemsets:
$ rvm upgrade 1.9.2-p0 1.9.2
Are you sure you wish to upgrade from ruby-1.9.2-p0 to ruby-1.9.2-p136? (Y/n): Y
To replace with the latest stable release of 1.9.2. This avoids clutter.
Some additional helpful tips, thanks to comments (@Mauro, @James, @ACB)
$ rvm list known
# NOTE: yo...
CURL to access a page that requires a login from a different page
...
My answer is a mod of some prior answers from @JoeMills and @user.
Get a cURL command to log into server:
Load login page for website and open Network pane of Developer Tools
In firefox, right click page, choose 'Inspect Element (Q)' and click on Network tab
Go...