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Strip whitespace from jsp output
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Not directly what you're asking for, but what helps me is putting HTML comment tags in a clever way around my jsp tags, and also putting whitespace inside a servlet tag (<% %>):
${"<!--"}
<c:if test="${first}">
<c:s...
What does LINQ return when the results are empty
...mpty enumerable. This can happen when you chain them together." -- This is what got me. I had a null returned value that I then fed into another query. This caused the second query to throw no matter what I cast it to because there was no value being fed into the second query.
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Proper URL forming with Query String and Anchor Hashtag
When both a query string and anchor tag (hash tag) are visible in a URL, what is the proper order for them to appear?
4 Ans...
How can I remove the outline around hyperlinks images?
...click on that link the Dotted line appears like in the sample image below. What's the solution for this?
18 Answers
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Create a folder if it doesn't already exist
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What about a helper function like this:
function makeDir($path)
{
$ret = mkdir($path); // use @mkdir if you want to suppress warnings/errors
return $ret === true || is_dir($path);
}
It will return true if the dir...
General suggestions for debugging in R
...ource() a .R file and it returns an error at line #n, but you need to know what function is located at line #n.
setBreakpoint() takes a source file name and line number and sets a breakpoint there
The codetools package, and particularly its checkUsage function can be particularly helpful in quick...
How does cookie based authentication work?
...orks? I've never done anything involving either authentication or cookies. What does the browser need to do? What does the server need to do? In what order? How do we keep things secure?
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Protected in Interfaces
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Because an interface is supposed to mean "what you can see from outside the class". It would not make sense to add non-public methods.
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ASP.NET: Session.SessionID changes between requests
...: once you store any object on session, the session id will be fix. That's what I meant to say with "unless you access your session object on the backend...". Once you assign someid the session if will remain the same. Take into account that this answer is more than 4 years old, not sure if there wa...
Linking R and Julia?
...of code. Before I invest the time in learning Julia, though, I am curious what facilities there are for embedding Julia snippets in R code.
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