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Why would $_FILES be empty when uploading files to PHP?
...ES, not smart quotes pasted in from Word OR from a website blog (WordPress converts straight quotes to angle quotes!). If you have multiple forms on the page, make sure they both have this attribute. Type them in manually, or try straight single quotes typed in manually.
Make sure you do not have tw...
What is this crazy C++11 syntax ==> struct : bar {} foo {};?
... {} foo; // anonymous derived UDT, and instance thereof
Finally, C++11 introduces extended initialisers, such that we can do confusing things like this:
int x{0};
And this:
int x{};
And, finally, this:
struct : bar {} foo {};
This is an unnamed struct deriving from bar, instantiated a...
How do I break out of a loop in Scala?
...ing--this depends on details of how the takeWhile test and the foreach are interleaved during evaluation, and probably shouldn't be used in practice!).
(1b) Use tail recursion instead of a for loop, taking advantage of how easy it is to write a new method in Scala:
var sum = 0
def addTo(i: Int, ma...
Ruby regular expression using variable name
...It used to be that a string replacement argument to gsub was automatically converted to a regular expression. I know it was that way in 1.6. I don't recall which version introduced the change).
As noted in other answers, you can use Regexp.new as an alternative to interpolation:
var = "*This*"
s...
How does Trello access the user's clipboard?
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Daniel LeCheminant's code didn't work for me after converting it from CoffeeScript to JavaScript (js2coffee). It kept bombing out on the _.defer() line.
I assumed this was something to do with jQuery deferreds, so I changed it to $.Deferred() and it's working now. I tested i...
Passing a Bundle on startActivity()?
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You have a few options:
1) Use the Bundle from the Intent:
Intent mIntent = new Intent(this, Example.class);
Bundle extras = mIntent.getExtras();
extras.putString(key, value);
2) Create a new Bundle
Intent mIntent = new Intent(this, Example.class);
Bundle mBundle = new ...
Can I mix Swift with C++? Like the Objective-C .mm files
...oa and Objective-C" also tells us:
You cannot import C++ code directly into Swift. Instead, create an Objective-C or C wrapper for C++ code.
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Table Header Views in StoryBoards
...a Table Header View (tableHeaderView) in StoryBoard (like we used to do in Interface Builder)?
3 Answers
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Code equivalent to the 'let' keyword in chained LINQ extension method calls
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There is also a .Let extension method in System.Interactive, but its purpose is to introduce a lambda expression to be evaluated 'in-line' in a fluent expression. For instance, consider (in LinqPad, say) the following expression that creates new random numbers every time i...
How to find a min/max with Ruby
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In addition to the provided answers, if you want to convert Enumerable#max into a max method that can call a variable number or arguments, like in some other programming languages, you could write:
def max(*values)
values.max
end
Output:
max(7, 1234, 9, -78, 156)
=> 12...