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How to detect if multiple keys are pressed at once using JavaScript?
...'m trying to develop a JavaScript game engine and I've came across this problem:
13 Answers
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Index all *except* one item in python
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For a list, you could use a list comp. For example, to make b a copy of a without the 3rd element:
a = range(10)[::-1] # [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
b = [x for i,x in enumerate(a) if i!=3] # [9, 8, 7, 5, 4, 3, 2, 1, 0]
This is very general, and can be use...
Remove elements from collection while iterating
...currentModificationException.
Suppose we have the following collection of books
List<Book> books = new ArrayList<Book>();
books.add(new Book(new ISBN("0-201-63361-2")));
books.add(new Book(new ISBN("0-201-63361-3")));
books.add(new Book(new ISBN("0-201-63361-4")));
Collect and Remove...
List of tuples to dictionary
...dict() on the list of tuples directly
>>> my_list = [('a', 1), ('b', 2)]
>>> dict(my_list)
{'a': 1, 'b': 2}
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Friend declaration in C++ - difference between public and private
Is there a difference between declaring a friend function/class as private or public? I can't seem to find anything about this online.
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Draw a perfect circle from user's touch
...en as they touch with their fingers. Very simple App I did as exercise way back.
My little cousin took the liberty of drawing things with his finger with my iPad on this App (Kids drawings: circle, lines, etc, whatever came to his mind).
Then he started to draw circles and then he asked me to make i...
shortcut for creating a Map from a List in groovy?
...to do exactly that: converting a list into a map. This question was posted before Groovy version 1.7.9 came out, so the method collectEntries didn't exist yet. It works exactly as the collectMap method that was proposed:
Map rowToMap(row) {
row.columns.collectEntries{[it.name, it.val]}
}
If f...
Detect Browser Language in PHP
I use the following PHP script as index for my website.
12 Answers
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What's valid and what's not in a URI query?
I've been Googling this back and forth reading RFCs and SO questions trying to crack this, but I still don't got jack.
7 An...
What characters are valid for JavaScript variable names?
Which characters can be used for naming a JavaScript variable?
12 Answers
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