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Real mouse position in canvas [duplicate]
..., evt) {
var rect = canvas.getBoundingClientRect();
return {
x: evt.clientX - rect.left,
y: evt.clientY - rect.top
};
}
Just call it from your event with the event and canvas as arguments. It returns an object with x and y for the mouse positions.
As the mouse position you...
How to get number of entries in a Lua table?
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I still shudder at the memory of my experience with Lua, when I first realised that the return value of a basic operator like # is not deterministic.
– Roman Starkov
May 5 '12 at 17:07
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How can I convert String to Int?
I have a TextBoxD1.Text and I want to convert it to an int to store it in a database.
30 Answers
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Why is `[` better than `subset`?
When I need to filter a data.frame, i.e., extract rows that meet certain conditions, I prefer to use the subset function:
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How to use a variable to specify column name in ggplot
...<- function( column ) {
...
ggplot( rates.by.groups, aes_string(x="name", y="rate", colour= column,
group=column ) )
}
as long as you pass the column to the function as a string (f("majr") rather than f(majr)). Also note that we changed the other ...
Get the full URL in PHP
...TP_HOST]$_SERVER[REQUEST_URI]";
(Note that the double quoted string syntax is perfectly correct)
If you want to support both HTTP and HTTPS, you can use
$actual_link = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_UR...
fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'
...ficiency of cuda. I think the library files linked are all compiled on the x86 platform, but when I compile it, I get the error message "fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'".
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Why is the apt-get function not working in the terminal on Mac OS X v10.9 (Mavericks)?
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Mac OS X doesn't have apt-get. There is a package manager called Homebrew that is used instead.
This command would be:
brew install python
Use Homebrew to install packages that you would otherwise use apt-get for.
The page I linke...
Formatting Decimal places in R
I have a number, for example 1.128347132904321674821 that I would like to show as only two decimal places when output to screen (or written to a file). How does one do that?
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