If you don’t have permission to the file (e.g. you don’t own the file), then it will not force the write. If you do have permission to the file, but it is a read-only file, then you can force-write it. It’s as if you first change the file mode to writable, write your changes, and … Read more
It’s done so that addition doesn’t need to have any special logic for dealing with negative numbers. Check out the article on Wikipedia. Say you have two numbers, 2 and -1. In your “intuitive” way of representing numbers, they would be 0010 and 1001, respectively (I’m sticking to 4 bits for size). In the two’s … Read more
The C++ FAQ Lite has a entry specifically for this https://isocpp.org/wiki/faq/freestore-mgmt#delete-this I think this quote sums it up nicely As long as you’re careful, it’s OK for an object to commit suicide (delete this).
Two’s complement is a clever way of storing integers so that common math problems are very simple to implement. To understand, you have to think of the numbers in binary. It basically says, for zero, use all 0’s. for positive integers, start counting up, with a maximum of 2(number of bits – 1)-1. for negative … Read more
How do I declare an array in Python? I can’t find any reference to arrays in the documentation.
Your gif is disposal = 3 that means it needs previous image as it renders incrementally. The problem is the image is with black background and not white … Here are the disposals possible: When I render it with my decoder it looks like this: [![capture][1]][1] So there are 2 possible things at play here: … Read more
In computing, an idempotent operation is one that has no additional effect if it is called more than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set. In mathematics, an idempotent operation is one where f(f(x)) = f(x). For example, the … Read more
Sure. Something like this should do the trick: EDIT Also, for those interested in data.table, there is this:
There are actually two ways to add a favicon to a website. <link rel=”icon”> Simply add the following code to the <head> element: PNG favicons are supported by most browsers, except IE <= 10. For backwards compatibility, you can use ICO favicons. Note that you don’t have to precede icon in rel attribute with shortcut … Read more
I want to generate a PDF by passing HTML contents to a function. I have made use of iTextSharp for this but it does not perform well when it encounters tables and the layout just gets messy.