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How are virtual functions and vtable implemented?
...class)
This one's a little trickier, since the vtbl itself is probably in read-only memory.
int f3(A*) { return 0; }
mprotect(*(void **)x,8,PROT_READ|PROT_WRITE|PROT_EXEC);
// Or VirtualProtect on win32; this part's very OS-specific
(*(int (***)(A *)x)[0] = f3;
// Now C::f1() returns 0 (remember ...
How do you display code snippets in MS Word preserving format and syntax highlighting?
...
This worked beautifully. I already had Notepad++ for other code projects, but never thought of using it. Combined with a Word style that added a faint blue background, border, and disabled spell check, it looks pretty good, and is fairly fast for a numbe...
What is the difference between print and puts?
...
puts adds a new line to the end of each argument if there is not one already.
print does not add a new line.
For example:
puts [[1,2,3], [4,5,nil]] Would return:
1
2
3
4
5
Whereas print [[1,2,3], [4,5,nil]]
would return:
[[1,2,3], [4,5,nil]]
Notice how puts does not output the nil va...
What is SQL injection? [duplicate]
... string. By being very clever, they can manipulate the result of queries, reading data or even changing data that they shouldn't be allowed to do.
Example in PHP:
$password = $_POST['password'];
$id = $_POST['id'];
$sql = "UPDATE Accounts SET PASSWORD = '$password' WHERE account_id = $id";
Now ...
Matplotlib tight_layout() doesn't take into account figure suptitle
...ked like charm, but how the change happens when specifying bounding box? I read the doc but not much was clear to me. It would be great if you could please explain to me! Thanks.
– thepunitsingh
Nov 24 '17 at 13:22
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How do I kill background processes / jobs when my shell script exits?
...31317 but you could redirect the output of jobs -p to a temporary file and read it from there for kill.
– jarno
Aug 22 at 5:39
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show 2 more...
How can I wait for a thread to finish with .NET?
I've never really used threading before in C# where I need to have two threads, as well as the main UI thread. Basically, I have the following.
...
Plot two graphs in same plot in R
...() will detect this and in turn use plot.function() to plot your function (read up on multiple dispatch to learn more about this). However, lines.function() is not defined, so lines() doesn't know what to do with a parameter of class function. lines can only deal with your data and time series objec...
Google Play app description formatting
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Windows: Hold Alt 2022 release Alt
Mac and Windows require some setup, read on Wikipedia
PPS If you're feeling creative, here's a good link with more copypastable symbols, but don't go too crazy, nobody likes clutter in what they read.
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Learning WebGL and three.js [closed]
...nderstand the WebGL concepts. That means, that you just need to be able to read someone else's WebGL code and understand what you read. That is a lot easier than being expected to write a WebGL program yourself from scratch. You can learn the WebGL concepts sufficiently well using any of the tutoria...