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How to use enums as flags in C++?
...unique flags can be done using a bit shift. I, myself, find this easier to read.
enum Flags
{
A = 1 << 0, // binary 0001
B = 1 << 1, // binary 0010
C = 1 << 2, // binary 0100
D = 1 << 3, // binary 1000
};
It can hold values up to an int so that is, most of ...
Load “Vanilla” Javascript Libraries into Node.js
...rts = function(path, context) {
context = context || {};
var data = fs.readFileSync(path);
vm.runInNewContext(data, context, path);
return context;
}
And it can be used like this:
> var execfile = require("execfile");
> // `someGlobal` will be a global variable while the script runs...
Why does sudo change the PATH?
... Not only is it counterintuitive, it's incorrectly documented. Reading the man pages for sudo, and comparing the config against a Fedora box, I thought the path should be preserved. Indeed, "sudo -V" even says "Environment variables to preserve: PATH".
– Jason R. Co...
How do you render primitives as wireframes in OpenGL?
... (line_strip, max_vertices=3) out; to layout (points, max_vertices=3) out;
Read more about Geometry Shaders
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Is there a way to tell git to only include certain files instead of ignoring certain files?
...
I haven't had need to try this myself, but from my reading of TFM it looks like a negated pattern would do what you want. You can override entries in .gitignore with later negated entries. Thus you could do something like:
*.c
!frob_*.c
!custom.c
To have it ignore all .c f...
How and where are Annotations used in Java?
...'t affect the semantics of a program directly. However, annotations can be read at run-time using Reflection & this process is known as Introspection. Then it could be used to modify classes, fields or methods.
This feature, is often exploited by Libraries & SDKs (hibernate, JUnit, Spring F...
Invalid postback or callback argument. Event validation is enabled using '
...opulate it from a split of your text field contents.
Then, when you are ready to post it, you repopulate the hidden field's contents from your modified <select>. Then, of course, you have to split that again on the server and do something with your items, since your select is empty now tha...
How can I shuffle the lines of a text file on the Unix command line or in a shell script?
... 'Signal.trap("SIGPIPE", "SYSTEM_DEFAULT");
puts ARGF.readlines.shuffle' "$@"; }
Performance comparison:
Note: These numbers were obtained on a late-2012 iMac with 3.2 GHz Intel Core i5 and a Fusion Drive, running OSX 10.10.3. While timings will vary with OS used, machine s...
Maven in Eclipse: step by step installation [closed]
I have spent been on the Maven site reading the 5- and 30-minute tutorials, and trialing Maven out for the first time.
13 A...
How do I unlock a SQLite database?
...nges related to file locking introduced in v3 and may be useful for future readers. https://www.sqlite.org/lockingv3.html
The SQLite wiki DatabaseIsLocked page offers a good explanation of this error message. It states, in part, that the source of contention is internal (to the process emitting the...