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How to create a template function within a class? (C++)
... Not exactly true. The definition can be in a cpp file, as long as it is called once for each unique template parameter n-uplet from a non-template function/method after it has been defined.
– Benoît
Jun 9 '09 at 21:13
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Creating a new directory in C
...estion, here is the code to create multiple levels of directories and than call fopen. I'm using a gnu extension to print the error message with printf.
void rek_mkdir(char *path) {
char *sep = strrchr(path, '/');
if(sep != NULL) {
*sep = 0;
rek_mkdir(path);
*sep = '...
How can I map True/False to 1/0 in a Pandas DataFrame?
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I've got a dataframe with a boolean column, and I can call df.my_column.mean() just fine (as you imply), but when I try: df.groupby("some_other_column").agg({"my_column":"mean"}) I get DataError: No numeric types to aggregate, so it appears they are NOT always the same. Just FYI...
How can I generate an ObjectId with mongoose?
I'd like to generate a MongoDB ObjectId with Mongoose. Is there a way to access the ObjectId constructor from Mongoose?
...
Greenlet Vs. Threads
... useful when there's a lot of work to be done in userspace, and that's typically CPU-heavy stuff. Concurrency is useful for breaking apart problems, enabling different parts to be scheduled and managed more easily in parallel.
Greenlets really shine in network programming where interactions with on...
Check whether a variable is a string in Ruby
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combine this with a to_s call after checking if the object responds_to it, and you got yourself a string!
– seanmakesgames
Jul 31 '16 at 2:46
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Grep not as a regular expression
...able someVar, likely the empty string.
So in the first example, it's like calling grep without any argument, and that's why it gives you a usage output. The second example should not return all rows containing someVar but all lines, because the empty string is in all lines.
To tell the shell to no...
How to list of all the tables defined for the database when using active record?
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Call ActiveRecord::ConnectionAdapters::SchemaStatements#tables. This method is undocumented in the MySQL adapter, but is documented in the PostgreSQL adapter. SQLite/SQLite3 also has the method implemented, but undocumented...
What's the concept of and differences between Framebuffer and Renderbuffer in OpenGL?
...ly. Firstly:
The final rendering destination of the OpenGL pipeline is called [the] framebuffer.
Whereas:
Renderbuffer Object
In addition, renderbuffer object is newly introduced for offscreen rendering. It allows to render a scene directly to a renderbuffer object, instead of rendering ...
How to get current time with jQuery
...ly). So as mentioned in another answer, using moment.js sounds like a good idea. momentjs.com
– Chris
May 4 '15 at 8:38
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