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What does .SD stand for in data.table in R
...iping can be beautiful
library(Lahman)
Teams = as.data.table(Teams)
# *I'm selectively suppressing the printed output of tables here*
Teams
Pitching = as.data.table(Pitching)
# subset for conciseness
Pitching = Pitching[ , .(playerID, yearID, teamID, W, L, G, ERA)]
Pitching
Naked .SD
To illustrat...
How do I print a list of “Build Settings” in Xcode project?
...Build Settings” when it's built:
To add, (with the target in question selected) under the Build Phases tab-section click the little ➕ button a dozen-or-so pixels up-left-ward from the Target Dependencies section, and set the shell to /bin/bash and the command to export. You'll also probabl...
File I/O in Every Programming Language [closed]
...ol compiler
ENVIRONMENT DIVISION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT StudentFile ASSIGN TO "STUDENTS.DAT"
ORGANIZATION IS LINE SEQUENTIAL.
DATA DIVISION.
FILE SECTION.
FD TestFile.
01 TestData.
02 LineNum PIC X.
02 LineText PIC X(72).
PROCEDURE DIVISION.
B...
Check whether a path is valid in Python without creating a file at the path's target
...rno.ERANGE. (This appears to be an OS-level bug, otherwise referred to as "selective interpretation" of the POSIX standard.)
Under all other OSes, errno.ENAMETOOLONG.
Crucially, this implies that only pathnames residing in existing directories are validatable. The os.stat() and os.lstat() functi...
Usage of __slots__?
...This message comes from the oldest protocol, which is the default. You can select the latest protocol with the -1 argument. In Python 2.7 this would be 2 (which was introduced in 2.3), and in 3.6 it is 4.
>>> pickle.loads(pickle.dumps(f, -1))
<__main__.Foo object at 0x1129C770>
in Py...
Fastest exit strategy for a Panic Button in Crisis/Abuse Websites? [closed]
...on:
it is hard to click on it (you have to be accurate)
it takes time to select it (and a huge amount of time if you are on laptop without a mouse)
it saves you in history
it is accessible via back button / backspace.
And how about the panicking random moves of a woman who is trying to quickly c...
What are the differences between git branch, fork, fetch, merge, rebase and clone?
...resolve' them by editing the files (which will have both changes in them), selecting the changes you want, literally deleting the lines of the changes you don't want and then saving the file. The changes are marked with separators such as ======== and <<<<<<<<.
Once you hav...
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
... table view cell is tapped
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You tapped cell number \(indexPath.row).")
}
}
Important Note:
It is the following two lines of code (along with auto layout) that make the variable cell height possi...
Callback functions in C++
... for jumping, the engine can call
game_core_instance.update_keybind(newly_selected_key, &player_jump);
and thus change the behaviour of a call to key_pressed (which the calls player_jump) once this button is pressed the next time ingame.
What are callables in C++(11)?
See C++ concepts: Call...
How do I safely pass objects, especially STL objects, to and from a DLL?
...ply specific packing. The compiler will still apply default packing if you select a pack value bigger than the one the compiler would have chosen, so if you pick a large packing value, a class can still have different packing between compilers. The solution for this is to use #pragma pack(1), which ...